Please select a subject first
Advertisements
Advertisements
TRUE \ FALSE
Hydrogen does not combine with nitrogen under ordinary conditions.
Concept: undefined >> undefined
TRUE \ FALSE
reacts with hot water to form copper oxide and hydrogen.
Concept: undefined >> undefined
Advertisements
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 |
Concept: undefined >> undefined
Hydrogen gas is collected by the downward displacement of water. Give reason ?
Concept: undefined >> undefined
How do different metals displace hydrogen from water? Explain with the help of equations.
Concept: undefined >> undefined
Give two uses for the following:
coke
Concept: undefined >> undefined
State how hydrogen occurs in the free state. Name three compounds containing hydrogen in the combined state.
Concept: undefined >> undefined
‘Hydrogen is obtained by electrolysis of acidified water’.
Answer the following pertaining to the preparation of hydrogen by electrolysis,
The meaning of the term ‘electrolysis’ and ‘electrolyte’.
Concept: undefined >> undefined
‘Hydrogen is obtained by electrolysis of acidified water’.
Answer the following pertaining to the preparation of hydrogen by electrolysis,
Name the electrode –
- through which the current enters the electrolyte.
- at which hydrogen is liberated.
Concept: undefined >> undefined
Starting from hydrogen gas how would you obtain a neutral liquid.
Concept: undefined >> undefined
Starting from hydrogen gas how would you obtain a basic gas.
Concept: undefined >> undefined
Starting from hydrogen gas how would you obtain a metal by reduction of its heated oxide.
Concept: undefined >> undefined
Give reason for the following:
In the preparation of hydrogen by electrolysis of water – the distilled water used is acidified.
Concept: undefined >> undefined
Select the correct options for the following statement:
A metal which reacts with water to give a metallic hydroxide & liberate hydrogen.
Concept: undefined >> undefined
Select the correct options for the following statement:
The metal used as a catalyst in hydrogenation of oils.
Concept: undefined >> undefined
Select the correct options for the following statement:
The metal which reacts with steam liberating hydrogen & the reaction is reversible.
Concept: undefined >> undefined
Select the correct options for the following statement:
The metallic compound formed when a metal above aluminium in the activity series reacts with steam.
Concept: undefined >> undefined
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
Concept: undefined >> undefined
Select the correct options for the following statement:
A foul smelling gas formed when hydrogen reacts with a molten non-metal, is ___.
Concept: undefined >> undefined
Select the correct options for the following statement:
The product formed on combustion of hydrogen in air is ___.
Concept: undefined >> undefined
