General Science Class 7

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General Science Class 7 MCQs for 7th grade students general science and ability subject exam test preparation.

General Science Class 7 MCQs

The SI unit of electric current is:

  1. Ampere
  2. Volt
  3. Coulomb
  4. none of these

Mass number of an atom shows:

  1. Numbers of protons
  2. Number of electrons
  3. Number of proton and neutron
  4. Number of proton and electrons

Protons and neutrons are collectively known as:

  1. Nucleotides
  2. Nucleons
  3. Isotopes
  4. Positrons

Our solar system is located in which galaxy:

  1. Andromeda
  2. Milky way
  3. Whirlpool
  4. Black eye

How many times the proton is heavier than an electron?

  1. 1030
  2. 1205
  3. 1650
  4. 1836

The average adult has a blood volume of about ___ litters.

  1. 6
  2. 4
  3. 8
  4. 5

The SI unit of resistance is:

  1. Volt
  2. Ohm
  3. Ampere
  4. Farad

The Sun is a:

  1. Planet
  2. Element
  3. Asteroid
  4. Star

The lungs receive deoxygenated blood from heart through:

  1. Renal artery
  2. Branchial artery
  3. Pulmonary artery
  4. Pulmonary vein

When white light is passed through a prism, it splits into _____ colors.

  1. 7
  2. 8
  3. 2
  4. 4

The brightest star visible in the sky without a telescope is?

  1. Altair
  2. Aretonus
  3. Regulus
  4. Sirius

Light year is a unit of:

  1. Light
  2. Distance
  3. Time
  4. All of these

A light year is related to:

  1. Time
  2. Distance
  3. Frequency
  4. None

In which color the hottest stars are appeared?

  1. Red
  2. Blue
  3. Dark
  4. Green

A chemical process that changes vegetable oil into fat is called:

  1. Combustion
  2. Hydrogenation
  3. Hydration
  4. Neutralization

What is the normal value of blood pressure in the body?

  1. 80 to 120mg/100 ml of blood
  2. 70to 120mg/100 ml of blood
  3. 60 to 120mg/100 ml of blood
  4. 90 to 120mg/100 ml of blood

The following are common diseases of the respiratory system except?

  1. Tuberculosis
  2. Hepatitis
  3. Asthma
  4. Pneumonia

The stomach is like a___bag:

  1. I-shaped
  2. J-shaped
  3. K-shaped
  4. L-shaped

A form of energy which flows from a region of high temperature to a region of low temperature is known as?

  1. Heat
  2. Light
  3. Sound
  4. Work

A sphygmomanometer is used to check:

  1. Blood pressure
  2. White blood cells
  3. Sugar level
  4. None

What are the charges of Proton, Electron, and Neutron respectively?

  1. Negative, Positive, Neutral
  2. Neutral, Negative, Positive
  3. Positive, Negative, Neutral
  4. Neutral, Positive, Negative

Which of the following is NOT a digestive function?

  1. Filtration
  2. Absorption
  3. Mechanical processing
  4. Ingestion

“Digestion”, alone, refers to the (very specific answer)?

  1. Absorption of nutrients
  2. Transport of nutrients
  3. Chemical/mechanical breakdown of food
  4. Elimination of waste

Which is not a tissue layer of the alimentary canal?

  1. Mucosa
  2. Secretin
  3. Muscular
  4. Serosa

The breakdown of large food particles into small particles is called?

  1. Egestion
  2. Absorption
  3. Utilization
  4. Digestion

A continuous tube, extending from the mouth to the anus is called?

  1. Respiratory Tract
  2. Alimentary Canal
  3. Nervous System
  4. Circulatory System

Each of the following organs is a component of the digestive tract except one. Identity the exception:

  1. Spleen
  2. Oesophagus
  3. Stomach
  4. Colon

In mouth saliva starts the chemical digestion of:

  1. Proteins
  2. Fats
  3. Carbohydrates
  4. Fibers

Food is reduced to a soft and flexible semi-solid food called?

