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Chemistry 1488 MCQs [All-Courses]

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oost your exam preparation with our Chemistry MCQs designed for PPSC, FPSC, NTS, OTS, PTS, AJKPSC, BPSC, KPPSC, PMS, CSS, and all competitive exams.
Our content covers Basic Chemistry, Atomic Structure, Periodic Table, Chemical Reactions, Acids & Bases, Organic Chemistry, and everyday chemical concepts.

All Topics  1488

Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
A methanol
B methanol
C carbonic acid
D methane
Correct Answer: methanol
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
A alkyl groups are electron donating
B steric hindrance
C Both A and B
D none
Correct Answer: Both A and B
Which one of the following alcohol has greater boiling point___________________?
A ethanol
B ethylene glaycol
C glycerol
D methanol
Correct Answer: glycerol
Cannizzaros reaction is not given by__________________?
A formaldehyde
B acetaldehyde
C benzaldehyde
D trimethyl acetaldehyde
Correct Answer: acetaldehyde
Ethanol and methanol can be distinguished by a__________________?
A Iodoform test
B Lucas test
C Benedicts test
D Tollens test
Correct Answer: Iodoform test
Which of the following compounds will react with Tollens reagent ?
A CH3-CHO
B CH3-CH-CH3
C CH3-COOH
D CH3-CO-CH2-CH3
Correct Answer: CH3-CHO
The hydrogenation of phenol in the presence of Ni and heat gives_________________?
A cyclohexane
B n – hexane
C 1 – hexanol
D cyclohexanol
Correct Answer: cyclohexanol
Which of the following substances does not give iodoform test ?
A acetaldehyde
B ethyl alcohol
C methyl alcohol
D acetone
Correct Answer: ethyl alcohol
Phenol was isolated by Runge from________________?
A vegetable oil
B coaltar
C wood
D none of these
Correct Answer: coaltar
Which of the following reaction is not shown by ketones ?
A reaction with HCN
B reaction with NaHSO3
C reaction with 2 4 dinitrophenyl hydrazine
D reaction with Fehling solution
Correct Answer: reaction with Fehling solution
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