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Chemistry Class 12 Chapter 2
S-Block Elements
Test 7
1.
Exothermic heat is provided by?
MgCl
KCl
NaCl
LiCl
2.
The metal which does not react vigorously with halogens to form halides?
Cesium
Calcium
Rubidium
Potassium
3.
Sodium beryllate is formed by the reaction of beryllium and?
NaoH
Na
NaCl
NaBr
4.
Sodium hydrolysed to give?
Exothermic reaction
Endothermic reaction
Redox reaction
None of these
5.
The exceptional trend in boiling and melting points from its group is of?
Boron
Nitrogen
Beryllium
Calcium
6.
Alkali metals are?
Highly electropositive
Highly oxidizing agents
Highly ionizable
Highly reducing agents
7.
Potassium and rubidium form?
Per oxides
Normal oxides
Oxy oxides
Super oxides
8.
Beryllium metal is?
Both have same strength
Softer than iron
None of these
Harder than iron
9.
Due to presence of hydride ion, the ionic hydrides are used as?
Reducing agents
Hygroscopic agents
None of these
Oxidizing agents
10.
The only alkali formed by direct reaction is?
Barium carbide
Sodium carbide
Lithium carbide
Calcium carbide
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