  1. Chyme
  2. Morsel
  3. Gastrografin
  4. Bolus

Which of the following acts as a pathway and transports the food from pharynx to stomach?

  1. Small intestine
  2. Oesophagus
  3. Trachea
  4. Mouth

Where chemical digestion of proteins start?

  1. Oesophagus
  2. Small intestine
  3. Mouth
  4. Stomach

Which structure prevents the food from entering the larynx during swallowing?

  1. Epiglottis
  2. Pharynx
  3. Tongue
  4. Oesophagus

During the swallowing of food:

  1. The epiglottis opens
  2. The glottis closes
  3. The trachea dilates
  4. The epiglottis closes

Food is normally digested in the:

  1. Large intestine
  2. Stomach
  3. Small Intestine
  4. Mouth

Which of the following is secreted by liver and stored in the gallbladder?

  1. Saliva
  2. Bile
  3. Gastric juice
  4. Pancreatic juice

____ acts as fats decomposers into smaller pieces in human digestive system.

  1. Gastric juice
  2. Pancreatic juice
  3. Bile
  4. Saliva

Absorption only occurs in:

  1. Small Intestine
  2. Large intestine
  3. Stomach
  4. Mouth

____ contains enzymes which help to digest proteins, fats and carbohydrates?

  1. Pancreatic juice
  2. Gastric juice
  3. Saliva
  4. Bile

Undigested food is expelled from the human body through:

  1. Small intestine
  2. Stomach
  3. Large Intestine
  4. Oesophagus

The water and mineral salts are absorbed in:

  1. Large Intestine
  2. Small intestine
  3. Stomach
  4. Oesophagus

If rhythmic action of digestive tract becomes slow cause:

  1. Diarrhea
  2. Vomiting
  3. Abdominal Pain
  4. Constipation

If rhythmic action of digestive tract becomes fast cause:

  1. Diarrhea
  2. Vomiting
  3. Abdominal Pain
  4. Constipation

Respiration involves:

  1. Only Mechanical Process
  2. Only Biochemical Process
  3. Mechanical and Biochemical processes
  4. Neither Mechanical nor Biochemical Process

If oxygen is used in the respiration process like humans it is called?

  1. Anaerobic Respiration
  2. Photosynthesis
  3. Fermentation
  4. Aerobic Respiration

Which of the following is NOT a characteristic of burning process?

  1. It is a physical process
  2. It is a chemical process
  3. It takes place in all living cells
  4. It release energy
  5. Various enzymes are required

In human and higher animals the exchange of gases is carried put by:

  1. Circulatory processes
  2. Respiratory processes
  3. Digestive processes
  4. Nervous processes

The blood vessels that carry blood from other parts of body to the heart are called?

  1. Arteries
  2. Capillaries
  3. Veins
  4. None

All veins transport de-oxygenated blood to the heart except?

  1. Pulmonary Vein
  2. Pulmonary Artery
  3. Veins
  4. Arteries

Doctors usually check the blood pressure of body through apparatus called:

  1. Thermometer
  2. Sphygmomanometer
  3. Glucometer
  4. Stethoscope

Circulation of blood starts from the:

  1. Right side of the heart
  2. Left side of the heart
  3. Top of the heart
  4. Bottom of the heart

Which one of the following is the main reason of heart attack?

  1. Low blood pressure
  2. Anaemia
  3. Dehydration
  4. Cholesterol

Heart attack is scientifically known as?

  1. Cardiac Arrest
  2. Coronary Thrombosis
  3. Myocardial Infarction
  4. Arterial Fibrillation

In plants, water and minerals are transported from roots to the leaves by:

  1. Phloem
  2. Xylem
  3. Stomata
  4. Cambium

In plants, which part transports sugar produced in the leaves to all parts of plants?

  1. Phloem
  2. Xylem
  3. Stomata
  4. Roots

The tubular outgrowth part of roots in plants have the function of ___in the system.

