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प्रश्न
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
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उत्तर
\[\ce{2KClO3 ->[heat] 2KCl + 3O2}\]
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संबंधित प्रश्न
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
Give a reason.
Wasp sting is treated with vinegar.
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Sodium chloride
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
What do you understand by precipitation reaction? Explain with examples.
What is a chemical change? Give two examples of chemical change?
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
A chemical reaction is often accompanied by external indications or characteristics.
Explain the following statement: Digestion is a chemical change.
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?
A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Write word equations for two chemical reactions with the help of materials given in the box.
| Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water |
Write the characteristics of chemical change.
When carbon dioxide is passed through lime water ______.
