Borax bead test is responded by:

1.  Divalent metals

2.  Heavy metals

3.  Light metals

4.  Metal which forms coloured metaborates

Subtopic:  Boron Family- Preparations, Properties & Uses |
 84%
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Reactivity of borazole is greater than that of benzene because:

1.  borazole is non-polar compound

2.  borazole is polar compound

3.  borazole is electron deficient compound

4.  of localized electron in it

Subtopic:  Boron Family- Preparations, Properties & Uses |
 50%
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Inorganic benzene is:

1. BN

2. BF4

3. B2H6

4. B3N3H6

Subtopic:  Boron Family- Preparations, Properties & Uses |
 86%
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Diborane does not undergo cleavage reaction with:

1.  trimethyl amine

2.  ammonia

3.  CO

4.  CO2

Subtopic:  Boron Family- Preparations, Properties & Uses |
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Fluorine is more electronegative than either boron or phosphorus. What conclusion can be drawn from the fact that BF3 has no dipole moment but PF3 has?

1.  BF3 is spherically symmetrical, PF3 is not

2.  BF3 molecule must be linear

3.  The atomic radius of P is larger than the atomic radius of B

4.  The BF3 molecule must be planar triangular

Subtopic:  Boron Family- Preparations, Properties & Uses |
 67%
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Borazine is obtained by reaction of:

1.  NH3+B2H6 in 2 : 1 ratio

2.  NH3+B2H6 in 1 : 2 ratio

3.  NH3+B2H6 in 1 : 4 ratio

4.  NH3+B2H6 in 4 : 1 ratio

Subtopic:  Boron Family- Preparations, Properties & Uses |
 64%
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Boric acid is not used:

1. As an antiseptic

2. As a flux in soldering

3. In making optical glasses

4. In making enamels and pottery glazes

Subtopic:  Boron Family- Preparations, Properties & Uses |
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An incorrect statement among the following regarding Al2Cl6 is:

1. Four  Al — Cl  bonds are of same length and two of different length
2. Six  Al — Cl  bonds are of same length and two of different length
3. The angle  Cl — Al — Cl  is  110° and  93°
4. The angle  Al — Cl — Al  is  87°
Subtopic:  Boron Family- Preparations, Properties & Uses |
 62%
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Heating an aqueous solution of aluminium chloride to dryness will give:

1.  AlCl3

2.  Al2Cl6

3.  Al2O3

4.  AlOHCl2

Subtopic:  Boron Family- Preparations, Properties & Uses |
 52%
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Carbon dioxide is a gas but silica is a solid because:

1.  carbon dioxide is composed of discrete covalent CO2 molecules whereas silica has continuous

     tetrahedral structure

2.  CO2 molecules are lighter than SiO2 molecules

3.  CO2 is more acidic than SiO2

4.  melting point of silica is very high

Subtopic:  Compounds of Carbon, Preparations, Properties & Uses |
 79%
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