Chemistry Practice Question and Answer
8 Q: In 1845, which German chemist published a method for the synthesis of acetic acid, a natural product containing two carbon atoms?
848 0649aa86b1a612ce001f66c19
649aa86b1a612ce001f66c19- 1Friedrich Wohlerfalse
- 2Marcellin Berthelotfalse
- 3Joseph Gay-Lussacfalse
- 4Hermann Kolbetrue
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Answer : 4. "Hermann Kolbe"
Explanation :
1. In 1845, the German chemist who published a method for the synthesis of 'acetic acid', a natural product containing two carbon atoms, was Hermann Kolbe.
2. He created carbon disulfide with chlorine, and the end result was carbon tetrachloride.
Q: Find the compound which undergoes nucleophilic substitution reaction exclusively by an SN1 mechanism
841 063c921a2bdbddb32fda19117
63c921a2bdbddb32fda19117- 1Benzyl chloridetrue
- 2Chlorobenzenefalse
- 3Ethyl chloridefalse
- 4Isopropyl chloridefalse
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Answer : 1. "Benzyl chloride "
Q: Oiled paper is?
840 061ea7f30e3f9cf3e03e0f578
61ea7f30e3f9cf3e03e0f578- 1Translatorfalse
- 2opaquetrue
- 3transparentfalse
- 4none of thesefalse
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Answer : 2. "opaque"
Q: Identify a class of compounds that has a functional group –OH.
834 064b51d2e568e7ff594b01e05
64b51d2e568e7ff594b01e05- 1Alcoholtrue
- 2Ethanefalse
- 3Ketonefalse
- 4Aldehydefalse
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Answer : 1. "Alcohol"
Explanation :
1. That class of compounds, which contain a functional group –OH, is called alcohol.
2. Alcohols contain a hydrogen atom and a hydroxyl group (-OH) along with a carbon atom.
3. The hydroxyl group is a polar group, which makes the alcohol soluble in water.
Q: Which of the following are metals found in free state in the earth's crust?
829 061275de893f02206607eb973
61275de893f02206607eb973- 1Agtrue
- 2Mgfalse
- 3Alfalse
- 4Znfalse
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Answer : 1. "Ag"
Q: The alkaloid naturally found in coffee, cocoa and colanut is
829 06389c40334f83f14727428d0
6389c40334f83f14727428d0- 1Cocainefalse
- 2Morphinefalse
- 3Tanninfalse
- 4Caffeinetrue
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Answer : 4. "Caffeine"
Q: Halogens are belonging to:
825 0608b80848899c91069d282ed
608b80848899c91069d282ed- 1Group17true
- 2Group 8false
- 3Group 18false
- 4Group 7false
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Answer : 1. "Group17 "
Q: During uniform motion of an object along a straight line, its ___________ remains constant with time.
812 0608926140ac1df7d9f80c934
608926140ac1df7d9f80c934- 1accelerationfalse
- 2velocitytrue
- 3forcefalse
- 4decelerationfalse
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