Chemistry MCQs

Question 1

The depletion of Ozone layer is mainly due to

Accepted Answer

Chlorofluorocarbons

Answer

Volcanic eruptions

Answer

Aviation fuels

Answer

Radioactive rays

Question 2

Chemical name of vinegar is

Accepted Answer

Acetic acid

Answer

Acetone

Answer

Formaldehyde

Answer

Ethanol

Question 3

Which one of the following organic compounds has fruity smell?

Accepted Answer

Ester

Answer

Alcohol

Answer

Aldehyde

Answer

Ether

Question 4

The first organic compound synthesised in the laboratory was

Accepted Answer

Urea

Answer

Uric acid

Answer

Lactic acid

Answer

Glucose

Question 5

Among the following, carbonate ore of Zinc is

Accepted Answer

Calamine

Answer

Zinc blende

Answer

Sphalerite

Answer

Zincite

Question 6

The metal used for making aircrafts and rockets is

Accepted Answer

Aluminium

Answer

Lead

Answer

Nickel

Answer

Copper

Question 7

The compound that has the least value for octane number is :

Accepted Answer

N-heptane

Answer

2-methyl heptane

Answer

Iso-octane

Answer

2,2-dimethyl hexane

Question 8

The length of double bond is _______ than single bond.

Accepted Answer

Shorter

Answer

Longer

Answer

Of same lenght

Answer

None of the above

Question 9

An example of heterocyclic compound is

Accepted Answer

Furan

Answer

Naphthalene

Answer

Benzene

Answer

Anthracene