Given below are two statements: 

Assertion (A): [SiF6]2– is known whereas [SiCl6]2– is not.
Reason (R): Cl atom causes higher steric hindrance.


 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.




 

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 86%
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Consider the following statements

(i).  Carbon form the most acidic dioxide among the oxide of group 14.
(ii).  Pb mostly found in the +2 oxidation state.
(iii).  Only silicon used as a semiconductor.


Identify the correct statement(s):

1. Only iii

2. i, ii

3. ii, iii

4. Only ii

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 80%
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Given below are two statements: 

Assertion (A): Boric acid is considered a weak acid.
Reason (R): Boric acid is not able to release H+ ions on its own.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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The correct statements among I to III regarding group 13 element oxides are:
(I) Boron trioxide or diboron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.
1. (I) and (II) only
2. (I) and (III) only
3. (II) and (III) only
4. (I), (II), and (III) only

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

A. Boron in [B(OH)4]- i. sp2
B. Aluminium in [Al(H2O)6]3+ ii. sp3
C. Carbon in Buckminsterfullerene iii. sp3d2
D. Germanium in [GeCl6]2-

Codes

Options:  A   B   C   D 
1.  ii  iii  i iii
2.  i   i  iii  ii
3. iii  ii ii i
4.  i  iii  ii  iii
Subtopic:   Structure & Properties of Allotropes of C | Properties of Structure of SiO2 & Other Compounds |
 87%
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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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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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Which of the following statements are correct?

(Answer on the basis of the given figure.)


 

a. The two bridged hydrogen atoms and the two boron atoms lie in one plane
b. Out of six B-H bonds, two bonds can be described in terms of 3-center-2-electron bonds
c. Out of six B-H bonds, four B-H bonds can be described in terms of 3 center 2 electron bonds
d.  The four-terminal B-H bonds are two center-two electron angular bonds

Choose the correct option

1. (a, b, c)
2. (b, c, d)
3. (a, c, d)
4. (a, b, d)

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
 61%
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The correct statements among the following are-

a. Fullerenes have dangling bonds
b. Fullerenes are cage-like molecules
c. Graphite is thermodynamically most stable allotrope of carbon
d. Graphite is slippery and hard and therefore used as a dry lubricant in machines.


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:   Structure & Properties of Allotropes of C |
 71%
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Assertion (A): SnO is more reactive towards acid than SnO2.
Reason (R): Both SnO and SnO2 are amphoteric oxides.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
 
Subtopic:  Properties of Glass, Pb & Sn compounds |
 57%
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