7000+ Science and Technology Questions for UPSC Mains, Prelims Pdf - 1

Question: 1

Vulcanisation is

(A) Process of hardening of rubber by heating with sulphur

(B) Process connected with the making of voltaic cells

(C) Method to degrade polymers

(D) Science of studying volcanoes

Question: 2

Alcoholic beverages contain

(A) Butyl alcohol

(B) Ethyl alcohol

(C) Methyl alcohol

(D) Methanol

Question: 3

The stars twinkle in the night because

(A) The earth’s atmosphere absorbs light intermittently

(B) The refractive index of the air in atmosphere fluctuates

(C) The star’s atmosphere absorbs light intermittently

(D) They emit light intermittently

Question: 4

Oranges are rich sources of

(A) Vitamins

(B) Proteins

(C) Fats

(D) Carbohydrates

Question: 5

The chief nitrogenous waste in humans is

(A) Ammonium nitrate

(B) Ammonia

(C) Uric acid

(D) Urea