Chemistry Practice Question and Answer
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Q: Which of the given metals cannot be extracted using smelting?
858 062f10b533342ab11842d1eb2
62f10b533342ab11842d1eb2- 1Fefalse
- 2Altrue
- 3Znfalse
- 4Pbfalse
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Answer : 2. "Al "
Q: __________________ is a drug or substance that makes you feel relaxed and makes your body work and react more slowly.
852 062e7ec656f92bf0da7c49f2d
62e7ec656f92bf0da7c49f2d- 1Antidotefalse
- 2Analgesicfalse
- 3Antihistaminefalse
- 4Depressanttrue
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Answer : 4. "Depressant"
Q: Starch in potatoes reacts with _____, turning to a blue colour.
844 16439228372ca731a99323e96
6439228372ca731a99323e96- 1fluorinefalse
- 2Brominefalse
- 3Iodinetrue
- 4Chlorinefalse
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Answer : 3. "Iodine "
Q: In which of the following classifications are the elements arranged in the order of their increasing atomic number?
837 060827cb45027727e2faa5d77
60827cb45027727e2faa5d77- 1The Modern Periodic Tabletrue
- 2Mendeleev's Periodic Table/false
- 3Newland's Law of Octavesfalse
- 4Dobereiner's Triadsfalse
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Answer : 1. "The Modern Periodic Table "
Q: The brand name Teflon represents which polymer?
828 06389c0e39ebad6607b7f646d
6389c0e39ebad6607b7f646d- 1Polystyrenefalse
- 2Polypropylenefalse
- 3Polytetrafluoroethylenetrue
- 4Polyethylene terephthalatefalse
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Answer : 3. "Polytetrafluoroethylene"
Q: Which of the following is a Lewis base?
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63c7b9de8731ac33279af243- 1Ammoniatrue
- 2Magnesium chloridefalse
- 3Aluminum chloridefalse
- 4Sodium ionfalse
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Answer : 1. "Ammonia"
Q: The common name of dichlorodifluoromethane is _____.
795 062cd637951fe3472d6b30512
62cd637951fe3472d6b30512- 1gypsumfalse
- 2boraxfalse
- 3galenafalse
- 4Freontrue
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Answer : 4. "Freon"
Q: Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens?
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63c8f9528731ac33279f0648- 1To increase the concentration of NO3- ionsfalse
- 2To increase the solubility product of AgClfalse
- 3It increases the precipitation of AgClfalse
- 4For the decomposition of Na2S AND NaCN formedtrue
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Answer : 4. "For the decomposition of Na2S AND NaCN formed"
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