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Q. No.Consider the given two statements:
Assertion (A):
Boron is the hardest element in group 13.
Reason (R):
High lattice enthalpy is due to the strong crystalline lattice.
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.
Both (A) and (R) are false
Subtopic: Boron Family- Preparations, Properties & Uses |
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Which of the following statements is/are correct for allotropes of carbon?
| 1. | Graphite is a conductor of electricity. |
| 2. | Diamond has all sp3 carbon atoms. |
| 3. | Graphite is more stable thermodynamically than diamond. |
| 4. | All of the above. |
Subtopic: Compounds of Carbon, Preparations, Properties & Uses |
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\(BCl_3 \) accepts a lone pair of electrons from \(NH_3 \) to form y. The geometry of y is different from that of \(BCl_3 \). Select the correct option for y and change in geometry from \(BCl_3 \) to y :
1. \(y = BCl_3.NH_3 ~; \) planar to tetrahedral.
2. \(y = BCl_3.NH_3 ~; \) planar to square planar.
3. \(y = B(NH_3)Cl ~Cl_2 ~; \) planar to tetrahedral.
4. \(y = B(NH_2Cl_3) ~HCl ~; \) planar to square planar.
Subtopic: Compounds of Boron- Preparations, Properties & Uses |
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Identify A and B in the following reaction
\(H_{3}BO_{3}\xrightarrow[>370 K]{\Delta } A \xrightarrow[]{\Delta }B\)
1. \(A = HBO_2 , ~B= B_2O_3\)
2. \(A = BH_3 , ~~B= B_2O_3\)
3. \(A =B_2O_3, ~B = HBO_2\)
4. \(A =BH_3, ~B = HBO_2\)
\(H_{3}BO_{3}\xrightarrow[>370 K]{\Delta } A \xrightarrow[]{\Delta }B\)
1. \(A = HBO_2 , ~B= B_2O_3\)
2. \(A = BH_3 , ~~B= B_2O_3\)
3. \(A =B_2O_3, ~B = HBO_2\)
4. \(A =BH_3, ~B = HBO_2\)
Subtopic: Compounds of Boron- Preparations, Properties & Uses |
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Level 2: 60%+
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Out of CCl4, SiCl4, SnCl4, and PbCl4, the compound that will not be easily hydrolyzed by water is:
1. CCl4
2. SiCl4
3. SnCl4
4. PbCl4
1. CCl4
2. SiCl4
3. SnCl4
4. PbCl4
Subtopic: Carbon Family - Preparations, Properties & Uses | Properties of Glass, Pb & Sn compounds |
78%
Level 2: 60%+
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Match List-I with List-II:
Choose the correct answer from the options given below :
| List-I (Compounds) |
List-II (Molecular formula) |
||
| (a) | Borax | (i) | NaBO2+B2O3 |
| (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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NEET - 2022
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The element that does NOT show catenation among the following is :
1. \(\text {Ge}\)
2. \(\text {Si}\)
3. \(\text {Sn}\)
4. \(\text {Pb}\)
1. \(\text {Ge}\)
2. \(\text {Si}\)
3. \(\text {Sn}\)
4. \(\text {Pb}\)
Subtopic: Carbon Family - Preparations, Properties & Uses |
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Consider the given two statements:
| Assertion (A): | CCl4 is insoluble in water while SiCl4 is soluble in water. |
| Reason (R): | Si in SiCl4 can accommodate the lone pair of electrons in d-orbitals obtained from the oxygen atom of water molecules. |
| 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 |
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Given below are two statements:
| Statement I: | Silicones are surrounded by non-polar alkyl groups, thus water-repelling in nature. |
| Statement II: | The starting materials for the manufacturing of silicones are alkyl or aryl-substituted silicon chlorides. |
| 1. | Both Statement I and Statement II are correct. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Statement I is correct but Statement II is incorrect. |
| 4. | Statement I is incorrect but Statement II is correct. |
Subtopic: Properties of Structure of SiO2 & Other Compounds |
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Assertion(A): Fullerene are purest allotrope of C.
Reason(R): They do not have dangling edge which attracts others atoms.
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 statement but R is false.
4. Both A and R are false statements.
Reason(R): They do not have dangling edge which attracts others atoms.
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 statement but R is false.
4. Both A and R are false statements.
Subtopic: Structure & Properties of Allotropes of C |
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Level 1: 80%+
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