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Chemistry MCQs Quizzes & Practice Tests with Answer Key
Q.1: Which sequence of steps is correct for the manufacture of cement ?
- crushing heating mixing grinding
- crushing mixing heating grinding and mixing
- crushing grinding mixing heating
- mixing heating grinding crushing
C
Q.2: The composition of mixture of clay and lime stone in the raw for cement material is ———?
- 75% lime stone and 25% clay
- 25% lime stone and 75% clay
- 15% lime stone and 55% clay
- 55% lime stone and 15% clay
A
Q.3: The important function of burning zone in the rotary kilm is ———?
- to dry the moisture of slurry
- to decompose lime stone to unslaked lime
- combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
- to reduce the impurities
C
Q.4: Major cause of SO2 on global scale is———?
- volcanoes
- electric sparks
- combustion
- All Of Above
A
Q.5: The yellow colour in photochemical smog is due to presence of———?
- dinitrogen oxide
- nitrogen dioxide
- chlorine gas
- chlorine dioxide
B
Q.6: Which of the following is not primary pollutant———?
- SO3
- CO
- NO
- H2SO4
D
Q.7: Which of the following gases is the main cause of acid rain ?
- CO
- NO2
- both a And b
- none of the above
B
Q.8: Which of the following factors help to measure quallity of water ?
- DO
- BOD
- COD
- all of the above
D
Q.9: A single chlorine free radical can destroy how many ozone molecules ?
- 10
- 100
- 10000
- 100000
D
Q.10: Chlorination of water may be harmful if the water contains———?
- Ammonia
- Dissolved oxygen
- Carbon dixide
- All Of Above
A