Chemistry GK Practice Question and Answer
8 Q: Which of the following will be a negative ion?
632 0650ab26a63078e50a28c8adb
650ab26a63078e50a28c8adb- 1If it has more electrons than protonsfalse
- 2If it has more electrons than neutronstrue
- 3If it has more protons than electronsfalse
- 4If it has more protons than neutronsfalse
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Answer : 2. "If it has more electrons than neutrons"
Explanation :
If an atom has more electrons than protons, it is a negative ion or anion. If it has more protons than electrons, it is a positive ion.
Q: Which metal reacts with water?
594 061275b3bb05363065a00517c
61275b3bb05363065a00517c- 1goldfalse
- 2Potassiumtrue
- 3Silverfalse
- 4Leadfalse
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Answer : 2. "Potassium"
Q: What is the percentage of carbon in steel?
590 0612759cdb05363065a00450e
612759cdb05363065a00450e- 13 %false
- 24 %false
- 32 %true
- 45 %false
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Answer : 3. "2 %"
Q: Which of the given metals cannot be extracted using smelting?
578 062f10b533342ab11842d1eb2
62f10b533342ab11842d1eb2- 1Fefalse
- 2Altrue
- 3Znfalse
- 4Pbfalse
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Answer : 2. "Al "
Q: Which of the following elements is NOT a component of baking soda?
574 164bfc857a2d4dcaf044da339
64bfc857a2d4dcaf044da339- 1Hydrogenfalse
- 2Calciumfalse
- 3Sodiumfalse
- 4Oxygentrue
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Answer : 4. "Oxygen"
Explanation :
1. Which of the following calcium elements is not a component of baking soda?
2. The chemical formula of baking soda is NaHCO3, which is composed of four elements sodium, hydrogen, carbon and oxygen.
3. Baking soda is an alkaline substance used as a leavening agent in baking.
Q: Starch in potatoes reacts with _____, turning to a blue colour.
565 16439228372ca731a99323e96
6439228372ca731a99323e96- 1fluorinefalse
- 2Brominefalse
- 3Iodinetrue
- 4Chlorinefalse
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Answer : 3. "Iodine "
Q: Which of these non-metals is shiny?
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61275ab6dbe92e068b91060b- 1Carbonfalse
- 2Iodinefalse
- 3Sulfurfalse
- 4Brominetrue
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Answer : 4. "Bromine"
Q: Which law was studied in the year 1787, in which it was said that the volume of a gas increases with its absolute temperature and if its absolute temperature decreases, then its volume will decrease?
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64b5204188d5e4f52dd2277b- 1Boyle’s lawfalse
- 2Dalton’s lawfalse
- 3Avogadro’s lawfalse
- 4Charles's lawtrue
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Answer : 4. "Charles's law"
Explanation :
1. Charles's law (also known as volume law) is an experimental gas law.
2. The volume of a gas increases with its absolute temperature and as its absolute temperature decreases its volume also decreases.
3. Charles's law was studied in the year 1787.