TNPSC Group 4 Chemistry Model Question Paper 2019-2020 - 2

Question: 6

Butter is

(A) A molecular solid

(B) A super cooled oil

(C) An emulsion

(D) None of the above

Question: 7

Optical fibers are mainly used in

(A) Food Industry

(B) Musical Instruments

(C) Weaving

(D) Communication

Question: 8

The most commonly used chemicals in the artificial rain making or cloud seeding are

(A) Dry ice (Frozen co2)

(B) Sodium Chloride (NaCl)

(C) Silver Iodide (Agl)

(D) All the above

Question: 9

Which of the following acid is utilized in the photography?

(A) Acetic acid

(B) Citric acid

(C) Oxalic acid

(D) Formic acid

Question: 10

Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

(A) Carbon dioxide and methane

(B) Methane and air

(C) Oxygen and acetylene

(D) Hydrogen and oxygen