Chemistry Class 10th MCQs

Chemistry Class 10th MCQs with answers for matriculation paper preparation online.

Chemistry Class 10th MCQs

For which system does the equilibrium constant, Kc has units of concentration:

1. N2(g) + 3H2(g) ⇌ 2NH3(g)
2. N2(g) + 02(g) ⇌ 2NO
3. H2(g) +12(g) ⇌ 2HI(g)
4. CO2(g) + H3(g) ⇌ CO + H2O(l)

The unit of Kc for reaction N2 + O2 ⇌ 2NO:

1. mol dm^-3
2. mol^-2 dm^6
3. mol^-1dm3
4. No unit

The system is stable in equilibrium when:

1. Qc = Kc
2. Qc > Kc
3. Qc < K
4. None of these

Qc can be defined as:

1. Ratio of product and reactants
2. Ratio of molar concentration of product
3. Ratio of molar concentration of product and reactant raised to the power of coefficient

The value of Kc increases when:

1. [Product] is less
2. [Product] is more
3. [Reactant] is more
4. [Reactant = product]

Corrosive effect on skin is caused by:

1. Acid
2. Base
3. Salt
4. Both a & b

Preservatives are used to preserve:

1. Acids
2. Bases
3. Food
4. Water

Which of the following is not an Arrhenius acid:

1. HCl
2. CO2
3. HNO3
4. H2SO4

NH3 can be a base according to:

1. Arrhenius theory
2. Bronsted-Lowery theory
3. Lewis theory
4. Both b and c

Which of the following is a Lewis base:

1. HNO3
2. CN
3. HCl
4. AlCl3

How much percentage of water on the earth is freshwater:

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

A substance that can donate a pair of electron to form coordinate covalent bond:

1. Lewis acid
2. Lewis base
3. Bronsted — Lowery acid
4. Bronsted – Lowery base

Salt among following is:

1. HCl
2. KCl
3. HNO3
4. H2SO4

Substances that react with both acids and bases are called:

1. Conjugate acids
2. Conjugate bases
3. Amphoteric substances
4. Buffers

The general formula for alkanes is:

1. CnH2n
2. CnH2n+1
3. CnH2n+2
4. CnH2n-1

Which of the following is an alcohol:

1. CH3-CHO
2. CH3-CH2-O-CH3
3. CH3-OH
4. HCOOH

Which of the following is a saturated hydrocarbon:

1. CH3-CH=CH2
2. CH3-CH2-CH3
3. CH3-C=CH
4. CH2=CH-C=CH

The prefix ‘hept’ stands for the ____ carbon atoms:

1. 2
2. 5
3. 7
4. 9

The functional group -COOH is used for:

1. Alkynes
2. Alcohols
3. Phenols
4. Carboxylic acids

Polyethene is:

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

Acetic acid is obtained from:

1. Banana
2. Dates
3. Garlic
4. Vinegar

The reaction in which an acid and a base react to form salt and water only is known as _______ reaction:

1. Neutralization
2. Ionization
3. Oxidation
4. Decomposition

Alkenes:

1. Show the same general formula as alkynes
2. Have carbon-carbon triple bond
3. Have carbon-carbon double bond
4. Are saturated hydrocarbons

CH3-CH2- is _____ radical:

1. Methyl
2. Ethyl
3. n-propyl
4. Isopropyl

Glucose is:

1. Vitamin
2. Protein
3. Carbohydrate
4. Lipid

______ encodes genetic information:

1. RNA
2. DNA
3. Progesterone
4. Cholesterol

The carbohydrates which contain the aldehyde group are called:

1. Saccharides
2. Ketoses
3. Pentoses
4. Aldoses

Amino acids are building blocks of:

1. Nucleic acids
2. Protein
3. Vitamins
4. Lipid

Which one of the following is a polysaccharide:

1. Fructose
2. Maltose
3. Starch
4. N.O.T

Lactose is:

1. Grape sugar
2. Honey sugar
3. Milk sugar
4. Cane sugar

What is true about a peptide:

1. It is a protein
2. It is an anhydride of carboxylic acids
3. It is an anhydride of an amine
4. It is a polyamide

Fats are solids at:

1. Ordinary room temperature
2. High temperature
3. Higher than 50°C temperature
4. N.O.T

The branch of Chemistry which deals with hydrocarbons:

1. Industrial chemistry
2. Inorganic chemistry
3. Organic chemistry
4. Physical chemistry

Cotton contains ______ cellulose:

1. 30%
2. 65%
3. 85%
4. 95%

Second highest layer of Earth’s atmosphere is:

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere

Aeroplanes fly in:

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere

Atmospheric pressure decreases with the:

1. Increase in longitude
2. Decrease in altitude
3. Increase in altitude
4. Increase in latitude

Layer of atmosphere which separates stratosphere and troposphere is known as:

1. Tropo-pause
2. Mesopause
3. stratopause
4. Thermopause

Ozone layer is part of:

1. Mesosphere
2. Stratosphere
3. Thermosphere
4. Troposphere

Which is not part of greenhouse gases:

1. Carbon dioxide
2. Methane
3. Nitrous oxide
4. Oxygen

Second most abundant constituent of dry air in terms of volume after nitrogen is:

