Which of the following compounds are readily soluble in water?

a.  ${\mathrm{BeSO}}_4$

b.  ${\mathrm{MgSO}}_4$

c.  ${\mathrm{BaSO}}_4$

d.  ${\mathrm{SrSO}}_4$

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged with which of the following ion(s)?

a.  ${\mathrm{H}}^{+}$ ions

b.  ${\mathrm{Mg}}^{2+}$ ions

c.  ${\mathrm{Ca}}^{2+}$ ions

d.  ${\mathrm{SO}}_4^{2-}$ ions

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Choose the correct statements from the following.

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Match the elements given in Column I with the properties mentioned in Column II.

Codes

Match the elements given in Column I with the color they impart to the flame given in Column II.

Codes

 Given below are two statements: 

Given below are two statements: 

The alkali metals have low melting point. Which of the following alkali metal is expected to melt if the room temperature rises to $30°\mathrm{C}$?

1. Na

2. K

3. Rb

4. Cs

The alkali metal that reacts with water least vigorously is -

1. Li

2. Na

3. K

4. Cs

The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.

1. Sublimation enthalpy

2. Ionisation enthalpy

3. Hydration enthalpy

4.  Electron-gain enthalpy