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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.
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
Fill in the blank
Hydrogen is ...................soluble in water.
What is noticed if the products are not allowed to escape?
For laboratory preparation of hydrogen, give the following:
chemical equation
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Complete and balance the following reaction.
Fe + H2O →_____________ +___________
Select the correct options for the following statement:
A metal which reacts with water to give a metallic hydroxide & liberate hydrogen.
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.
Give a balanced equation for the following conversion.
\[\ce{CO + H2<-H2O->CO2 + H}\]
Give a reason for the following.
Granulated zinc is preferred to metallic zinc in the preparation of hydrogen using dilute acid.
