Entry Test MCQ :: Aldehydes and Ketones

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21.

Which of the following will not give addition reaction with NaHSO3

A.	HCHO	B.	CH3CHO
C.	CH3-CH2-CHO	D.	None of the above

22.

On heating aldehydes with Fehlings solution we get a precipitate whose colour is

A.	pink	B.	black
C.	yellow	D.	brick red

23.

Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide?

A.	carbonic acid	B.	ethanol
C.	acetic acid	D.	methanoic acid

24.

Aldehyde and ketone have same general formula for homologous series

A.	CnH2nO2n	B.	CnH2n
C.	CnH2nO	D.	CnH2nOn+1

25.

Oxidation of primary alcohol gives

A.	ketone	B.	Aldehyde
C.	Alkene then - COOH	D.	Ester

26.

Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _____ as promoter

A.	PdCl2	B.	Cu2Cl2
C.	CuCl2	D.	PbCl2

27.

Ncleophilic addition reactions are catalysed

A.	Acid	B.	Base
C.	Both a and b	D.	None

28.

Acetaldehyele cyanohydrin on acid hydrolysis yields

A.	Tartaric acid	B.	Propanoic acid
C.	Lactic acid	D.	Valeric acid

29.

Acetal on acid hydrolysis generates

A.	Alcohol	B.	Ketone
C.	Both a & b	D.	None of the above

30.

Which one exhibits aldol condensation

A.	HCHO	B.	C6H5CHO
C.	Cl3CCHO	D.	CH3COCH3