  1. Support the plant
  2. Absorb salts and gases
  3. Photosynthesis
  4. Reproduction

Water enters the root hair by:

  1. Diffusion
  2. Osmosis
  3. Active Transport
  4. Transpiration

The evaporation of water from aerial parts of the plant especially through leaves is called?

  1. Translocation
  2. Photosynthesis
  3. Respiration
  4. Transpiration

The movement of materials/sugar from the leaves to other tissues of the plant is called?

  1. Translocation
  2. Photosynthesis
  3. Respiration
  4. Transpiration

The male reproductive part of the flower is called?

  1. Stamen
  2. Pistil
  3. Carpel
  4. Anther

The female reproductive part of the flower is called?

  1. Stamen
  2. Pistil
  3. Anther
  4. Filament

Pollen grains are microscopic structure located in _____ of flower:

  1. Stamen
  2. Anther
  3. Pistil
  4. Petal

Plants in garden are usually pollinated by:

  1. Animals
  2. Water
  3. Sunlight
  4. Insects

Fruit plants are mostly pollinated by:

  1. Insects
  2. Water
  3. Animals
  4. Sunlight

The process by which living organism increase their numbers is known as?

  1. Reproduction
  2. Respiration
  3. Digestion
  4. Photosynthesis

The type of reproduction in which two parents of different sexes are involved?

  1. Asexual Reproduction
  2. Sexual Reproduction
  3. Binary Fission
  4. Fragmentation

Which reproduction performed by flowers?

  1. Asexual Reproduction
  2. Binary Fission
  3. Sexual Reproduction
  4. Fragmentation

The type of reproduction in which only one parent is involved?

  1. Asexual Reproduction
  2. Sexual Reproduction
  3. Fragmentation
  4. Binary Fission

Roots, stem and leaves produce their offspring through:

  1. Sexual Reproduction
  2. Fragmentation
  3. Binary Fission
  4. Asexual Reproduction

The process in which fusion of male and female cells occur to develop a new plant is called?

  1. Fertilization
  2. Pollination
  3. Reproduction
  4. Germination

Sperms fuse with eggs to form:

  1. Embryo
  2. Fetus
  3. Zygote
  4. Gamete

Zygote forms after the fusion of different:

  1. Gametes
  2. Embryo
  3. Fetus
  4. None

A mature, large ovary and seed are:

  1. Stem
  2. Leaf
  3. Flower
  4. Fruit

A place of living according to particular environment of living things is?

  1. Ecosystem
  2. Habitat
  3. Community
  4. Population

The actual location or place where an organism lives and reproduce is:

  1. Habitat
  2. Ecosystem
  3. Community
  4. Population

Water contain very low amount of salt is?

  1. Estuarine water
  2. Marine water
  3. Freshwater
  4. Solid water

Water contain high amount of salt is?

  1. Estuarine water
  2. Solid water
  3. Freshwater
  4. Marine water

Area where river meet with sea is?

  1. Estuarine water
  2. Solid water
  3. Freshwater
  4. Marine water

The interaction of living organisms with each other and with their environment is?

  1. Community
  2. Population
  3. Ecosystem
  4. Habitat

A land where rainfall is high i.e 250 to 450 mm annually is called?

  1. Forest
  2. Grassland
  3. Tundra
  4. Desert

A land where rainfall is lower than forest so it does not support growth of trees is called?

  1. Forest
  2. Grassland
  3. Tundra
  4. Desert

Area where rainfall is very low resulting barren area is called?

  1. Forest
  2. Grassland
  3. Tundra
  4. Desert

Area below ice caps which are very cold climate is called?

