Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Threshold limit value of copper in the atmospheric air is -
a. 0.001 mg/m3
b. 0.01 mg/m3
c. 1.0 mg/m3
d. 5.0 mg/m3
Q. Silicone is a polymer of –
a. Tetraalkyl silane
b. Silicon tetrachloride
c. Dialkyl dichloro silane
d. Silane
Q. Which is not an anasthetic agent in surgical operations?
a. Chloroform
b. Ether
c. Nitrous oxide
d. Acetone
Q. Iron is prevented from rusting by coating with zinc. This process is called as –
a. Galvanisation
b. Corrosion
c. Sublimation
d. Reduction
Q. Chemical that is used in photography -
a. Copper sulphate
b. Silver bromide
c. Magnesium sulphate
d. None
Q. Sodium Carbonate is commonly known as -
a. Baking Soda
b. Washing Soda
c. Caustic Soda
d. Caustic Potash
Q. When a bond is formed between two atoms, the energy of the sys-tem will –
a. increase
b. decrease
c. remain the same
d. may increase or decrease
Q. Which of the following molecules or ions involved in the Nitrogen Cycle do not contain oxygen atom?
a. Nitrite
b. Ammonia
c. Nitrate
d. Laughing gas
Q. Which of the following is used as a coolant in nuclear reactors?
a. Heavy water
b. Cadmium
c. Liquid sodium
d. Graphite
Q. lodex, a pain relief balm, has the smell of .
a. Methyl salicylate
b. Ethyl salicylate
c. Propyl salicylate
d. Butyl salicylate
Q. A complex compound in which the oxidation number of a metal is zero is -
a. K4 [Fe (CN)6]
b. K3 [Fe (CN)6]
c. [Ni (CO)4]
d. [Pl (NH3)4]Cl2