Chemistry General Knowledge Questions Practice Question and Answer
8 Q: Which among the following noble gas has highest molar mass?
3082 05f083354429a37679ec22f49
5f083354429a37679ec22f49- 1Krfalse
- 2nefalse
- 3Arfalse
- 4Xetrue
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Answer : 4. "Xe"
Q: What happens in most toothpastes to prevent tooth decay?
680 05fe9a2ea04717d1a56bf8d1f
5fe9a2ea04717d1a56bf8d1f- 1Bromidefalse
- 2Fluoridetrue
- 3Iodidefalse
- 4Chloridefalse
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Answer : 2. "Fluoride"
Q: What is the systematic name of PbO? 1345 05b5cc5ffe4d2b4197774b412
5b5cc5ffe4d2b4197774b412- 1Plumbic oxidefalse
- 2Lead oxidefalse
- 3Lead(II) oxidetrue
- 4All of the abovefalse
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Answer : 3. "Lead(II) oxide"
Explanation :
Answer: C) Lead(II) oxide Explanation: The systematic name for a chemical is the unique name given to it by the International Union of Pure Applied Chemistry (IUPAC). The IUPAC name can differ from a chemical compound's general name. PbO is an ionic compound since it consists of a Lead as metal and Oxygen as nonmetal. The systematic name for PbO is Lead (II) oxide. Here we need to put the (II) since lead has more than one combining capacity.
Q: Which gas is mostly present in Venus atmosphere?
1299 05ed600125ccf7008ed8ceeb9
5ed600125ccf7008ed8ceeb9- 1Hydrogenfalse
- 2Carbon Dioxidetrue
- 3Heliumfalse
- 4Nitrogenfalse
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Answer : 2. "Carbon Dioxide"
Q: How many categories of elements are divided on the basis of properties?
1048 05eeadf0fad25df5a63247e87
5eeadf0fad25df5a63247e87- 14false
- 26false
- 33true
- 42false
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Answer : 3. "3"
Q: In atom, neutron was discovered by –
871 05f0ed5dfdcdb5f61f5c4c220
5f0ed5dfdcdb5f61f5c4c220- 1Rutherfordfalse
- 2Newtonfalse
- 3J.J . Thomsonfalse
- 4Chadwicktrue
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Answer : 4. "Chadwick "
Q: Which of the following is purified by Elevation method-
889 05f72f3dea921aa16e68288a7
5f72f3dea921aa16e68288a7- 1Naphthalenetrue
- 2Etherfalse
- 3Benzoic acidfalse
- 4None of thesefalse
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Answer : 1. "Naphthalene"
Q: The catalyst is a substance through which the rates of chemical reactions ________.
780 06082b13391a9f43a97b71fca
6082b13391a9f43a97b71fca- 1Decreasesfalse
- 2Changesfalse
- 3Increasestrue
- 4None of thesefalse
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