  1. Forest
  2. Grassland
  3. Tundra
  4. Desert

The food chain always starts from:

  1. Producers
  2. Consumers
  3. Decomposers
  4. Predators

The transfer of energy from producers to consumers and then to decomposers is known as:

  1. Food Web
  2. Food Chain
  3. Ecosystem
  4. Nutrient Cycle

In an ecosystem several food chains overlap form a network called:

  1. Ecosystem
  2. Food Web
  3. Food Chain
  4. Nutrient Cycle

How much percentage of water on the earth is saltwater?

  1. 90%
  2. 95%
  3. 98.5%
  4. 97.5%

How much percentage of water on the earth is freshwater?

  1. 2.5%
  2. 3.5%
  3. 4.5%
  4. 5.5%

Which one of the following tablets are used for water purification?

  1. Aspirin
  2. Antibiotic
  3. Vitamin C
  4. Halazone

The following are the methods to purify water except?

  1. Filtration
  2. Distillation
  3. Crystallization
  4. Chlorination

A process by which solvent passes through a porous membrane called?

  1. Filtration
  2. Distillation
  3. Osmosis
  4. Sedimentation

The maximum mass of an atom is concentrated in:

  1. Electron
  2. Proton
  3. Neutron
  4. Nucleus

Periods in the periodic table are:

  1. Vertical columns
  2. Horizontal rows
  3. Diagonal lines
  4. Blocks

An atom has the same number of:

  1. Electrons and Neutrons
  2. Protons and Neutrons
  3. Electrons and Protons
  4. Neutrons and Molecules

The specific number of protons present in the nucleus of every an atom is called its?

  1. Atomic Number
  2. Mass Number
  3. Atomic Mass
  4. Valance Number

The sum of protons and neutrons in the nucleus of an atom is known as:

  1. Atomic Mass
  2. Mass Number
  3. Atomic Number
  4. Valance Number

An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of an atom is?

  1. 11
  2. 12
  3. 22
  4. 23
  5. 24

An atom has atomic number 16 and mass number 32, the number of protons is?

  1. 32
  2. 14
  3. 16
  4. 18

In the periodic table, rows is considered to be a:

  1. Periods
  2. Groups
  3. Zigzag
  4. Diagonal

In the periodic table, columns is considered to be a:

  1. Periods
  2. Groups
  3. Zigzag
  4. Diagonal

In periodic table elements are arranged according to:

  1. Increasing atomic mass
  2. Decreasing atomic number
  3. Both A and B
  4. Increasing in atomic number

In modern periodic table, how many periods are there?

  1. 7
  2. 8
  3. 9
  4. 6

In modern periodic table, how many groups are there?

  1. 12
  2. 18
  3. 7
  4. 8

The number shown above the symbol of element is called?

  1. Mass Number
  2. Valency
  3. Atomic Number
  4. Oxidation State

The number shown below the symbol of element is called?

  1. Mass Number
  2. Atomic Number
  3. Valance Number
  4. Atomic Mass

The maximum number of electrons K orbit possesses?

  1. 2
  2. 4
  3. 6
  4. 8

The maximum number of electrons L orbit possesses?

  1. 4
  2. 8
  3. 12
  4. 18

The maximum number of electrons M orbit possesses?

  1. 4
  2. 8
  3. 12
  4. 18

Ions are charged particles of atoms and form negative and positive charges due to:

  1. Proton
  2. Electron
  3. Neutron
  4. None

Atoms that gain electron will become negatively charged ion and they are known as?

  1. Ion
  2. Cation
  3. Isotope
  4. Anion

Nuclei having the same nuclear charge but different masses are called:

  1. Isobars
  2. Isotopes
  3. Isoelectronic
  4. Isomers

Isotopes of an element are identical in:

  1. Mass number
  2. Electron number
  3. Valency
  4. Atomic number

How many proton is present in the nucleus of Protium isotope?

  1. 3
  2. 2
  3. 1
  4. 0

How many proton and neutron are present in the nucleus of Deuterium isotope?

  1. 3 and 2
  2. 2 and 3
  3. 1 and 1
  4. 2 and 2

How many proton and neutron are present in the nucleus of Tritium isotope?

