An alkaline earth metal sulphate that has hydration enthalpy higher than the lattice enthalpy is -
1. CaSO4
2. BeSO4
3. BaSO4
4. SrSO4
Property of the alkaline earth metals that increases with their atomic number is -
1. Solubility of their hydroxides in water.
2. Solubility of their sulphates in water.
3. Ionisation energy.
4. Electronegativity.
The strongest factor responsible for reducing action of Li metal in an aqueous solution is :
1. Sublimation enthalpy .
2. Ionisation enthalpy.
3. Hydration enthalpy .
4. Electron-gain enthalpy.
The effect of addion of gypsum to cement is-
1. It reduces the setting time of cement .
2. The setting time of cement increases.
3. The colour of cement becomes light .
4. A shining surface is obtained.
A compound (A) is used in the preparation of washing soda to recover ammonia in Solvay's process. When CO2 is bubbled through an aqueous solution of (A), the solution turns milky. It is used in whitewashing due to its disinfectant nature. The chemical formula of A is :
1.
2. CaO
3.
4.
is preferred over NaCl for clearing ice on roads particularly in very cold countries. This is because:
1. is less soluble in than NaCl.
2. is hygroscopic but NaCl is not.
3. Eutectic mixture of freezes at while that of freezes at .
4. NaCl makes the road slippery but does not.
The incorrect statement among the following is-
1. The milk of magnesia used as an antacid is chemically
2. Stability of alkali metal peroxides increases with an increase in atomic number.
3. Hydration energy of AgF is higher than its lattice energy.
4. Anhydrous cannot be prepared by direct heating of .
The incorrect statement among the following regarding Beryllium is-
1. It is rendered passive by nitric acid.
2. lt forms Be2C
3. It's salts rarely hydrolyze.
4. It's hydride is electron-deficient and polymeric.
The suspension of slaked lime in water is known as -
1. Limewater.
2. Quicklime.
3. Milk of lime.
4. Aqueous solution of slaked lime.
The property of alkali metals that increases with increasing atomic number is -
1. First ionization energy.
2. Electronegativity.
3. Hydration energy of the univalent ion.
4. Atomic radius.