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प्रश्न
Give reason for the following:
A pop sound produced when hydrogen is burnt?
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उत्तर
Impure hydrogen gas burns in air with a pop sound. This is because of the presence of impurities in it.
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संबंधित प्रश्न
Give a balanced chemical equation for the reaction.
State four uses of hydrogen:
MULTIPLE CHOICE QUESTIONS
The name hydrogen was given by
- Cavendish
- Lavoisier
- Haber
- none of these
FILL IN THE BLANK
In nature, hydrogen occurs as a .................. molecule represented as H2
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).
With reference to the equation : Cl2 + H2S → 2HCl + S pertaining to a redox reaction – select the correct answer.
Chlorine is ______ to HCl.
Write balanced equation for the following reaction:
magnesium + dil. hydrochloric acid → ___
Write correctly the balanced equation for the following:
‘When zinc filings are added to a concentrated solution of sodium hydroxide’.
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
Give balanced equation for obtaining hydrogen from cold water using a monovalent active metal.
