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प्रश्न
Write down the “word equation” for the following reaction:
sodium hydroxide solution + zinc → ?
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उत्तर
‘Word equation’
Sodium hydroxide + zinc → Sodium zincate + hydrogen
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
The hydrogen molecule is monovalent.
Complete and balance the following equation:
H2+____________→ 2HCI
Give reason for the following:
Helium replaced hydrogen in weather observation balloons?
MULTIPLE CHOICE QUESTIONS
The name hydrogen was given by
- Cavendish
- Lavoisier
- Haber
- none of these
MULTIPLE CHOICE QUESTIONS
Which is the lightest of all elements?
- hydrogen
- helium
- lithium
- none of these
FILL IN THE BLANK
In nature, hydrogen occurs as a .................. molecule represented as H2
FILL IN THE BLANK
Ammonia is used to make ................
How is hydrogen separated from carbon dioxide and carbon monoxide?
Give a test to differentiate between two gas jars – one containing pure hydrogen and the other hydrogen-air mixture.
With reference to the equation : Cl2 + H2S → 2HCl + S pertaining to a redox reaction – select the correct answer.
Hydrogen sulphide is ______ to sulphur since the reaction involves ______ of hydrogen.
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
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.
Give a reason for the following.
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
