Chemistry Practice Question and Answer
8 Q: How are 'anions' formed?
1547 0609e4c75e941dd6183d99e45
609e4c75e941dd6183d99e45- 1Addition of electrontrue
- 2Removal of electronfalse
- 3Addition of protonfalse
- 4Removal of protonfalse
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Answer : 1. "Addition of electron "
Q: Substances that have a sour taste and which makes a solution of blue litmus red are called?
1546 05f697b91397b1a52908c03b2
5f697b91397b1a52908c03b2- 1acidtrue
- 2saltsfalse
- 3consumedfalse
- 4Basefalse
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Answer : 1. "acid"
Q: What type of chemical reaction is combustion of natural gas?
1544 05f6979af558d255013b234b3
5f6979af558d255013b234b3- 1combination reactionfalse
- 2decomposition reactionfalse
- 3exothermic reactiontrue
- 4dissolution reactionfalse
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Answer : 3. "exothermic reaction"
Q: Identify a class of compounds that has a functional group –OH.
1543 064b51d2e568e7ff594b01e05
64b51d2e568e7ff594b01e05- 1Alcoholtrue
- 2Ethanefalse
- 3Ketonefalse
- 4Aldehydefalse
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Answer : 1. "Alcohol"
Explanation :
1. That class of compounds, which contain a functional group –OH, is called alcohol.
2. Alcohols contain a hydrogen atom and a hydroxyl group (-OH) along with a carbon atom.
3. The hydroxyl group is a polar group, which makes the alcohol soluble in water.
Q: Sodium chloride and water are formed by the reaction of sodium hydroxide and hydrochloric acid. What is this reaction?
1532 05f698f9a558d255013b2b659
5f698f9a558d255013b2b659- 1neutralizationtrue
- 2Disintegrationfalse
- 3combinationfalse
- 4precipitationfalse
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Answer : 1. "neutralization"
Q: Which compound is formed when copper is burnt in air?
1530 0612764bd93f02206607eefa2
612764bd93f02206607eefa2- 1copper hydroxidefalse
- 2copper hydridefalse
- 3Copper Oxidetrue
- 4nothingfalse
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Answer : 3. "Copper Oxide"
Q: In which process is a protective zinc coating applied on iron to prevent it from rusting?
1521 060927508cc29175f0f879192
60927508cc29175f0f879192- 1Galvanisationtrue
- 2Annealingfalse
- 3Smeltingfalse
- 4Weldingfalse
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Answer : 1. "Galvanisation"
Q: Water in case of HCl acts as a/an ___________, in case of ammonia acts as a/an ________
1520 063c7c8d3be373f6c9546a490
63c7c8d3be373f6c9546a490- 1Base, basefalse
- 2Base, acidtrue
- 3Acid, basefalse
- 4Acid, acidfalse
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