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प्रश्न
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
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उत्तर
Solid residual product of thermal decomposition of:
| Zinc carbonate | \[\ce{\underset{\text{Zinc oxide}}{ZnO}}\] | White |
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संबंधित प्रश्न
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Write the chemical reaction where the following changes are observed.
Colour change is noticed
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
Photosynthesis is a chemical reaction that takes place in the presence of ______.
_____ is the basic material to manufacture urea.
Two chemical species X and Y combine together to form a product P which contains both X and Y
\[\ce{X + Y -> P}\]
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
