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प्रश्न
Give reason for the following:
The end of the thistle funnel should be dipped under acid.
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उत्तर
The end of the thistle funnel should be dipped under acid so as to prevent the gas from escaping from the thistle funnel.
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संबंधित प्रश्न
Fill in the blank
Hydrogen is ...................soluble in water.
A metal ______ hydrogen in the reactivity series gives hydrogen with ______.
For laboratory preparation of hydrogen, give the following:
materials used
For laboratory preparation of hydrogen, give the following:
method of collection
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Select the correct options for the following statement:
A metal which reacts with water to give a metallic hydroxide & liberate hydrogen.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An efflorescent substance which leaves a residue having the same colour as the substance and evolves a gas which changes the colour of cobalt chloride paper.
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen sulphide
