Chemistry Preparation

Ozone depletion causes ?

A. Blood Cancer

B. Skin Cancer

C. Malaria

D. T.B

Enzymes are made of ?

A. Protein

B. Lipids

C. Fats

D. Minerals

The pH of the acid rains is less than ?

A. 5.6

B. 5.3

C. 6.9

D. 3.6

The substance which increases the rate of chemical reaction is

A. Metal

B. Catalyst

C. Alloy

D. Enzymes

The coldest region in atmosphere is ?

A. Mesopause

B. Stratosphere

C. Tropopause

D. Stratopause

Lower the pH value _________ will be an acid.

A. Weaker

B. Neutral

C. Stronger

D. Alkaline

Urea is probably, most important fertilizer ?

A. Nitrogenous

B. Sulphur

C. Organic

D. Phosphate

______________ is a factor related to blood clotting.

A. Vitamin K

B. Vitamin A

C. Vitamin C

D. Vitamin E

There are __________ types of DNA.

A. 1

B. 2

C. 3

D. 4

The branch of chemistry in which we study hydrocarbon and their derivatives is called ?

A. Organic chemistry

B. Inorganic chemistry

C. Industrial chemistry

D. Biochemistry