  1. 2 and 1
  2. 1 and 2
  3. 3 and 2
  4. 4 and 1

Which isotope is used for diagnosis and treatment of Wilson’s disease?

  1. Copper – 64
  2. Gallium – 67
  3. Cobalt – 60
  4. Iron – 59

Which among the following isotope is used to kill cancer cells by a particular type of treatment, known as radiotherapy?

  1. Gallium – 67
  2. Cobalt – 60
  3. Iron – 59
  4. Copper – 64

Which among the following isotope is used for detection of prolonged infection and cancer cells?

  1. Copper – 64
  2. Gallium – 67
  3. Cobalt – 60
  4. Iron – 59

Which among the following isotope is used for radiotherapy to stop the growth of cancer cells?

  1. Copper – 64
  2. Gallium – 67
  3. Cobalt – 60
  4. Iron – 59

Which among the following isotope is used for diagnosis of function of thyroid gland?

  1. Iodine – 123
  2. Copper – 64
  3. Gallium – 67
  4. Cobalt – 60

Which isotope is used to identity efficiency rates of organic and inorganic fertilizers?

  1. Phosphorus – 32
  2. Carbon – 14
  3. Lead – 210
  4. Nitrogen – 15

Which isotope is used to study the uptake of phosphorus containing fertilizers?

  1. Phosphorus – 32
  2. Carbon – 14
  3. Lead – 210
  4. Nitrogen – 15

Which isotope is used to determine the accumulation rates of pollutants in layers of soil?

  1. Phosphorus – 32
  2. Carbon – 14
  3. Lead – 210
  4. Nitrogen – 15

Carbon dating is used for the estimation of the age of:

  1. Rocks
  2. Fossils
  3. Soil
  4. Water

The symbolic representation of molecule of a compound is called?

  1. Equation
  2. Structure
  3. Formula
  4. Reaction

Chemical formula shows:

  1. Number of atoms of each elements
  2. Number of atoms in a compound
  3. Number of atoms in a molecule
  4. None

Which one of the following is not a sign of chemical change?

  1. No change in composition
  2. A release of gas
  3. Change in colour, temperature, smell
  4. Production of a new material

Which one of the following is not a sign of physical change?

  1. Change that can be reversed
  2. The substance does not turn into a new substance
  3. A release of gas
  4. None

A change in physical appearance or state of a substance is called:

  1. Chemical Change
  2. Physical Change
  3. Nuclear Change
  4. Biological Change

A change that alters the composition of a substances is known as ____?

  1. Physical Change
  2. Nuclear Change
  3. Chemical Change
  4. Biological Change

Which one among the following is not a chemical change?

  1. Melting of ice
  2. Burning of fuel
  3. Explosion of firework
  4. Cooking raw food

What is produced when fuel is burned?

  1. Carbon monoxide gas
  2. Methane gas
  3. Carbon dioxide gas
  4. Helium gas

Which one among the following is a hydrocarbon compound?

  1. Candle wax
  2. Polyurethane
  3. Glycerol
  4. Aspirin

The substance that are added in the soil to make up any deficiency of nutrients are called?

  1. Pesticides
  2. Herbicides
  3. Manure
  4. Fertilizers

Fertilization are used to fill ___requirements of plants.

  1. Water
  2. Nutritional
  3. Space
  4. Light

Burning of wood is a ______ change.

  1. Chemical
  2. Physical
  3. Temporary
  4. Both A and B

Heat is a form of energy associated with:

  1. Atomic Stability
  2. Molecular Motion
  3. Nuclear Reaction
  4. Electromagnetic Radiation

Transfer of internal energy by collision of particles and movements of electrons within the body is called?

  1. Conduction
  2. Convection
  3. Radiation
  4. Insulation

In which mode heat transfer in solids?

  1. Convection
  2. Radiation
  3. Conduction
  4. None

Which among the following is a good conductor of heat?

