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प्रश्न
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
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उत्तर
| Copper sulphate | Copper carbonate | |
| Residue left | Anhydrous(CuSO4) | Copper oxide(CuO) |
| Colour of residue | The colour of the residue is Dirty white. | The colour is black solid. |
| Gas produced | Water vapour (H2O) is produced. | Carbon dioxide(Co2) is produced. |
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संबंधित प्रश्न
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
FILL IN THE BLANK
In a ............ change, new substances are formed.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
The white particles of baking soda disappear when put in lemon juice. This means that it is a ______ change.
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Complete and balance the following reaction:
NaCl(aq) + AgNO3(aq) →
Give a word equation for the following reaction.
Two gases which combine to give a solid.
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
A reaction between an acid and a base is called ______.
When an aqueous solution of potassium chloride is added to an aqueous solution of silver nitrate, a white precipitate is formed. Give the chemical equation of this reaction.
