Practice Paper 5

Name the process by which oxygen is released in the atmosphere.

Name the solvent for sulphur.

Name the colourless gas having burning sulphur smell which turns lime water milky.

Salt $\text{'}\mathrm{A}\text{'}$ on heating gives a reddish brown coloured gas $\text{'}\mathrm{B}\text{'}$, a colourless, odourless gas $\text{'}\mathrm{C}\text{'}$  and a residue $\text{'}\mathrm{D}\text{'}$, yellow when hot and white when cold. Identify $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$.

Salt $\text{'}\mathrm{A}\text{'}$ on heating gives a reddish brown coloured gas $\text{'}\mathrm{B}\text{'}$, a colourless, odourless gas $\text{'}\mathrm{C}\text{'}$  and a residue $\text{'}\mathrm{D}\text{'}$, yellow when hot and white when cold. Give an equation for the above reaction. 

Salt $\text{'}\mathrm{A}\text{'}$ on heating gives a reddish brown coloured gas $\text{'}\mathrm{B}\text{'}$, a colourless, odourless gas $\text{'}\mathrm{C}\text{'}$  and a residue $\text{'}\mathrm{D}\text{'}$, yellow when hot and white when cold. Give confirmatory tests of gas $\text{'}\mathrm{B}\text{'}$ and gas $\text{'}\mathrm{C}\text{'}$.

Name the table or chart in which elements are arranged in periods or groups.

What is gram molecular mass?