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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 solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.
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उत्तर
Ammonium chloride [NH4Cl].
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संबंधित प्रश्न
How do the following help in bringing about a chemical change?
catalyst .
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
Write true or false .
A black residue is formed when sugar is heated .
Name the gases which turn moist red litmus blue.
What do you observe when H2S is passed through a lead nitrate solution.
What do you observe when Cobalt chloride paper is introduced in water vapour.
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
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.
______ is not a chemical change.
