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प्रश्न
When crystals of copper sulphate are strongly heated, the residue obtained is ___________.
(A) red in colour
(B) blue in colour
(C) green in colour
(D) colourless
उत्तर
colourless
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संबंधित प्रश्न
Find the odd man out:
Camphor, Ammonium Chloride, Naphthalene balls, Sugar
A silvery-white metal X taken in the form of ribbon, when ignited, burns in air with a dazzling white flame to form a white powder Y. When water is added to powder Y, it dissolves partially to form another substance Z.
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(b) What is powder Y?
(c) With which substance metal X combines to form powder Y?
(d) What is substance Z? Name one domestic use of substance Z.
(e) Write a balanced chemical equation of the reaction which takes place when metal X burns in air to form powder Y.
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(d) What is material D? Where is it found?
(e) Name the organic compound E.
(f) What is gas F? Name the natural process during which it is released.
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2 Ca + O2 → 2CaO
What type of chemical reaction is represented by the following equation?
A + B → C
What type of reaction is represented by the following equation?
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(b) in the second case
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The number of products formed in a synthesis reaction is ______
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(ii) Dilution of an acid
(iii) Evaporation of water
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A small amount of hydrochloric acid was taken in a test tube. The test tube was heated. A glass rod was dipped in the ammonia solution and held on the top of the test tube. A white smoke was seen emanating from the tip of the glass rod.
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- Which colour of gas is formed?
- Write the chemical equation for the reaction.
