Chemistry Practice Question and Answer
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649a98d3c7d7c7e0672b7673 Answer : 3. "Antagonists"
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Q: A radio-active substance has a half life of six months. Three-fourth of the substance will decay in____.
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5f48d6b3e7f09063e630a3d9- 1Six monthsfalse
- 2Ten monthsfalse
- 3Twelve monthstrue
- 4Twenty four monthsfalse
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Answer : 3. "Twelve months"
Q: What type of chemical reaction is combustion of natural gas?
1411 05f6979af558d255013b234b3
5f6979af558d255013b234b3- 1combination reactionfalse
- 2decomposition reactionfalse
- 3exothermic reactiontrue
- 4dissolution reactionfalse
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Answer : 3. "exothermic reaction"
Q: Which of the following drugs is used to treat indigestion?
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5f697fd0397b1a52908c1074- 1Antacidtrue
- 2Antibioticfalse
- 3Analgesicfalse
- 4Antisepticfalse
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Answer : 1. "Antacid"
Q: What do you call the drugs that bind to the receptor site and inhibit its natural function?
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649a98d3c7d7c7e0672b7673- 1Antidepressantsfalse
- 2Agonistfalse
- 3Antagoniststrue
- 4Depressantsfalse
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Answer : 3. "Antagonists"
Explanation :
1. Name: Antagonist
2. Mechanism of action: By binding to the surface of the receptor, they cause opposition to the natural function.
Q: Chemically " Plaster of Paris " is –
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5ef2f5d481a47f2e7aec098b- 1Calcium oxidefalse
- 2Calcium oxalatefalse
- 3Calcium Sulphatetrue
- 4Calcium Carbonatefalse
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Answer : 3. "Calcium Sulphate "
Q: Water in case of HCl acts as a/an ___________, in case of ammonia acts as a/an ________
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63c7c8d3be373f6c9546a490- 1Base, basefalse
- 2Base, acidtrue
- 3Acid, basefalse
- 4Acid, acidfalse
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Answer : 2. "Base, acid "
Q: Is it an ore of zinc?
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6127594bdbe92e068b90f4f2- 1Zinc Bladetrue
- 2Bauxitefalse
- 3sodium chloridefalse
- 4Sinawarfalse
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Answer : 1. "Zinc Blade"
Q: Which compound is formed when copper is burnt in air?
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612764bd93f02206607eefa2- 1copper hydroxidefalse
- 2copper hydridefalse
- 3Copper Oxidetrue
- 4nothingfalse
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Answer : 3. "Copper Oxide"
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