1. Nitrogen
2. Oxygen
3. Argon
4. Carbon Dioxide

Which of the following is the reason of global warming:

1. Presence of sulphite
2. Rise in CO2 concentration
3. Oxides of nitrogen
4. Formtion of ozone

The altitude on stratosphere is:

1. 40 to 45 km
2. 50 to 55 km
3. 60 to 65 km
4. 70 to 75 km

Which one of the following statements is false about dynamic equilibrium:

1. It takes place in a close container
2. Concentration of reactant and products are not changed
3. Rate of forward reaction is equal to rate of reverse reaction
4. Equilibrium cannot be disturbed by any external stress

Ozone is a gas found in the layer:

1. Troposphere
2. Mesosphere
3. Stratosphere
4. Exosphere

Which of the following water borne diseases is of viral origin:

1. Typhoid fever
2. Polio
3. Dysentery
4. Diarrhea

How much percentage (%) of the Earth’s Surface is covered with water:

1. 70%
2. 60%
3. 90%
4. 75%

Which type of bond is formed between H₂O molecules:

1. Hydrogen bond
2. Ionic bond
3. Covalent bond
4. All of these

The permanent hardness of water is due to presence:

1. MgSO4
2. Mg(HCO3)₂
3. CA(HCO3)2
4. All of these

Which salts are excessively dissolved to make temporary hard water:

1. CaSO4 and CaCl2
2. KNO3 and KOH
3. CaCO3 and Ca(OH)2
4. Ca(HCO3)2 and Mg(HCO3)2

Water is a:

1. Polar solvent
2. Non-polar solvent
3. Amphiphatic solvent
4. Non-polar charged solvent

The taste of water is:

1. Sour
2. Bitter
3. Sweet
4. Tasteless

Which of the following is helpful for removal of permanent hardness:

1. Na2CO3
2. Ca(OH)2
3. CaCO2
4. Na2SO4

The Analytical Chemistry deals with instruments and methods to ___identify and quantify the matter:

1. Mix
2. Separate
3. Differentiate
4. Manipulate

A reaction which is never goes to completion is known as reversible reaction. Reversible reaction is represented by:

1. Doted lines
2. Single arrow
3. Double arrow
4. Double straight line

The sample may be solid, liquid, gas or a _______ in qualitative analysis:

1. Mixture
2. Compound
3. Differentiate
4. Substance

Analysis deals with the identification of presence of functional groups in compounds is:

1. Physical qualitative analysis
2. Analytical qualitative analysis
3. Organic qualitative analysis
4. Inorganic qualitative analysis

Flame test of Copper Halide with bluish-green color identify the presence of:

1. Halogen
2. Hydrogen
3. Copper
4. B and C

The physical methods used to measure physical properties is called:

1. Combustion analysis method
2. Volumetric analysis method
3. Atomic emission spectroscopy method
4. Gravimetric analysis method

The error caused by improper functioning of instrument is:

1. Determinant Error
2. Systematic Error
3. Indeterminant
4. A and B

An agreement between a measured value and the accepted true value:

1. Error
2. Accuracy
3. Precision
4. All of these

Spectroscopy is the interaction of light with:

1. Liquid
2. Solid
3. Gas
4. Matter

The Gas is mobile phase in:

1. Liquid chromatography
2. Solid chromatography
3. Gas chromatography
4. None of these

It used to assess concentration or amount of given atomic, molecular or ionic chemical:

1. Chromatography
2. Conductometry
3. Spectroscopy
4. Potentiometry

Soap is the term for a salts of a:

1. Carboxylic acid
2. Citric acid
3. Sulphuric acid
4. Fatty acid

When the magnitude of Kc is small, indicates:

1. Reaction mixture contain most of the reactant
2. Reaction mixture contain most of the product
3. Reaction mixture contain almost equal amount of reactant and product
4. Reaction goes to completion

Surfactants reduce the ______ of water:

1. Viscosity
2. Surface tension
3. Boiling point
4. Melting Point

If pH value is greater than 7, then solution is:

1. Acidic
2. Basic
3. Amphoteric
4. Neutral

The carboxylate end of the soap molecule that is attracted to water is called:

1. Hydrophobic end
2. End point
3. Hydrophilic end
4. None

The use of potassium hydroxide produced a:

1. Hard soap
2. Soft soap
3. Moderate soap
4. All of these

The citric acid is used in preparation of cold drinks for:

1. Sweet taste
2. Bitter taste
3. Sour taste
4. Salty taste

The centrifuge machine used for separation of:

1. Juice
2. pH
3. Mud
4. Crystal

The abrasives are:

1. Water
2. Water insoluble minerals
3. Water semi soluble minerals
4. Water absorving minerals

The harvesting is most important step of:

1. Preparation of soap
2. Preparation of cold drinks
3. Preparation of sugar
4. Preparation of medicines

Which of the following is used as jet fuel:

1. Kerosene oil
2. Fuel oil
3. Petrol
4. Diesel oil

Which one of the following is not a fraction of crude oil:

1. Petroleum coke
2. Ammonia
3. Fuel oil
4. Paraffin wax

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