The compound among the following that used in cosmetic surgery is:

1. Silica

2. Silicates

3. Silicones

4. Zeolites

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 68%
From NCERT
NEET - 2019
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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 |
 78%
From NCERT
NEET - 2019
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Which of the following species is not stable?

1. SiCl62-

2. SiF62-

3. GeCl62-

4. SnOH62-

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 58%
From NCERT
NEET - 2019
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The incorrect statement among the following is:

1.  SnF4 is ionic in nature.

2.  PbF4 is covalent in nature.

3.  SiCl4 is easily hydrolysed.

4.  GeX4 (X=F, Cl, Br, I) is more stable than GeX2

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 62%
From NCERT
NEET - 2019
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Identify the correct statements from the following:

a. \(\mathrm{CO}_2(\mathrm{~g})\) is used as a refrigerant ice cream and frozen food.
b. The structure of \(\mathrm{C}_{60} \)  customs12 six carbon rings and 25 five carbon rings
c. ZSM-5, a type of zeolite, is used to convert 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 (d) only
Subtopic:  Carbon Family - Preparations, Properties & Uses | Compounds of Carbon, Preparations, Properties & Uses |
 58%
From NCERT
NEET - 2020
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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 |
 66%
From NCERT
NEET - 2020
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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 |
 65%
From NCERT
NEET - 2022
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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 |
 83%
From NCERT
NEET - 2022
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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 |
 79%
From NCERT
NEET - 2022
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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 |
 71%
From NCERT
NEET - 2022
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