Advertisements
Advertisements
Question
What do the following symbols represent : 2H and H2.
Advertisements
Solution
2H → represents → 2 atoms of hydrogen
H2 → represents → 1 molecule of hydrogen
APPEARS IN
RELATED QUESTIONS
Indicate which of the following statement is true and which is false:
The hydrogen molecule is monovalent.
Give a balanced chemical equation for the reaction.
MULTIPLE CHOICE QUESTIONS
Which is the lightest of all elements?
- hydrogen
- helium
- lithium
- none of these
FILL IN THE BLANK
The compounds of carbon and hydrogen are called .................
Why is hydrogen called a reducing agent? Give chemical equation to support your answer ?
Write the balanced equation and give your observation when the following metal reacts:
Calcium with cold water
Give the balanced equation of the reaction.
Choose the correct option:
The composition of the nucleus of deuterium is
Choose terms from the options given in brackets to complete this sentence.
A metal …………….. hydrogen in the activity series gives hydrogen with …………… acid or …………… acid.
(above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen does not support combustion.
Give balanced equation for the following conversion:
Water gas to hydrogen – industrially.
Give reason for the following:
The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.
Give a chemical test to distinguish between the following gases:
Ammonia and hydrogen chloride
How can you obtain hydrogen from sodium hydroxide [not by electrolysis].
Write balanced equation for the following reaction:
magnesium + dil. hydrochloric acid → ___
Name a gas which burns in air or oxygen forming water.
How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis?
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