  1. Wood
  2. Plastic
  3. Paper
  4. Copper

A mode of heat transfer that occurs by the mass motion of a fluid is called?

  1. Radiation
  2. Convection
  3. Conduction
  4. None

In which mode heat transfer in liquids and gases?

  1. Convection
  2. Radiation
  3. Conduction
  4. None

During the daytime, the air above the land gets heated up its density:

  1. Increase
  2. Decrease
  3. Remain same
  4. Fluctuate

During the night time, the air above the land loses heated up its density:

  1. Decrease
  2. Fluctuate
  3. Remain same
  4. Increase

The heat from Sun reaches to earth in form of waves called:

  1. Conduction
  2. Radiation
  3. Convection
  4. None

Refrigerator works on the phenomenon of ____of heat transfer.

  1. Conduction
  2. Convection
  3. Radiation
  4. All of these

The cooling fins at the back of refrigerator are made of black and rough surface because:

  1. They are good conductors of heat
  2. They are good radiators of heat
  3. They are good insulators of heat
  4. They are not important for heat transfer

A thermos flask keeps things close to their original temperature by reducing:

  1. Conduction
  2. Convection
  3. Radiation
  4. All of these

Thermal energy can be transferred by:

  1. Conduction
  2. Convection
  3. Radiation
  4. All of these

When light changes in direction when entering one transparent medium to another is known as?

  1. Reflection
  2. Diffraction
  3. Refraction
  4. Absorption

Rainbow is formed due to:

  1. Emission of light
  2. Absorption of light
  3. Refraction of light
  4. Transmission of sound

The angle of incidence of a ray for which the angle of refraction is 90° is called:

  1. Refracted Angle
  2. Critical Angle
  3. Incident Angel
  4. Angle of Deviation

Total internal reflection of light is possible when light enters from:

  1. Air to water
  2. Glass to glass
  3. Water to air
  4. Air to glass

Reflecting prisms usually work on the principle of total:

  1. Internal Reflection
  2. External Reflection
  3. Refraction
  4. Diffraction

Periscope is another optical instrument that works on the principle of total:

  1. Refraction
  2. Diffraction
  3. External Reflection
  4. Internal Reflection

Binocular work on the principle of which one of the following?

  1. Refraction of Light
  2. Diffraction of Light
  3. Total Internal Reflection of Light
  4. Transmission of Sound

A binocular uses _____ prisms to see distant objects.

  1. Porro
  2. Schmidt
  3. Fresnel
  4. Kepler

Which prism in one of the most commonly used dispersive prisms?

  1. Rectangular
  2. Triangular
  3. Square
  4. Pentagonal

The splitting of white light into its component colours is called:

  1. Refraction of light
  2. Reflection of light
  3. Dispersion of light
  4. Diffraction of light

When light passes through prism _____ occurs to form spectrum.

  1. Refraction
  2. Reflection
  3. Diffraction
  4. None

The primary colors of light are:

  1. 2
  2. 3
  3. 4
  4. 5

The band of seven colours is called:

  1. Prism
  2. Rainbow
  3. Lightwave
  4. Spectrum

Rainbow is the best example of:

  1. Refraction of light
  2. Dispersion of light
  3. Spectrum of white light
  4. Reflection of light

The colour of an opaque or non-luminous object is the colour of light it:

  1. Absorbs
  2. Reflects
  3. Transmits
  4. Refracts

When an object reflects the entire component colours of light, it appears:

  1. White
  2. Black
  3. Green
  4. Dark

If an object absorbs all seven colours of light, it appears in ____ colour.

  1. White
  2. Black
  3. Dark
  4. Green

When sound wave travels from one place to another, what is transported?

  1. Matter
  2. Momentum
  3. Energy
  4. Velocity

Sound waves travel in solvents in the form of:

  1. Transverse Waves
  2. Longitudinal Waves
  3. Electromagnetic Waves
  4. Mechanical Waves

In a transverse wave, the ___ is the distance b/w its two adjacent crests or troughs?

