Question # 1

Water (H2O) is liquid while hydrogen sulphide (H₂S) is a gas because

Choose an answer

Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphur has high electronegativity than oxygen

Water molecules associate through hydrogen bonding.

Fertilizer are made by

Choose an answer

Nature only

Artificial methods only

Both artificial and natural methods

None of the above

The number of oxygen atoms in 4.4 g of CO₂ is approximately

Choose an answer

1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

In the manufacture of iron from haematite,limestone is added to act as.

Choose an answer

Flux

A reducing

Slag

An oxidizing agent.

One mole of a gas refers to

Choose an answer

The number of molecules in one litre of gas

The number of molecules in one gram of gas

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 liters of a gas at S.T.P.

Which of the following is a molecular disease?

Choose an answer

Allergy

Cancer

German measles

Sickle cell anemia

Salol is prepared from

Choose an answer

Salicylic acid and phenol

Salicylic acid and methyl alcohol

Both

None

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

Carbon monoxide is pollutant as it

Choose an answer

Inactivates nerves

Inhibits glycolysis

Combines with oxygen

Combines with hemoglobin

At room temperature formaldehyde is

Choose an answer

Gas

Liquid

Solid

None of the above

Which is the most volatile compound?

Choose an answer

HI

HCI

HBr

HF

Inter molecular forces in solid hydrogen are

Choose an answer

Covalent forces

Van der Waal forces or London dispersion forces

Hydrogen bonds

All of these.

The rate of reaction between A and B increases by a factor of 100, and when the concentration with respect to A is increased 10 folds, the order of reaction w.r.t. A is

Choose an answer

10

1

4

2

The chemical composition of white lead is

Choose an answer

Na₂CO₃

Pb₃O₄

Pb(OH)₂.2PbCO₃

PbO

Propyne on hydrolysis is presence of H₂SO₄and HgSO_{4 gives}

Choose an answer

Acetaldehyde

Acetone

Formaldehyde

None

The number of atoms contained in 11.2 L of SO₂at S.T.P are

Choose an answer

3/2 x 6.02 x 10²³

2 x 6.02 x 10²³

6.02 x 10²³

4 x 6.02 x 10²³

Which has largest first ionization energy?

Choose an answer

Li

Na

K

Rb

Which of the following has no tin in its composition?

Choose an answer

Solder

Bronze

Brass

Tin stone

Which of the following is not present in RNA?

Choose an answer

Uracil

Thymine

Ribose

Phosphate

Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?

Choose an answer

HCl + anhyd. ZnCl₂

NaCl

PCl₅

SOCl₂

Hess's law deals with

Choose an answer

Changes in heat or reaction

Rate of reaction

Equilibrium constant

Influence of pressure on volume of a gas.

All the naturally occurring processes proceed spontaneously in a direction which lead to

Choose an answer

Decrease of entropy

Increase of enthalpy

Increase of free energy

Decrease of free energy

More Classes

Other Links

Chemistry General Science Test Hard Mode 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

Choose an answer