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प्रश्न
State the electronic configuration of hydrogen [at. no. 1].e
Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table.
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उत्तर
Electronic configuration of hydrogen is 1 i.e. it has le, IP in nucleus. Hydrogen can be placed in group 1[1A] as it forms a positive ion as in HC1 like alkali metals H
- 1e- → H1+
Li - 1e- → Li1+ Na - 1e- = Na1+
It can be placed in group 17 [VIIA]
As it can form a negative ion as in NaH like Halogens H + 1e- → H1-
Cl + 1e- → Cl1-
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संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Hydrogen burns in oxygen to form
- hydrogen sulphide
- nitrates
- water
- ammonia
TRUE \ FALSE
Hydrogen does not combine with nitrogen under ordinary conditions.
MATCH THE COLUMNS
| column A | column B |
| 1. `""2H_2 + O_2 → 2H_2O` | A. This reaction is not possible |
| 2. `""H_2+CI_2 →2HCI` | B.This reaction is exothermic to the extent of explosion |
| 3.`""ZaO+ H^2→Zn +H_2O` | C.This reaction is known as Haber process |
| 4.`""Cu + H_2SO^4 → CuSO_4 + H_2 ` | D.This reaction illustrates the reducing property of bydrogen |
| 5.`""N_2 +3H_2 → 2NH_3 +heat ` | E. This reaction takes place in diffused sunlight |
| F. This reaction is a method of preparation of hydrogen |
What is noticed if the products are not allowed to escape?
Which test should be made before collecting hydrogen in a gas jar?
Complete and balance the following reaction.
Fe + HCl →_____________ +___________
Name an element whsich reacts violently with water at room temperature.
Account for the following fact:
Potassium and sodium are not used to react with dilute ‘hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.
How did the name ‘hydrogen’ originate? How does hydrogen occur in the combined state?
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
