Q 1 :    

Which one of the following reactions does not belong to ''Lassaigne's test''?                [2025]
 

• $\text{Na}+X\underset{\mathit{\Delta }}{\mathit{\to }}\text{NaX}$

   

• $2\text{CuO}+\text{C}\underset{\Delta }{\to }2\text{Cu}+{\text{CO}}_2$

   

• $\text{Na}+\text{C}+\text{N}\underset{\Delta }{\to }\text{NaCN}$

   

• $2\text{Na}+\text{S}\underset{\Delta }{\to }{\text{Na}}_2\text{S}$

   

Q 2 :    

Fehling’s solution ‘A’ is                 [2024]

• aqueous copper sulphate

   

• alkaline copper sulphate

   

• alkaline solution of sodium potassium tartrate (Rochelle’s salt)

   

• aqueous sodium citrate.

   

Q 3 :    

In the following reaction, the product (A) is                    [2014]