Everyday Science MCQs

5120 MCQs  (Page 274 of 512)

Attempt Everyday Science MCQs Quiz
Which electronic configuration corresponds to an element of group IIIA ?
A. 1s2 2s2 2p3
B. 1s2 2s2 2p6 3s2 3p1
C. 1s2 2s2 2p4
D. 1s2 2s2 2p6 3s2 3p6 4s2 3d1
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Benzene is heated in air with V2O5 at 450°C it undergoes________________?
A. Substitution reaction
B. Addition reaction
C. Elimination reaction
D. Oxidation reaction
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The preparation of benzene from acetylene can also be said as_________________?
A. Oxidation
B. Polymerization
C. Dehydration
D. Condensation
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Ozonolysis of benzene produces___________________?
A. Glycol
B. Glyoxal
C. Vicinal diol
D. Both b & c
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Boron is non-netal whereas A1 is metal. It is due to_______________________?
A. Small size
B. High nuclear charge
C. Both a and b
D. No authorized justification yet
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By which method the molecular mass of benzene was determined as 78.108 ?
A. Specific gravity method
B. Vapour density method
C. X-ray diffraction method
D. Distillation methos
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Chlorination of toluene in the presence of sublight produces_________________?
A. Benzyl chloride
B. O – chlorotoluene
C. P – chlorotoluene
D. Benzoic acid
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Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?
A. Acetylene
B. N-hexane
C. Benzene sulphonic acid
D. Sodium benzoate
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Which is fused cyclic aromatic compound _____________________?
A. Diphenyl amine
B. Diphenyl methane
C. Naphthalene
D. Biphenyl
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Acetophenone is a_____________________?
A. Ether
B. Ketone
C. Aldehyde
D. Ester
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Word of the Day
25 Jul
January
a preference or special liking for something; a bias in favour of something.
2021:00:00

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