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प्रश्न
Explain the following:
Two jars of H2 are collected – “one burns quietly and the other does not”.
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उत्तर
‘One burn quietly’ is pure hydrogen, and ‘which does not bum quietly’ is mixed hydrogen with air. It explodes on burning.
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संबंधित प्रश्न
Complete and balance the following equation:
H2+____________→ 2HCI
MULTIPLE CHOICE QUESTIONS
The name hydrogen was given by
- Cavendish
- Lavoisier
- Haber
- none of these
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In nature, hydrogen occurs as a .................. molecule represented as H2
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The compounds of carbon and hydrogen are called .................
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Hydrogen is present abundantly in the ................
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Ammonia is used to make ................
Write the balanced equation and give your observation when the following metal reacts:
Sodium with cold water
Write the balanced equation and give your observation when the following metal reacts:
Magnesium with steam
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
How is hydrogen separated from carbon dioxide and carbon monoxide?
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen is a combustible gas.
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen does not support combustion.
With reference to the equation : Cl2 + H2S → 2HCl + S pertaining to a redox reaction – select the correct answer.
Chlorine is ______ to HCl.
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:
Hydrogen and oxygen
What do the following symbols [or formula] denote : 2H ; H2 ; H+. [two atoms, molecule, ion]
Write down the “word equation” for the following reaction:
sodium hydroxide solution + zinc → ?
Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
