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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 coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.
उत्तर
Copper sulphate [CuSO].
APPEARS IN
संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
FILL IN THE BLANK
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Fill in the blank:
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Name: Two carbonates do not produce carbon dioxide on heating.
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 |
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
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With reference to each of the above indications, state the external indication seen during – Addition of dilute acid to an active metal.
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- Colour change
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- Evolution or absorption of heat
- Formation of a precipitate.
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\[\ce{Al->Al+++}\]
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______ change results in the change of the substance.
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- It changes colour.
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Choose the correct option from below:
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Acid rain is a result of ______.
