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प्रश्न
Silver metal can displace hydrogen gas from nitric acid.
विकल्प
True
False
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उत्तर
False
Correct statement: In the activity series, any metals that are below hydrogen will not react with HNO3.
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संबंधित प्रश्न
Define catalyst.
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On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.
FILL IN THE BLANK
Negatively charged ions are called ..........
Explain the type of reactions on the basis of the direction of reaction.
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Give reason for the following:
Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
Write five changes in the characteristics of a substance that can take place during a chemical change.
