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प्रश्न
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.
A white substance which leaves an amphoteric oxide as a residue [whose colour varies in the heated and in the cold state] and evolves a gas which turns lime water milky.
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उत्तर
Zinc carbonate [ZnCO3].
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संबंधित प्रश्न
Name the following:
Two metals which give hydrogen with cold water.
MULTIPLE CHOICE QUESTIONS
Hydrogen burns in oxygen to form
- hydrogen sulphide
- nitrates
- water
- ammonia
TRUE \ FALSE
Hydrogen does not combine with nitrogen under ordinary conditions.
For laboratory preparation of hydrogen, give the following:
materials used
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with:
A divalent metal
Starting from hydrogen gas how would you obtain a neutral liquid.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Iron - Fe + 2HCl → ______ + _______ [g]
Name an element whsich reacts violently with water at room temperature.
Give a balanced equation for obtaining hydrogen from?
Steam using a trivalent metal
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
