Which of the following compounds are readily soluble in water?
a.
b.
c.
d.
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Choose the correct statements from the following.
a | Beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal |
b. | Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of Be2+ overcomes the lattice enthalpy factor |
c | Beryllium exhibits coordination number more than four |
d | Beryllium oxide is purely acidic in nature |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The alkali metals have low melting point. Which of the following alkali metal is expected to melt if the room temperature rises to ?
1. Na
2. K
3. Rb
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
The order of decreasing ionisation enthalpy in alkali metals is
1. Na>Li>K>Rb
2. Rb<Na<K<Li
3. Li>Na>K>Rb
4. K<Li<Na<Rb
In the synthesis of sodium carbonate, the recovery of ammonia is done by treating with . The by-product obtained in this process is
1.
2.
3.
4.
Metallic elements are described by their standard electrode potential, fusion enthalpy, atomic size, etc. The alkali metals are characterized by which of the following properties?
a. High boiling point
b. High negative standard electrode potential
c. High-density
d. Large atomic size
1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)
Which of the following are the correct reasons for the anomalous behavior of lithium?
a. Exceptionally small size of its atom
b. Its high polarising power
c. It has high degree of hydration
d. Exceptionally low ionisation enthalpy
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Cement, the important building material is a mixture of oxides of several elements. Besides calcium, iron, and sulphur oxides of elements of which of the group(s) are present in the mixture?
1. Group 2
2. Groups 2, 13, and 14
3. Groups 2, and 13
4. Groups 2, and 14