911. In silvery paints, the main constituent present is?
(A) Silver Powder
(B) Lead Powder
C. Aluminium Powder
(D) White Lead
912. Tetraethyl lead (TEL) is?
(A) An Antioxidant
(B) A catalyst in burning fossil fuel
(C) A reductant
D. An antiknock compound
913. Acetone reacts with HCN to form a cyanohydrin. It is an example of________________?
C. Nucleophilic addition
(A. Electronphilic addition)
(B. Electrophilic substitution)
(D. Nucleophilic substitution)
914. Which of the following reactions may be associated with aldehydes and ketones ?
D. All of the above
(A. Nucleophile addition)
(B. Polymerization)
(C. Oxidation)
915. Which of the following reagents will react with both aldehydes and ketones ?
(A. Grignard reagent)
(B. Tollens reagent)
C. Fehlings reagent
(D. Benedicts reagent)
916. Which of the following do not give aldol condensation reactions ?
(A. Formaldehyde)
(B. Acetaldehyde)
(C. Diemthyl ketone)
(D. Propionaldehyde)
917. Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
(A. Formamint)
(B. Lactomint)
(C. Aldomint)
D. Formalactose
918. Formula of haloform is_________________?
(A. HCOX)
(B. CX4)
C. CHX3
(D. CH3X)
919. Formalin consists of a mixture of formaldehyde methyl alcohol and water. The percentage of water in it is________________?
(A. 60%)
(B. 50%)
(C. 52%)
D. 8%
920. On heating aldehydes with Fehlings solution, we get a precipitate whose colour is_________________?
(A. Pink)
(B. Black)
(C. Yellow)
D. Brick red
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