Chemistry GK Practice Question and Answer
8 Q: Which of the following will be a negative ion?
631 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: What do you call the drugs that bind to the receptor site and inhibit its natural function?
460 0649a98d3c7d7c7e0672b7673
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: Burning of coal is a ______ reaction.
362 06491958013e8bde0322b983e
6491958013e8bde0322b983e- 1displacementfalse
- 2decompositionfalse
- 3combinationtrue
- 4double displacementfalse
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Answer : 3. "combination"
Explanation :
1. The burning of coal is an example of a combination reaction (a combination).
2. When two or more elements combine to form a compound, it is called a combination reaction.
Q: Starch in potatoes reacts with _____, turning to a blue colour.
561 16439228372ca731a99323e96
6439228372ca731a99323e96- 1fluorinefalse
- 2Brominefalse
- 3Iodinetrue
- 4Chlorinefalse
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Answer : 3. "Iodine "
Q: Of the options listed below, the speed of sound is highest in _____ at 25°C.
460 064391e3719f0af16e3835d86
64391e3719f0af16e3835d86- 1Ethanolfalse
- 2Aluminiumtrue
- 3Oxygenfalse
- 4Hydrogenfalse
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Answer : 2. "Aluminium "
Q: Which of the following is known as artificial silk?
453 0642c1b64ed76c064b866560c
642c1b64ed76c064b866560c- 1Acrylicfalse
- 2Nylonfalse
- 3Polyesterfalse
- 4Rayontrue
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Answer : 4. "Rayon"
Q: Which of the following is considered to be the fifth state of matter?
401 064242bd8dcb650c14569c06c
64242bd8dcb650c14569c06c- 1Bose-Einstein condensatetrue
- 2Plasmafalse
- 3Solidfalse
- 4Gasfalse
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Answer : 1. "Bose-Einstein condensate "
Q: Which of the following is a Lewis base?
503 063c7b9de8731ac33279af243
63c7b9de8731ac33279af243- 1Ammoniatrue
- 2Magnesium chloridefalse
- 3Aluminum chloridefalse
- 4Sodium ionfalse
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