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प्रश्न
Distinguish by heating the following in dry test tubs.
Zinc nitrate and copper nitrate.
उत्तर
| Zinc nitrate | Copper nitrate | |
| Residue left | Zinc oxide(ZnO) | Copper oxide(CuO) |
| Colour of residue | Yellow when hot and White when cold | Black Solid |
| Gas produced | The gas produced is Nitrogen dioxide and oxygen(NO2 + O2) | The gas produced is Nitrogen dioxide and oxygen(NO2 + O2) |
APPEARS IN
संबंधित प्रश्न
Define electrolysis.
State four conditions necessary for chemical reactions to take place.
Write true or false :
Hydrogen sulphide has rotten egg smell .
| Reactants | Products | Type of chemical reaction |
| BaCl2(aq) + ZnSO4(aq) | H2CO3(aq) | Displacement |
| 2AgCl(s) | FeSO4(aq) + Cu(s) | Combination |
| CuSO4(aq) + Fe(s) | BaSO4↓ + ZnCl2(aq) | Decomposition |
| H2O(l) + CO2(g) | 2Ag(s) + Cl2(g) | Double displacement |
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 spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
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)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
Give an example of a reaction where the following are involved:
Solution
Give an example of a reaction where the following are involved
Pressure
Give an example of the following chemical change.
Two solids combine to form a liquid
What do you observe? When
Water is added to the quick lime.
Complete and balance the following reaction:
NaCl(aq) + AgNO3(aq) →
Name: A greenish-yellow gas.
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
______ is not a chemical change.
The changes in which new substance with new chemical properties are formed are ______.
Which of the following is a chemical change?
