41.

Which pair of the following carbonyl compounds can be diifferentiated by I₂/NaOH?

• C₆H₅-CHO and C₆H₅-CO-CH₂-CH₃

• C₆H₅-CO-CH₃ and CH₃-CH₂-CO-CH₃

• CH₃-CH₂-CO-CH₂-CH₃ and C₆H₅COCH₂CH₃

• C₆H₅-CO-CH(CH₃)-CH₃ and C₆H₅-CO-CH₃

In the reaction sequence,

CH₃CN $\underset{{\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{{\mathrm{CH}}_3\mathrm{MgBr}}{\to }}\left[\mathrm{A}\right] \stackrel{\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to } \left[\mathrm{B}\right]$. The products [A] and [B] are

•  

• (CH₃)₃COH, (CH₃)₂C=CH₂

• (CH₃)₂CHOH, CH₃CH=CH₂

• CH₃COCH₃, CH₃CH=CH₂

In the carbylamine reaction, R-X is converted to R-Y via the intermediate Z. R-X, R-Y and Z, respectively, are

• RNH₂, RNC, Carbene

• RNH₂, RNC, nitrene

• RNC, RNH₂, carbene

• ROH, RNC, nitrene

Which of the following is not a biopolyme?

• Polysaccharide

• Protein

• Lipid

• Nucleic acid

Which of the following contains thymine?

• m-RNA

• r-RNA

• t-RNA

• None of the above

Which of the following statements is true?

• Denaturation of protein changes the primary structure of protein

• All proteins act as biocatalyst

• C-terminal amino acid in proteins is determined by Edman degradation

• The pleated sheet structure of proteins was determined by Pauling

Which one of the following is the strongest base ?

• 2,4,6-trinitroaniline

• 2,4,6-trinitro-N,N-dimethyl aniline

• N, N-dimethyl aniline

• Anline

The given reaction is called as

• Schmidt rearrangement

• Curtius rearrangement

• Hofmann rearrangement

• Lossen rearrangement

The functional groups present in aspirin are

• OH, NHCOCH₃

• OC₂H₅, COOH

• COOH, OCOCH₃

• H, OCOCH₃

The boiling points of three isomeric pentanes 1, 2 and 3 are

(1) 9.5°C
(2) 28°C
(3) 36°C
1, 2 and 3 are respectively

• n-pentane, iso-pentane, neo-pentane

• iso-pentane, neo-pentane, n-pentane

• n-pentane, neo-pentane, iso-pentane

• neo-pentane, iso-pentane, n-pentane