Chemistry MCQs ( NTS CSS SPSC )

Chemistry MCQS for preparation. ( ARID PMS AJKPSC )

Number of carbon atoms in valeric acid are?

A. 4
B. 5
C. 6
D. 7

In conversion of acid halides to ester, pyridine is used to?

A. Stabilize Acid Halides
B. Consume HCl formed in the reaction
C. Dehydrate Alcohol
D. None of these

Propylene glycol and trimethylene glycol are?

A. Functional Group Isomers
B. Metamers
C. Position Isomers
D. Tautomers

When phenol reacts with excess of bromine in aqueous solution it reacts in the formation of?

A. Ortho/para Bromophenol
B. Meta bromophenol
C. 2,4,5-Tribromophenol
D. 3,5-O bromophenol

Identify the electrophile called as acylium ion?

A. R3N+
B. RCO+
C. RCOO+
D. RNO+

Consider the reaction below, if 5 moles each of hydrogen and oxygen are reacted to form water, the reaction reveals? 2H2 + O2 __> 2H2O

A. H2 is excess reagent
B. O2 is limiting reagent
C. H2 is limiting reagent
D. Reaction has no limiting reagent

When aqueous solution of NaCl is electrolysed?

A. Cl2 is evolved at the cathode
B. H2 is evolved at cathode
C. Na is deposited at the cathode
D. Na appears at the nodes

What is the common name of 1,2,3 propanetriol?

A. Butyl Alcohol
B. Glycol
C. Glycerol
D. Propyl alcohol

Which order of reaction obeys the expression 11/2 = 1/ka?

A. Zero
B. First
C. Second
D. Thire

Which of the following is not an endothermic reaction?

A. Combustion of Methane
B. Decomposition of Water
C. Dehydrogenation of ethane or ethylene
D. Conversion of graphite to diamond

Why do electrons have opposite spins when they are in the same orbital?

A. This condition reduces friction
B. This condition creates more energy
C. This condition results in zero magnesium and removes the change of the electron


D. This condition results in loss repulsion and opposite magnetic fields

What is the reactivity state of Phenols?

A. Less Reactive
B. More reactive
C. Neutral
D. Nonreactive

Which of the following acid can show Cis-trans isomerism?

A. Malonic Acid
B. Maleic Acid
C. Succinic Acid
D. Lactic Acid

Air at sea level is dense. This is practical application of?

A. Boyles Law
B. Charles Law
C. Avogadros Law
D. Daltons Law

Which functional group is characteristics of ester?

A. R-OR
B. R-CO-R
C. R-CO-OR
D. R-CO-OH

The hydrocarbon which has isolated rings and is aromatic?

A. Phenanthrene
B. Triphenylmethane
C. Diphenylether
D. Anthracene

When equal moles of reactant A and B are allowed to react according to the following balanced equation (2 A + B __> Product). The limiting reactant in this chemical equation will be?

A. Reactant A
B. Reactant B
C. Reactant A and B
D. No Limiting Reactant

The polar part of the soap and detergents dissolve in water molecules due to?

A. Dipole – Dipole Forces
B. Dipole – Induced dipole forces
C. Hydrogen Bonding
D. London Dispersion Forces

The solubility of carboxylic acid in water gradually decreases with?

A. Decreases in molecular massB. Increases in molecular massC. Increases the amount of acidD. Decreases the amount of water

The solubility of carboxylic acid in water gradually decreases with?

The solubility of carboxylic acid in water gradually decreases with?

A. Decreases in molecular mass
B. Increases in molecular mass
C. Increases the amount of acid
D. Decreases the amount of water

The solubility of carboxylic acid in water gradually decreases with?

A. Decreases in molecular massB. Increases in molecular massC. Increases the amount of acidD. Decreases the amount of water

The solubility of carboxylic acid in water gradually decreases with?

A. Decreases in molecular mass
B. Increases in molecular mass
C. Increases the amount of acid
D. Decreases the amount of water

The solubility of carboxylic acid in water gradually decreases with?

A. Decreases in molecular mass
B. Increases in molecular mass
C. Increases the amount of acid
D. Decreases the amount of water

Which of the following is not true about Canal rays?

A. 1.6726 x 10-27 kg
B. 9.54 x 103 C/kg
C. Show deflection under electric & magnetic fields
D. Do not cause mechanical motion

he power of combining of an atom with other atom to form molecule or compound is called?

A. Density
B. Valency
C. Electron Affinity
D. Electronegativity

The process in which acid is mixed with base, and then a salt and water are formed is called?

A. Combustion
B. Neutralization
C. Addition
D. Condensation

The position of an element in a periodic table is determined by its ___?

A. Awagadro Number
B. Atomic Number
C. Atomic Mass
D. Proton Number

The position of an element in a periodic table is determined by its ___?

A. Awagadro Number
B. Atomic Number
C. Atomic Mass
D. Proton Number

Miscible liquids that have different boiling points can be separated by:

A. Filtration
B. Decanting
C. Distillation
D. None of these

Which of the following liquid has high vapor pressure than other liquids?

A. CH3OH
B. C2H5OH
C. H2O
D. Ether

Which of the liquid has higher boiling point than other liquids?

A. HCl
B. H2O
C. HBr
D. Br2

Which of the following liquid is more volatile?

A. Benzene
B. Water
C. Honey
D. None of these

What is the Vapor Pressure of water at different temperature?

A. Low
B. High
C. Same
D. Different

Which of the following gas diffuses more rapidly?

A. H2
B. O2
C. So3
D. NH3

Which of the following at ordinary temperature the most nearly ideal gases are?

A. He
B. N2
C. H2
D. All of these

When a compressed gas is allowed to pass through a nozzle of a jet into a region of low pressure it produces?

A. Fusion
B. Cooling
C. Expansion
D. Vaporization

Which of the value is designed as absolute zero or zero of the Kelvin scale?

A. -273.15 ˚C
B. -173.15 ˚C
C. 273.15 ˚C
D. None of these

From the following one atmosphere pressure is equal to how many Pascal?

A. 101325
B. 15.8
C. 760
D. None of these

Synthetic detergents are made from:

A. Sodium palmitate
B. Sodium stearate
C. Sodium salt of benzene sulphonic acid
D. Sodium salt of benzene carboxylic acid

The pair of compound used as anesthetic in medicines:

A. Nitrogen dioxide, ether
B. Nitrous oxide, chloroform
C. Ether, ammonia
D. Chloroform, Nitrogen dioxide

Ultra purification of a metal is done by:

A. Zone melting
B. Slugging
C. Leaching
D. Smelting

Carbon footprint can be reduced by:

A. Commuting by public transport
B. Recycling waste material
C. Using energy-efficient appliances
D. All of these

Aluminium salt commonly used to stop bleeding is:

A. Potash alum
B. Aluminium chloride
C. Aluminium nitrate
D. Aluminium Sulphate

The deterioration of a metal by an electrochemical process is commonly termed as:

A. Abrasion
B. Corrosion
C. Erosion
D. Passivation

Which one of the following is not a coal variety?

A. Peat
B. Lignite
C. Dolomite
D. Bituminous

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