HPCL, IOCL Chemical Engineering Previous Year Question Papers - 2

Question: 6

The main component of Pyrex glass is

(A) boron

(B) selenium

(C) lead

(D) zinc

Question: 7

Calgon used in water treatment is chemically

(A) sodium hexametaphosphate

(B) sodium phosphate

(C) calcium phosphate

(D) tricresyl phosphate

Question: 8

The large use of sulphuric acid is in

(A) copper leaching

(B) fertilizer manufacture

(C) petroleum refining

(D) iron and steel pickling

Question: 9

Which of the following acids is used to the greatest extent for metal pickling?

(A) nitric acid

(B) phosphoric acid

(C) sulfuric acid

(D) hydrochloric acid

Question: 10

Which of the following is the purest form of water out of the following?

(A) lake water

(B) well water

(C) rain water

(D) underground water