21.

Which of the following effects of NO₂ group operates on -NH₂ group in this molecule?

• a) Only +M effect

• Only -M effect

• Both -I and -M effect

• Only -I effect

What is the product in the following reaction?

• Benzoquionone

• Cyclohexane-1-one

• Benzoic sulphate

• Benzoric acid

Which one of the following has the highest nucleophilicity?

• OH^-

• CH${}_3^{-}$

• NH${}_2^{-}$

• F^-

Which of the following compounds will exhibit geometrical isomerism?

• 3-phenyl-1-butene

• 2-phenyl-1-butene

• 1, 1-diphenyl-1-proene

• 1-phenyl-2-butane

Which of the following compounds is insoluble even in hot concentrated H₂SO₄?

• Benzene

• Hexane

• Aniline

• Ethylene

Which of the following is a meso-compoud?

• cis-1, 3-dimethylcyclohexane

• trans-1, 3-dimethylcyclohexane

• cis-1, 4-dimehylcyclohexane

• trans-1, 4-dimethylcyclohexane

Which alkaline earth metal compound is volatile?

• Mg₃N₂

• Ca₃N₂

• Be₃N₂

• None of the equation

Inorganic graphite is

• B₂H₆

• BN

• BF₃

• B₂N₃H₆

Increasing order of acidic strength of given compounds is

• (ii) < (i) < (iv) < (iii)

• (i) < (iii) < (iv) < (ii)

• (i) < (iii) < (ii) < (iv)

• (iii) < (i) < (iv) < (ii)

Provide an acceptable name for the alkene shown below:

• 5-ethyl-6-methyl-propyl decane

• 2-ethyl-6-methyl-2-propyldecane

• 2-ethyl-6-methyl-5-propyldecane

• 6-ethyl-2-methyl-5-propyldecane