When glycerol is treated with excess of HI, it produces
2-iodopropane
allyl iodide
propene
glycerol triiodide
Following compounds are given
(i) CH3CH2OH
(ii) CH3COCH3
(iii)
(iv) CH3OH
Which of the above compound(s) on being warmed with iodine solution and NaOH, will give iodoform?
(i), (iii) and (iv)
Only (ii)
(i), (ii) and (iii)
(i) and (ii)
Fructose reduces Tollen's reagent due to
asymmetric carbons
primary alcoholic group
secondary alcoholic group
enolisation of fructose followed by conversion to aldehyde by base
Which of the following is not a fat soluble vitamin?
Vitamin-B complex
Vitamin-D
Vitamin-E
Vitamin-A
Which of the statements about 'Denaturation' given below are correct?
Statements
(i) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(ii) Denaturation leads to the conversion of double strand of DNA into single strand.
(iii) Denaturation affects primary structure which gets destroyed.
(ii) and (iii)
(i) and (iii)
(i) and (ii)
(i), (ii) and (iii)
The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds
III > II > I
II > I > III
I > III > II
I > II > III
Match the compounds given in List I with List II and select the suitable option using the codes given below.
List I | List II | ||
A. | Benzaldehyde | 1. | Phenolphthalein |
B. | Phthalic anhydride | 2. | Benzoin condensation |
C. | Phenyl benzoate | 3. | Oil of wintergreen |
D. | Methyl salicylate | 4. | Fries rearrangement |
A B C D
4 1 3 2
A B C D
4 2 3 1
A B C D
2 3 4 1
A B C D
2 1 4 3
D.
A B C D
2 1 4 3
(a) Benzoin condensation when an ethanolic solution of benzaldehyde is heated with strong alkali like KCN or NaCN, we get benzoin.
(b)Formation of phenolphthalein: When phenol is treated with phthalic anhydride in the presence of conc. H2SO4 it gives phenolphthalein, an indicator.
(c) Fries rearrangement: Phenyl benzoate when heated with anhydrous AlCl3 in the presence of inert solvent gives ortho-and para-hydroxybenzophenone. In this rearrangement, there is a benzoyl group migration from the phenolic oxygen to an ortho-and para-position.
(d) Methylsalicylate
(A chief constituent of oil of wintergreen)