Arrange their stabilities of given gem-diols in decreasing order.

(a) I > II > III

(b) III > II > I

(c) I > III > II

(d) III > I > II 

What is the product obtained by heating the following allylic ether of phenol?

An acid among the following acids raises the acidity of phenol is:

1. Dil. H₂SO₄       

2. Dil. HCl           

3. Conc. H₂SO₄           

4. Conc. CH₃COOH

; Compounds (X) and (Y) can be differentiated by:
(1) ${\mathrm{H}}_3{\mathrm{O}}^{\oplus }$, NaOI

(2) ${\mathrm{H}}_3{\mathrm{O}}^{\oplus }$, then Fehling test

(3) ${\mathrm{H}}_3{\mathrm{O}}^{\oplus }$, then Na

(4) Both (b) and (c)

Test to differentiate between (CH₃OH) and (Ph-OH) is/are:

1. Litmus test

2. FeCl₃

3. Br₂/H₂O

4. All of these

In the reaction  + CH₃OH $\stackrel{{\mathrm{CH}}_3\mathrm{ONa}}{\to }$Product.

The product is:

(1) 

(2) 

(3) 

(4) 

Methanol and ethanol can be distinguished by the following:

1. By reaction with metallic sodium.

2. By reaction with caustic soda.

3. By heating with iodine and washing soda.

4. By heating with zinc and inorganic mineral acid.

An ester cannot be prepared by -

1. RCOOH + R'OH + OH^-

2. RCOCl+R'OH +Pyridine

3. RCOOH+ R’OH +H⁺

4. (RCO)₂O + R'OH + Pyridine

Methylated spirit is:

1. methanol containing some pyridine

2. ethanol containing some methanol

3. pure methanol

4.  95% methanol