Q48.Among the following reactions of hydrogen with halogens, the one that requires a catalyst is: (1) H2 + Cl2 →2 HCl (2) H2 + I2 →2 HI (3) H2 + F2 →2 HF (4) H2 + Br2 →2 HBr
What This Question Tests
This question tests knowledge of the relative reactivity of halogens with hydrogen and the specific conditions, such as the need for a catalyst, required for their reactions.
Concepts Tested
📚 NCERT Sections This Tests
6.22 — What Happens When
Chemistry Class 12 · Chapter 6
6.22 What happens when (i) n-butyl chloride is treated with alcoholic KOH, (ii) bromobenzene is treated with Mg in the presence of dry ether, (iii) chlorobenzene is subjected to hydrolysis, (iv) ethyl chloride is treated with aqueous KOH, (v) methyl bromide is treated with sodium in the presence of dry ether, (vi) methyl chloride is treated with KCN? Answers to Some Intext Questions 6.1 6.2 (i) H2SO4 cannot be used along with KI in the conversion of an alcohol to an alkyl iodide as it converts KI to corresponding acid, HI which is then oxidised by it to I2. 6.3 (i) ClCH2CH2CH2Cl (ii) ClCH2CHClCH3 (iii) Cl2CHCH2CH3 (iv) CH3CCl2CH3 191 Haloalkanes and Haloarenes Reprint 2025-26
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Chemistry Class 12 · Chapter 7
7.6 Give structures of the products you would expect when each of the following alcohol reacts with (a) HCl –ZnCl2 (b) HBr and (c) SOCl2. (i) Butan-1-ol (ii) 2-Methylbutan-2-ol
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
📋 Question Details
- Chapter
- Hydrogen
- Topic
- Reactions of hydrogen with halogens
- Year
- 2019
- Shift
- 10 Jan Shift 2
- Q Number
- Q48
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 9: Hydrogen
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