Non-metals and their compounds

121.Due to which reaction carbon dioxide is produced in a normal fire extinguisher?
 
A. sodium carbonate and dilute HCI
 
B. sodium bicarbonate and dilute H₂SO₄
 
C. limestone and dilute H₂SO₄
 
D. Marble Powder and Dilute HCI
 
Option”B” is correct
122.fire extinguishing gas
 
A. hydrogen
 
B. oxygen
 
C. nitrogen
 
D. Carbon dioxide
 
Option”D” is correct
123.Which glass is used in the manufacture of electric bulb?
 
A. crown glass
 
B. pyrex glass
 
C. flint glass
 
D. fiber glass
 
Option”C” is correct
124.Which of the following is not a noble gas?
 
A. hydrogen
 
B. helium
 
C. Nian
 
D. organ
 
Option”A” is correct
125.Non-metals are generally poor conductors of electricity, but graphite is a good conductor of electricity because
 
A. it is a form of carbon
 
B. it has loosely bound electrons
 
C. it is brittle
 
D. It forms primary oxide
 
Option”C” is correct
126.The inert gas used as a beacon light is?
 
A. kr
 
B. Ar
 
C. He
 
D. no
 
Option”D” is correct
127.Which of the following acids is a mineral acid?
 
A. citric acid
 
B. hydrochloric acid
 
C. ascorbic acid
 
D. tartaric acid
 
Option”B” is correct
128.Phosphorus is found in abundance in
 
A. protein
 
B. fat
 
C. vitamins
 
D. none of these
 
Option”A” is correct
129.Which of the following is a supercooled liquid
 
A. ammonia
 
B. Ice Cream
 
C. wood
 
D. glass
 
Option”D” is correct
130.Crystalline is the crystalline form of which of the following
 
A. lime stone
 
B. glass
 
C. silica
 
D. alumina
 
Option”C” is correct