The reason for the small radius of Ga compared to Al is-.

a.  Poor screening effect of d and f orbitals

b.  Increase in nuclear charge

c.  Presence of higher orbitals

d.  Higher atomic number

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Boron Family- Preparations, Properties & Uses |
 83%
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Match the species given in Column I with the properties mentioned in Column II.

Column I          Column II
A.  \(\text{BF}^-_4\) 1. Oxidation state of the central atom is +4
B.  AlCl3 2. Tetrahedral shape
C.  SnO 3. Lewis acid
D.  PbO2 4. Can be further oxidized

Codes

A B C D
1. 2 3 4 1
2. 1 2 3 4
3. 1 4 3 2
4. 4 1 3 2
Subtopic:  Boron Family- Preparations, Properties & Uses |
 84%
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The element which exists in a liquid state for a wide range of temperatures
and can be used for measuring high temperature is:

1. B

2. Al

3. Ga

4. In

Subtopic:  Boron Family- Preparations, Properties & Uses |
 82%
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Which of the following is a Lewis acid?

1. AlCl3

2. MgCl2

3. CaCl2

4. BaCl2

Subtopic:  Boron Family- Preparations, Properties & Uses |
 92%
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Match the species given in Column I with properties given in Column II.

Column I          Column II
A. Diborane 1. Used as a flux for soldering metals
B.  Quartz 2. Crystalline form of silica
C. Borax 3. Banana bonds
D. Aluminosilicate 4. Used as a catalyst in petrochemical industries
Codes
A B C D
1. 3 4 1 2
2. 1 2 3 4
3. 3 2 1 4
4. 4 1 3 2
Subtopic:  Boron Family- Preparations, Properties & Uses |
 71%
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