Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Which among the following is correct full form of DDT?
a. Dichloro-diethyl-trifluoromethane
b. Dichloro-diphenyl-trichloroethane
c. Dichloro-diphenyl-trichloromethane
d. Dipheneyl-dichloro-trichloromethane
Q. Which among the following sentences is true?
a. Ammophos is an organic fertilizer while Urea is an inorganic fertilizer
b. Ammophos is an inorganic fertilizer while Urea is an organic fertilizer
c. Both of them are organic fertilizers
d. Both of them are inorganic fertilizers
Q. Milk is a colloidal system in which:
a. Water is dispersed in fat
b. Fat is dispersed in water
c. Fat and water are dispersed in each other
d. Fat is dissolved
Q. The presence of ozone in the stratosphere is responsible for –
a. increasing the average global temperature in recent years
b. higher rate of photosynthesis
c. checking the penetration of ultra-violet rays to the earth
d. supplying oxygen for people travelling in jets
Q. The advantage of detergents over soaps is –
a. Detergents are soluble in water
b. Detergents could not give much lather
c. Detergents give lather even with hard water
d. Soaps give lather with only soft water
Q. Cement is usually a mixture of –
a. Calcium silicate and calcium alurninate
b. Calcium silicate and calcium ferrate
c. Calcium aluminate and calcium ferrate
d. Lime stone and silicon dioxide
Q. What is the objective of the 'Kyoto Protocol'?
a. To abolish child labour
b. To eliminate nuclear weapons
c. To increase ground water levels
d. To reduce greenhouse gases
Q. The lustre of the metals is because of –
a. high density, due to closed packing of atoms
b. high polish
c. reflection of light due to the presence of free electrons
d. absorption of light due to the presence of cavities
Q. Cloud is a colloidal dispersion of –
a. Air in a dispersion medium of water
b. Fog in a dispersion medium of water
c. Mist in a dispersion medium of air
d. Water drops in a dispersion medium of air
Q. Conduction band electrons have more mobility than holes because they –
a. are lighter
b. experience collision less frequently
c. have negative charge
d. need less energy to move them
Q. Carbon dioxide is called a greenhouse gas because -
a. its concentration remains always higher than other gases
b. it is used in photosynthesis
c. it absorbs infrared radiation
d. it emits visible radiation
Q. Sullage water is –
a. waste water released from kitchen
b. waste water released from toilets
c. waste water released from factories
d. waste water released from hospitals
Q. A solution is -
a. a homogeneous mixture of two or more substances
b. a solid dissolved in a liquid
c. a solid dissolved i water
d. a mixture of two liquids
Q. Choose the incorrect statement pertaining to organic compounds -
a. They have low melting and boiling points
b. They do not dissolve in water
c. They are not easily combustible
d. They contain mainly carbon and hydrogen
Q. Which of the process is known as nitrification?
a. Reaction of Nitrogen Monoxide with oxygen to form nitric acid
b. Reaction of nitrogen dioxide with water to form nitric acid
c. Conversion of ammonia to nitrites
d. Conversion of nitrite to nitric oxide