Tests for Nitric Acid

Q.

What is the effect of Nitric Acid on methyl orange ?

1. Does not change colour.

2. It turns from orange to pink.

3. It turns from pink to orange.

4. It turns from orange to yellow.

Q.

What will you observe when a methyl orange drop is added to dilute hydrochloric acid?

Q. In the Lassaigne's test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of ?

1. $F{e}_4\left[Fe\right(CN{)}_6{]}_3$
2. $N{a}_4\left[Fe\right(CN{)}_6]$
3. $F{e}_3\left[Fe\right(CN{)}_6{]}_4$
4. $F{e}_2\left[Fe\right(CN{)}_6]$

Q. Write the mechanism involved in the bromination of salicylic acid.

Q.

What is the role of concentrated $H_{2}S{O}_4$ in the laboratory preparation of nitric acid?

1. More volatile base

2. Less volatile base

3. Less volatile acid

4. More volatile acid

Q. In cobalt nitrate test Zn and Mg gives :

1. blue and green colour
2. green and pink colour
3. green and blue colour
4. none of the above

Q. The pungent odour gas in the previous reaction is ___.

1. $HCl$
2. $C{O}_2$
3. $C{H}_4$
4. $C{l}_2$

Q. A water soluble salt when treated with dilute hydrochloric acid produces brisk effervescence . The gas evolved turns lime water milky but has no effect on acidified potassium dichromate .the salt produce a white ppt. when treated with NaOH solution which remains insoluble in excess . Identify the cation and the anion present i the salt .

Q. Match each of the reactions given in List 1 with the corresponding product(s) given in List 2.

Q. Choose the correct statement(s) from the options given below.​

1. The reaction of NaCl with $H_{2}S{O}_4$ above $200°C$ gives sodium bisulphate as by-product.​
2. The reaction of rock salt with conc. sulphuric acid gives HCl.​
3. Inverted funnel is used to avoid back suction during preparation of aqueous HCl.​
4. The reaction of common salt with sulphuric acid is used in the laboratory preparation of hydrochloric acid.​

Q. What happens when?
Red lead is treated with nitric acid.

Q. Reactants of superphosphate are mixed in a ____________ chamber with a mechanical stirrer and two valves at the bottom.

1. cast iron
2. stainless steel
3. mild stainless steel
4. copper