Nitric Acid

1. Choose the correct word from the brackets to complete the sentence. Sodium nitrate reacts with ____ sulphuric acid to produce nitric acid

• dilute
• concentrated
• BOTH CONC & DIL.
• NONE

2.Which compounds are required for the laboratory preparation of nitric acid?

• Sodium nitrate
• sulphuric acid
• SODIUM NITRATE & CONC. SULPHURIC ACID
• NONE

3.The first step in the manufacture of HNO3 is the catalytic oxidation of NH3. Name the catalyst used.

• Platinum
• Iron
• Vanadium pentoxide
• Palladium

4. When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate, what is the special feature of the apparatus used.

• All the plastic apparatus is used
• All the rubber apparatus is used
• All the glass apparatus is used
• NONE

5.State why a yellow colour appears in conc. Nitric acid when left standing in an ordinary glass bottle.

• Nitric acid decomposes to give reddish brown NO2 gas
• NO2 dissolves in nitric acid to give a yellowish brown colour.
• Nitric acid decomposes to give reddish brown NO2 gas & NO2 dissolves in nitric acid to give a yellowish brown colour.
• NONE