The p-Block Elements

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Question

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Question 1 :

Aluminium (III) chloride forms a dimer because

1. Higher coordination number can be achieved by aluminium
2. Aluminium has high ionization energy
3. Aluminium belongs to III group
4. It cannot form a trimer
Answer
5554

Question 2 :

The chief source of iodine in which it is present as sodium iodate is

1. Sea weeds
2. Caliche
3. Carnallite
4. Iodine never exists as sodium iodate
Answer
5555

Question 3 :

Moissan boron is

1. Amorphous boron of ultra purity
2. Crystalline boron of ultra purity
3. Amorphous boron of low purity
4. Crystalline boron of low purity
Answer
5556

Question 4 :

The effective component of bleaching powder is ..... of calcium

1. Chlorine
2. Bromine
3. Aluminium
4. Calcium
Answer
5557

Question 5 :

Which metal burn in air at high temperature with the evolution of much heat

1. Cu
2. Hg
3. Pb
4. Al
Answer
5558