Practice Question and Answer
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Q: Filling helium in balloons is considered more useful than hydrogen, because?
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611b631cccbc2b477b6dc0be- 1it is cheapfalse
- 2less heavyfalse
- 3more flying abilityfalse
- 4it does not form explosive mixture with airtrue
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Answer : 4. "it does not form explosive mixture with air"
Q: Which element forms the maximum number of compounds with hydrogen?
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611b62d6ccbc2b477b6dc099- 1Oxygenfalse
- 2Siliconfalse
- 3Carbontrue
- 4Nitrogenfalse
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Answer : 3. "Carbon"
Q: Which element is found the most in minerals and rocks?
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611b62996d0fd147810fb290- 1Carbontrue
- 2Siliconfalse
- 3Hydrogenfalse
- 4Boronfalse
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Answer : 1. "Carbon"
Q: Polythene is industrially produced by polymerisation of
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611b62596d0fd147810fb227- 1Methanefalse
- 2Acetylenefalse
- 3Ethylenetrue
- 4Styrenefalse
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Answer : 3. "Ethylene"
Q: Vinegar is acidic in nature due to
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611b621114663c47a233f0dd- 1Citric acidfalse
- 2sulfuric acidfalse
- 3hydrochloric acidfalse
- 4acetic acidtrue
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Answer : 4. "acetic acid"
Q: By which process oil is converted into Vegetable Ghee?
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611b61d56d0fd147810fb1f1- 1Hydrogenationtrue
- 2Distillationfalse
- 3Oxidationfalse
- 4Reductionfalse
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Answer : 1. "Hydrogenation"
Q: Which of the following method is adopted to remove salt from sea water?
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611b619adc4e2547a1c919b7- 1sublimationfalse
- 2Evaporationtrue
- 3crystallizationfalse
- 4distillationfalse
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Answer : 2. "Evaporation"
Q: On heating potassium chlorate?
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611b615c14663c47a233f073- 1Nitrogen gas is releasedfalse
- 2Oxygen gas is releasedtrue
- 3Hydrogen gas is releasedfalse
- 4none of thesefalse
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Answer : 2. "Oxygen gas is released"
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