Question # 1

The total number of protons in 10 g of calcium carbonate is (N₀= 6.023 x 10²³)

Choose an answer

1.5057 x 10²⁴

2.0478 x 10²⁴

3.0115 x 10²⁴

4.0956 x 10²⁴

The number of unpaired electrons in the p-subshell of oxygen atom

Choose an answer

1

2

3

4

Octane number can be changed by

Choose an answer

Isomerisation

alkylation

Cyclisation

All of these

Which one is not usually used for the crystallization?

Choose an answer

Acetone

Acetic acid

Sulphuric acid

Chloroform

The total pressure exerted by a number of non-reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

Choose an answer

Boyle's law

Charle's law

Avogadro's law

Dalton's law

Which of the following process is used to separate insoluble particles from liquids?

Choose an answer

Seperation

Filtration

Crystallization

Condensation

Which of the following belongs to the halogen family?

Choose an answer

Francium

Polonium

Radium

Astatine

How many kinds of space lattices are possible in a crystal?

Choose an answer

23

7

230

14

Which of the following value ofΔHf represent that product is least stable?

Choose an answer

-94.0 kcal mol^-1

-231.6 kcal mol^-1

+21.4 kcal mol^-1

+64.8 kcal mol^-1

Each of following is true of white and red phosphours except that they

Choose an answer

Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

Which one is the property of an ideal solvent?

Choose an answer

Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

The weight of 11.2 litres of CO₂at S.T.P. would be

Choose an answer

88 g

44 g

32 g

22 g

Which of the following statement regarding catalyst is not true?

Choose an answer

A catalyst remains unchanged in composition and quantity at the end of the reaction

A catalyst can initiate a reaction

A catalyst dose not alter the equilibrium in a reversible reaction

Catalysts are sometimes very specific in respect of reaction.

For the carbylamine reaction we need hot alc. KOH and

Choose an answer

Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

Choose an answer

Functional isomers

Position isomers

Chain isomers

Metamers

If N_Ais Avogadro's number, then number of valence electrons in 4.2 g of nitride ions N^3-is

Choose an answer

2.4 N_A

4.2 N_A

1.6 N_A

3.2 N_A

Which of the following cannot be produced by acidic dehydration of alcohols?

Choose an answer

Ethers

Aldehyde

Alkyl Hydrogen sulphate

Alkene

In Friedal-Craft's alkylation besides AlCl₃the other reactants are

Choose an answer

C6H6 + NH3

C6H6 + CH4

C6H6 + CH3Cl

C6H6 + CH3COCl

Which of the following does not reflect the periodicity of elements?

Choose an answer

Bonding begaviour

Electronegativity

Ionisation potential

Neutron/proton ratio

The wire in the flash bulbs is made up of

Choose an answer

Mg

Ba

Cu

Ag

Reaction of acids with alcohols is also known as

Choose an answer

Esterification

Saponification

Alkalization

None

More Classes

Other Links

NAT II Physical Science Chemistry MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer