The boiling point of carboxylic acids are relatively high due to?

D. Intermolecular hydrogen bonding

A. Splitting heavy nucleus into smaller nuclei

B. Combining light nuclei to form a heavier nucleus

C. Spontaneous emission of alpha particles from a nucleus

Everyday Science · Atoms, Elements & Compounds · page 34 of 41

Chemistry (General Concepts) MCQs with Answers

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Chemistry (General Concepts) MCQs (331–340)

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331.
IUPAC name of the compound C₂H₅CH=C(C₂H₇)C₂H₅ is _?
Correct Answer: A. 4-ethylhept-3-ene
One-liner
The IUPAC name of C₂H₅CH=C(C₂H₇)C₂H₅ is 4-ethylhept-3-ene.
332.
If a radioactive substance reduces to 1/16th of its original mass in 40 days, what is its half-life?
Correct Answer: C. 10 days
One-liner
The half-life of the radioactive substance is 10 days because 1/16th remaining means 4 half-lives have passed in 40 days.
333.
The boiling point of carboxylic acids are relatively high due to?
Correct Answer: D. Intermolecular hydrogen bonding
One-liner
The boiling point of carboxylic acids is relatively high due to intermolecular hydrogen bonding.
334.
Hydrogen bond does NOT exist in _?
Correct Answer: C. HCl
One-liner
Hydrogen bonding does NOT exist in HCl because chlorine is not sufficiently electronegative and its lone pairs are too diffuse to form effective hydrogen bonds.
335.
Nuclear fission is?
Correct Answer: A. Splitting heavy nucleus into smaller nuclei
One-liner
Nuclear fission is the process of splitting a heavy nucleus into smaller nuclei, releasing a large amount of energy.
336.
The electrophile in aromatic sulphonation is
Correct Answer: D. SO3
One-liner
The electrophile in aromatic sulphonation is SO3 (sulphur trioxide).
337.
All of the following are liquid crystals except?
Correct Answer: B. Soap solution
One-liner
Soap solution is not a liquid crystal; it is a colloidal solution (micellar system), whereas the others are true liquid crystalline substances.
338.
Which of the following alkyl halides may undergo SN² reaction except?
Correct Answer: C. Tertiary
One-liner
Tertiary alkyl halides do not readily undergo SN² reactions due to steric hindrance around the carbon atom.
339.
Which is the most stable hydrocarbon?
Correct Answer: C. trans-2-butene
One-liner
The most stable hydrocarbon among alkenes is trans-2-butene due to its symmetrical structure and minimal steric hindrance.
340.
The pKb of n-propyl amine is
Correct Answer: A. 3.32
One-liner
The pKb of n-propyl amine is 3.32.

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Chemistry (General Concepts) MCQs with Answers

Chemistry (General Concepts) MCQs (331–340)

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