Reaction of Bases with Dil. Sulphuric Acid

Q.

A reddish brown vessel developed a green coloured solid X when left open for a long time When reacted with dil $H{}_{2}SO{}_4$ (sulphuric acid) it forms a blue coloured solution along with brisk effervescence due to colourless and odourless gas Z .X decomposes to form a black coloured oxide Y of a reddish brown metal along with gas Z Identify X Yand Z

Q. A yellow colored compound'X'is a photo sensitive material on exposure to light it gives substance 'Y' and brown fumes of a gas'z'. Identify x, y, z. Write the balanced chemical equation for the reaction.

Q.

The product obtained when Iron reacts with dilute sulphuric acid is :

1. Ferrous sulphate

2. Ferric sulphate

3. Ferrous oxide

4. Ferric oxide

Q. On heating green coloured ferrous sulphate crystals, a reddish brown solid is left out and the smell of a gas having the odour of burning sulphur is obtained. Identify the type of reaction involved.

1. Combustion
2. Thermal Decomposition
3. Electrolytic Decomposition
4. Displacement

Q.

The burning of magnesium strip resutls in the formation of magnesium oxide. What wil happen if we dissolve this magnesium oxide in sulphuric acid?

1. Precipitate formation

2. Salt and water

3. Salt and Hydrgen gas

4. Salt and Hydrogen sulphide gas

Q.

Iron(II) oxide reacts with acid X to form ferrous sulphate and water. X is __.

Q.

The reaction in which heat energy is evolved:

1. Endothermic reactions

2. Exothermic reaction

3. Enthalpy change reactions

4. None of the above

Q. Write balanced equations and name the products formed when: [4 MARKS]
(a) sodium hydrogen carbonate is added to nitric acid,
(b) cupric oxide reacts with nitric acid,
(c) zinc reacts with dilute nitric acid,
(d) concentrated nitric acid is heated.

Q.

Give the action of acids with carbonates and hydrogen carbonates:

Na₂CO₃ + HCl 🡪

Q. What is the product formed when iron(2) & (3) oxide reacts with sulphuric acid dilute each?

Q.

Which of the following reactions does not release any gas as product?

1. Sulphuric acid with ferrous oxide

2. Sulphuric acid with sodium sulphite

3. Sulphuric acid with sodium carbonate

4. Sodium sulphide with sulphuric acid

Q.

The product obtained when Iron reacts with dilute sulphuric acid is :

1. Ferrous oxide

2. Ferric oxide

3. Ferrous sulphate

4. Ferric sulphate

Q. When magnesium oxide reacts with $HCl$, it gives:

1. $H_{2}O$
2. salt and water
3. $O_2$
4. $MgC{l}_2$

Q. Complete the following reaction:
$2\mathrm{NaOH}\left(\mathrm{aq}\right)+H_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to$

1. ${\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)$
2. ${\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+2H_{2}S\left(g\right)$
3. ${\mathrm{Na}}_{2}O\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)$
4. ${\mathrm{Na}}_{2}O\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)+{\mathrm{SO}}_2\left(g\right)$

Q. Complete the following neutralisation reaction:
+ $AgOH\left(s\right)\to$ $AgI\left(s\right)$ + $H_{2}O\left(l\right)$

1. $NaI\left(aq\right)$
2. $HI\left(aq\right)$
3. $KI\left(aq\right)$

Q. What property of hydrogen is observed in the following experiments.
When black cupric oxide is heated in a stream of hydrogen, reddish
colour is obtained.

Q. Complete the following reaction:
$2\mathrm{NaOH}\left(\mathrm{aq}\right)+H_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to$

1. ${\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)$
2. ${\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+2H_{2}S\left(g\right)$
3. ${\mathrm{Na}}_{2}O\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)+{\mathrm{SO}}_2\left(g\right)$
4. ${\mathrm{Na}}_{2}O\left(\mathrm{aq}\right)+2H_{2}O\left(l\right)$