Which of the following is the correct statement?

1. Ga+ is more stable than ln+.
2. Al+ is more stable than ln+.
3. Ga+ is more stable than Al+.
4. Al+ is more stable than Ga+.

Subtopic:  Boron Family- Preparations, Properties & Uses |
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The chain length of silicones can be controlled by adding
1.  \(CH_3SiCl_3\)
2.  \(SiCl_4\)
3.  \((CH_3)_2SiCl_2\)
4.  \((CH_3)_3SiCl\)

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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Match List-I with List-II :
List-I
(Compounds)
List-II
(Molecular formula)
(a) Borax (i) NaBO2
(b) Kernite (ii) Na2B4O7.4H2O
(c) Orthoboric acid (iii) H3BO3
(d) Borax bead (iv) Na2B4O7.10H2O
Choose the correct answer from the options given below :
(a) (b) (c) (d)
1. (iv) (ii) (iii) (i)
2. (ii) (iv) (iii) (i)
3. (iii) (i) (iv) (ii)
4. (i) (iii) (iv) (ii)
Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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\(Na_2B_4O_7\xrightarrow{\text{ heat }~~}X+NaBO_2\)
in the above reaction the product "X" is :
1.  H3BO3
2.  B2O3
3.  Na2B2O5
4.  NaB3O5
Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Choose the correct statement:
1. Both diamond and graphite are used as dry lubricants.
2. Diamond and graphite have a two-dimensional network.
3. Diamond is covalent and graphite is ionic.
4. Diamond is sp³ hybridised and graphite is sp² hybridized.
Subtopic:   Structure & Properties of Allotropes of C |
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Which of the following statement is not correct about diborane?
1. Both the Boron atoms are sp2 hybridised.
2. There are two 3-centre-2-electron bonds.
3. The four terminal B-H bonds are two centre two electron bonds.
4. The four terminal Hydrogen atoms and the two Boron atoms lie in one plane.
Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Which of the following oxide is amphoteric in nature?

1. SnO2

2. SiO2

3. GeO2

4. CO2

Subtopic:  Carbon Family - Preparations, Properties & Uses |
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Identify the correct statements from the following:

a. CO2(g) is used as a refrigerant ice-cream and frozen food.

b. The structure of C60 customs12 six carbon rings and 25 five carbon rings

c. ZSM-5, a type of zeolite, is used to convent alcohol into gasoline.

d. CO is a colorless and odorless gas

1. (a) and (c) only

2. (b) and (c) only

3. (c) and (d) only

4. (a), (c) and (c) only

Subtopic:  Carbon Family - Preparations, Properties & Uses | Compounds of Carbon, Preparations, Properties & Uses |
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Which of the following compounds is used in cosmetic surgery?

1. Silica

2. Silicates

3. Silicones

4. Zeolites

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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Aluminium chloride in acidified aqueous solution forms a complex 'A'. The formula of A and hybridisation state of Al in 'A' is respectively-

1. [Al(H2O)6]3+, sp3d2

2. [Al(H2O)4]3+, sp3

3. [Al(H2O)4]3+, dsp2

4. [Al(H2O)]3+, d2sp3

Subtopic:  Boron Family- Preparations, Properties & Uses |
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