Which of the reagents shown below would accomplish the following transformations?

      A                                     B
(a) H3O⁺                   BH₃ - THF; H₂O₂/NaOH
(b) NaOH                   BH₃ - THF; H₂O₂/NaOH
(c) HBr in ether          Hg(OAc)₂/H₂O; NaBH₄
(d) NaNH₂                  Hg(OAc)₂/H₂O; NaBH₄

, the missing reagent is:-

(1) CF₃CO₃H

(2) H₂SO₄ 

(3) LAH

(4) NaBH₄

Compound  and $\underset{\left(\mathrm{Q}\right)}{{\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{O}-{\mathrm{CH}}_2-{\mathrm{CH}}_3}$ can be differentiated by

(1) H₃O^⊕, Na

(2) H₃O^⊕, Tollens' test

(3) H₃O^⊕, Fehling test

(4) All of these

can be differentiated by:

1. Hinsberg test                 

2. Iso-cyanide test

3. NaNO₂, HCl, then β-Naphthol     

4. NaOH

(p-ethyl phenol) (p-methyl anisole) (p-ethyl benzyl alcohol)

Above compounds can be differentiated by using the reagent:-

(a) NaOH, Tollen's reagent, FeCl3

(b) CrO3, Tollen's reagent, FeCl3,

(c) Tollen's reagent, CrO3, FeCl3

(d) Na, Tollen's reagent, FeCl3

Give test to differentiate (Bromobenzene) Ph-Br and benzyl bromide (PhCH₂Br).
(1) (i) aq. KOH (ii) Na

(2) AgNO₃

(3) KMnO₄

(4) All these

Give test to differentiate 1,1-dichloroethane and 1, 2-dichloroethane:
1. 2,4-DNP then aq. KOH

2. aq. KOH then 2, 4-DNP

3. NaHSO₃

4. Lucas reagent

$\mathrm{In} \mathrm{the} \mathrm{dehydration} \mathrm{reaction},$
${\mathrm{CH}}_3{\mathrm{CONH}}_2\stackrel{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }{\mathrm{CH}}_3\mathrm{C}\equiv \mathrm{N},$
$\mathrm{the} \mathrm{hybridization} \mathrm{state} \mathrm{of} \mathrm{carbon} \mathrm{changes} \mathrm{from}:$

(1) sp³ to sp²

(2) sp to sp

(3) sp² to sp

(4) sp to sp³

The reagent used in dehydrohalogenation process is:

(1) alcoholic KOH

(2) NaNH₂

(3) C₂H₅ONa

(4) all of these

The reaction, ${\mathrm{CH}}_2=\mathrm{CHCHO}\stackrel{\mathrm{HX}}{\to }\mathrm{gives}:$

(1) CH₃CHXCHO

(2) CH₂XCHCHO

(3) CH₂=CHCHX₂

(4) none of these