Chemistry MCQs

Question 1

When a bond is formed between two atoms, the energy of the system will

Accepted Answer

Remain the same

Answer

Increase

Answer

Decrease

Answer

May increase or decrease

Question 2

The minimum energy required for an effective collision is

Accepted Answer

Activation energy

Answer

Threshold energy

Answer

Free energy

Answer

Internal energy

Question 3

Which of the following produces highest amount of energy upon oxidation?

Accepted Answer

Fat

Answer

Protein

Answer

Glucose

Answer

An alkane

Question 4

Which of the following has least negative electron gain enthalpy?

Accepted Answer

P

Answer

S

Answer

Cl

Answer

F

Question 5

Entropy of Universe is always

Accepted Answer

Increasing

Answer

Decreasing

Answer

Zero

Answer

Constant

Question 6

In a reaction of the type A+B -> C+D one could ensure it to be a first order reaction by :

Accepted Answer

Increasing the concentration of a reactant

Answer

Increasing the temperature

Answer

Increasing the concentration of a product

Answer

Adding a catalyst

Question 7

Kinetics is the study of:

Accepted Answer

All of these are correct

Answer

The rate of chemical reaction

Answer

How fast the reactions go

Answer

The mechanisms and paths of the molecules take in joining from one reactant to products

Question 8

Bhopal gas tragedy is associated with leakage of

Accepted Answer

Methyl isocyanate

Answer

Carbon dioxide

Answer

Nitrogen dioxide

Answer

Sulphur dioxide

Question 9

The function of sedimentation tank in sewage treatment is to:

Accepted Answer

Remove suspended solids

Answer

Disinfect the sewage

Answer

Remove water content

Answer

Aerate the sewage