Lattice energy is lowest for –
1. LiF
2. NaCl
3. KBr
4. CsI
MgO is a-
(1) Acidic oxide
(2) Basic oxide
(3) Neutral oxide
(4) Amphoteric oxide
Which of the following statements is wrong ?
(1) Lithium nitrate on heating gives lithium nitrite and .
(2) Sodium oxide, is obtained on heating sodium azide with sodium nitrite.
(3) Potassium cyanide dissolves silver in presence of air or .
(4) Potassium formate is formed when moist reacts with potassium hydride.
Ionic conductances of hydrated M+ ions are in the order-
(1)
(2)
(3)
(4)
Among the following groups of oxides, the group containing oxides that cannot be reduced by carbon to give the respective metals is –
(1) PbO,
(2) CaO,
(3)
(4)
The number of crystal water in Gypsum, Plaster of Paris and Epsom salt respectively are-
1. 2, 0.5, 7
2. 7, 2, 1
3. 7, 0.5, 2
4. 3, 4, 2
Which of the following statement is false regarding saline hydrides –
1. They conduct electricity in molten state
2. They dissolve in water and liberate
3. They are used as reducing agents
4. They are covalent in nature
An amphoteric oxide among the following is-
1. CaO
2. SrO
3. BeO
4. MgO
The incorrect statement among the following regarding Lithium is that-
1. The hydroxide, carbonate and nitrate decompose to give the oxide on heating.
2. It is the most electronegative element of group IA.
3. The hydrogen carbonate cannot be isolated as a stable solid.
4. It forms superoxide.
Which one of the following is most stable in ether-
(1)
(2)
(3)
(4) None of these