Advertisements
Advertisements
प्रश्न
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
उत्तर
Action of heat on:
\[\ce{\underset{\text{White}}{ZnCO3}->[\triangle] \underset{\text{[Zinc oxide] yellow - hot white - cold}}{ZnO} + CO2}\]
APPEARS IN
संबंधित प्रश्न
FILL IN THE BLANK
Positively charged ions are called ........
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
Explain the type of reactions on the basis of the direction of reaction.
Balancing a chemical equation is based on
Copper carbonate when heated, it turns :
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)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Give an example of a reaction where the following are involved
Heat
Give an example of the following chemical change.
Two solids combine to form a liquid
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Give a chemical test to distinguish between the following gases.
NH3 and SO2
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
Mention the various conditions required for a chemical reaction to occur.
Write some materials prepared by chemical changes.
Heat may evolve or be absorbed during a ______ change.
Galvanization is a process in which ______ is coated as a layer of iron.
Photosynthesis is a chemical charge. Justify your answer.