Which of the following are known as mercaptans?

1. Thio-alcohols                         

2. Thio-ethers

3. Thio-aldehydes                     

4. Thio-acids

Picric acid and benzoic acid can be distinguished by:

1. Aqueous NaHCO₃                   

2. Aqueous $\mathrm{NaOH}$

3. Aqueous FeCl₃                       

4.  Aqueous Na₂CO₃  

Ethyl alcohol is also known as:

1. Spirit of wine                         

2. Methyl carbinol

3. Grain alcohol                           

4. All of the above

The value of C–O–C angle in ether molecule is:

1. 180$°$                                     

2. 150$°$ 

3. 90$°$                                       

4. 110$°$

Proof spirit contains about:

1. 48% alcohol by mass

2. 10% alcohol by mass

3. 5% alcohol by mass

4. 90% alcohol by mass

Glycerol on oxidation with dil. HNO₃ gives:

1. Tartronic acid                               

2. Mesoxalic acid

3. Oxalic acid                                   

4. Glyceric acid

Phenol and benzoic acid can be distinguished by:

1. Aqueous NaHCO₃                           

2. Aqueous NaNO₃

3. Aqueous NaOH                               

4. Conc. H₂SO₄

23g of sodium react with CH₃OH to give: 

1. 1 mole of O₂                           2. 1/2 mole of H₂

3. 1 mole of H₂                           4. None of the above

The decreasing order of boiling points of $1°$,$2°$,$3°$ alcohol is:

1. $1°$>$2°$>$3°$                             

2. $3°$>$2°$>$1°$

3. $2°$>$1°$>$3°$                             

4. None of the above

Phenol is less soluble in water. It is due to:

1. Non-polar nature of phenol

2. Acidic nature of -OH group

3. Non-polar hydrocarbon part in it

4. None of the above