ENTRANCE TEST – 2010 | Multiple Questions and Answers

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ENTRANCE TEST – 2010 Multiple Questions and Answers.

21.	The introduction of NO2 group in benzene ring is called ‘Nitration’. The nitration of benzene takes place when it is heated with a 1:1 mixture of _________ at 50 oC-55 oC.

	A.	Conc. HNO3 and conc. HCl
	B.	Conc. HNO3 and conc. Acetic acid
	C.	Conc. HNO3 and H3PO4
	D.	Conc. HNO3 and conc. H2SO4

22.	During SN2 reactions, configuration of the alkyl halide molecule:

	A.	Gets inverted
	B.	Remains same
	C.	Depends upon the carbon atom
	D.	Depends upon the electronegativity of halide

23.	Grignard reagents are prepared by the reaction of magnesium metal with alkyl halides in the presence of

	A.	Dry Ether
	B.	Sodium Lead Alloy
	C.	Alcohol
	D.	Water

24.	Methanol is prepared from carbon monoxide and hydrogen. The catalyst used for this reaction is

	A.	ZnO + CoO2
	B.	ZnO + CuO
	C.	ZnO + Ag2O
	D.	Cr2O3 + ZnO

25.	Dissociation constant of phenol is

	A.	1.2 x 10-10
	B.	1.2 x 1010
	C.	1.3 x 1010
	D.	1.3 x 10-10

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