Q36.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements. Reason (R) : Solid Boron has very strong crystalline lattice. In the light of the above statements, choose the most appropriate answer from the options given below ; (1) Both (A) and (R) are correct but (R) Is not the (2) Both (A) and (R) are correct and (R) is the correct explanation of (A) correct explanation of (A) (3) (A) is true but (R) is false (4) (A) is false but (R) is true
What This Question Tests
This question evaluates the understanding of anomalous properties of boron, particularly its high melting point due to its strong covalent network structure.
Concepts Tested
📚 NCERT Sections This Tests
4.11 — Explain Giving Reasons:
Chemistry Class 11 · Chapter 4
4.11 Explain giving reasons: (i) Transition metals and many of their compounds show paramagnetic behaviour. (ii) The enthalpies of atomisation of the transition metals are high. (iii) The transition metals generally form coloured compounds. (iv) Transition metals and their many compounds act as good catalyst.
14.2 — Which Of The Statements Given In Exercise 14.1 Is True For P-Type
Physics Class 12 · Chapter 14
14.2 Which of the statements given in Exercise 14.1 is true for p-type semiconductos.
14.1 — In An N-Type Silicon, Which Of The Following Statement Is True:
Physics Class 12 · Chapter 14
14.1 In an n-type silicon, which of the following statement is true: (a) Electrons are majority carriers and trivalent atoms are the dopants. (b) Electrons are minority carriers and pentavalent atoms are the dopants. (c) Holes are minority carriers and pentavalent atoms are the dopants. (d) Holes are majority carriers and trivalent atoms are the dopants.
📋 Question Details
- Chapter
- p-block Elements
- Topic
- Properties of Boron
- Year
- 2024
- Shift
- 27 Jan Shift 1
- Q Number
- Q36
- Type
- Assertion Reasoning
- NCERT Ref
- Class 11 Chemistry Ch 11: The p-Block Elements
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