  1. Wavelength
  2. Frequency
  3. Amplitude
  4. Velocity

Wavelength symbol “λ” is termed as:

  1. Delta
  2. Gamma
  3. Omega
  4. Lambda

Decibel (dB) is the unit of measurement of:

  1. Amplitude
  2. Wavelength
  3. Pitch
  4. None

The number of vibrations produced by a vibrating body in a second is called?

  1. Velocity
  2. Amplitude
  3. Frequency
  4. Wavelength

The fundamental frequency of a guitar is string 220 Hz, the frequency of the second harmonic is?

  1. 220 Hz
  2. 440 Hz
  3. 320 Hz
  4. 620 Hz

Which of the following harmonics is two octaves higher in pitch than the fundamental?

  1. Second
  2. Third
  3. Fourth
  4. Fifth

The velocity of a wave is equal to:

  1. Wavelength x Frequency
  2. Wavelength / Frequency
  3. Frequency / Wavelength
  4. Wavelength + Frequency

Sound travels fastest in:

  1. Air
  2. Water
  3. Diamond
  4. Steel

Sound travels slowest in which one of the following?

  1. Air
  2. Water
  3. Steel
  4. Diamond

The speed of the sound in air is:

  1. 143 m/s
  2. 243 m/s
  3. 343 m/s
  4. 443 m/s

The speed of the sound in diamond is:

  1. 6000 m/s
  2. 12000 m/s
  3. 9000 m/s
  4. 15000 m/s

The characteristic of sound by which we can differentiate between shrill and grave sound is:

  1. Loudness
  2. Timbre
  3. Tone
  4. Pitch

The meaning of Echoes is:

  1. Repeating sounds
  2. Refracted sounds
  3. Absorbed sounds
  4. Amplified sounds

The audible range of normal human ear is:

  1. 16 Hz to 20kHz
  2. 10 Hz to 31kHz
  3. 67 Hz to 45kHz
  4. 20 Hz to 20kHz

The audible range of normal elephant ear is:

  1. 16 Hz to 20kHz
  2. 10 Hz to 31kHz
  3. 67 Hz to 45kHz
  4. 20 Hz to 20kHz

The audible range of normal whale ear is:

  1. 16 Hz to 20kHz
  2. 10 Hz to 31kHz
  3. 67 Hz to 45kHz
  4. 20 Hz to 20kHz

The audible range of normal dog ear is:

  1. 16 Hz to 20kHz
  2. 10 Hz to 31kHz
  3. 67 Hz to 45kHz
  4. 20 Hz to 20kHz

The audible range of normal cat ear is:

  1. 10 Hz to 31kHz
  2. 67 Hz to 45kHz
  3. 20 Hz to 20kHz
  4. 45 Hz to 64kHz

The audible range of normal dolphin ear is:

  1. 20 Hz to 120 kHz
  2. 20 Hz to 20 kHz
  3. 20 Hz to 100 kHz
  4. 20 Hz to 50 KHz

The audible range of normal bat ear is:

  1. 20 Hz to 120 kHz
  2. 20 Hz to 20 kHz
  3. 20 kHz to 110 kHz
  4. 20 Hz to 50 KHz

The rate of flow of charge at certain point is called:

  1. Voltage
  2. Current
  3. Resistance
  4. Power

The movement of free electrons is called:

  1. Electric Field
  2. Electric Potential
  3. Electric Current
  4. Electric Charge

The circuit that provides only one path for the current is called?

  1. Series Circuit
  2. Parallel Circuit
  3. Short Circuit
  4. Open Circuit

Two bulbs are connected in a series circuit. One bulb blows (blast), what will happen to the other bulb?

  1. Will glow brighter
  2. Also blow (blast)
  3. Remains same
  4. Will glow dimmer

The circuit that provides two or more paths for the current is called?

