Which one of the following is 'd-block element?

• Gd

• Hs

• Es

• Cs

If the ${\mathrm{E}}_{\mathrm{cell}}^{°}$ for a given reaction has a negative value then which of the following gives the correct relationships for the values of $∆$G° and K_eq?

• $∆\mathrm{G}°$ < 0; K_eq > 1

• $∆\mathrm{G}°$ <0; K_eq < 1

• $∆\mathrm{G}°$ > 0; K_eq < 1

• $∆\mathrm{G}°$ > 0; K_eq > 1

Which of the following is an example for heterogeneous catalysis reaction?

• 2SO₂(g) + O₂ $\stackrel{\mathrm{NO}\left(\mathrm{g}\right)}{\to }$ 2SO₃(g)

• Hydrolysis of aqueous sucrose solution in the presence of a aqueous mineral acid

• 2H₂O₂ (l) $\stackrel{\mathrm{Pt}\left(\mathrm{s}\right)}{\to }$ 2H₂O₂(l) + O₂(g)

• Hydrolysis of liquid in the presence of aqueous mineral acid

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of

• acyl chloride > acid anhydride > ester > amide

• ester > acyl chloride > amide > acid anhydride

• acid anhydride > amide > ester > acyl chloride

• acyl chloride> ester> acid anhydride > amide

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

• Zn-Hg with HCl

• LiAlH₄

• H₂ and Pt as catalyst

• Glycol with KOH

36.

Which one of the following is employed as antihistamine?

• Diphenyl hydramine

• Norethindrone

• Omeprazole

• Chloramphenicol

In DNA, the complimentary bases are

• adenine and thymine; guanine and cy1osine

• adenine and thymine; guanine and uracil

• adenine and guanine, thymine and cytosine

• uracil and adenine; cytosine and guanine

Which of the following is not a resonating form of benzaldehyde?

Which one of the following does not undergo iodoform reaction?

• Secondary butyl alcohol

• Iso-propyl alcohol

• Diethyl ketone

• Ethyl alcohol

Which of the following compounds gives carbylamine test?

• N-methyl-o-methyl aniline

• N, N-dimethyl aniline

• 2, 4-diethyl aniline

• p-methyl-N-methyl benzylamine