  1. Series Circuit
  2. Short Circuit
  3. Parallel Circuit
  4. Open Circuit

A voltmeter is always connected in a circuit in:

  1. Series
  2. Parallel
  3. Both A and B
  4. None

Electric current is measured by:

  1. Ammeter
  2. Voltmeter
  3. Ohmmeter
  4. Multimeter

The circuits in most businesses places and homes are connected in:

  1. Series
  2. Parallel
  3. Both A and B
  4. None

The hindrance to the flow of current is called?

  1. Conductance
  2. Inductance
  3. Resistance
  4. Capacitance

Stars are huge balls of gas mainly consist of ____ and:

  1. Oxygen, Nitrogen
  2. Helium, Oxygen
  3. Hydrogen, Helium
  4. Nitrogen, Carbon

Star gets denser and hotter ultimately changing into helium by process of:

  1. Nuclear fusion
  2. Nuclear Fission
  3. Radioactive decay
  4. Chemical reaction

Our Sun is a star and is the closest star to Earth. The next closer star to Earth is known as:

  1. Sirius
  2. Orion
  3. Alpha Centauri
  4. Andromeda

Colours of stars are due to their:

  1. Temperature
  2. Size
  3. Distance
  4. Composition

The coolest stars are the red stars and their temperature is around:

  1. 2000°C
  2. 3000°C
  3. 4000°C
  4. 5000°C

In which color the coolest stars are appeared?

  1. Blue
  2. Yellow
  3. Red
  4. White

The Sun has temperature of around 6,000 °C and glows:

  1. Red
  2. Blue
  3. Green
  4. Orange/Yellow

The Sun has temperature of around:

  1. 3000 °C
  2. 6000 °C
  3. 4000 °C
  4. 5000 °C

The hottest stars are the blue stars and their temperature is around:

  1. 25000°C
  2. 20000°C
  3. 15000°C
  4. 10000°C

Which one of the following stars are hotter than red and orange stars?

  1. Green
  2. Dark
  3. Blue
  4. Yellow

What causes the stars in space to absorb and scatter starlight that resulting in a reduction in their brightness?

  1. Planets and Moons
  2. Asteroids and Comets
  3. Black Holes and Neutron Stars
  4. Dust and Gas

The earth is part of a galaxy called?

  1. Andromeda Galaxy
  2. Triangulum Galaxy
  3. Milky Way Galaxy
  4. Pinwheel Galaxy

Our galaxy is _____ in shape.

  1. Irregular
  2. Spiral
  3. Elliptical
  4. Circular

How many light years the earth and sun are away from the center of Milky Way galaxy?

  1. 27000
  2. 23000
  3. 20000
  4. 25000

How many years our solar system takes to one orbit around Milky Way galaxy?

  1. 250
  2. 225
  3. 300
  4. 275

Light reaches us from the Sun is about 8 minutes and from Sirius in about:

  1. 8 minutes
  2. 8 days
  3. 8 months
  4. 8 years

Nebulae are made up of:

  1. Oxygen (97%) and Nitrogen (3%)
  2. Hydrogen (97%) and Helium (3%)
  3. Carbon (50%) and Nitrogen (50%)
  4. Helium (97%) and Hydrogen (3%)

A region of space where matter has collapsed in on itself is called a?

  1. White Dwarf
  2. Wormhole
  3. Black Hole
  4. Neutron Star

A group of stars in the sky that, when viewed from Earth, create an outline of some recognizable shape or pattern is called:

  1. Constellation
  2. Nebula
  3. Asterism
  4. Galaxy

A telescope is an instrument that gathers ____from distant sources.

  1. Sound
  2. Light
  3. Heat
  4. Water

Who invented the telescope?

  1. Isaac Newton
  2. Albert Einstein
  3. Galileo Galilei
  4. Johannes Kepler

ECG is used for the diagnosis of the ailment of the:

  1. Brain
  2. Heart
  3. Liver
  4. Kidneys

Read More: General Science MCQs for all class and competitive exams test preparation.

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