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प्रश्न
Fill in the blank:
The substances which undergo chemical change are called _______
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उत्तर
The substances which undergo chemical change are called reactants .
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संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
How do the following help in bringing about a chemical change?
light.
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
Define electrolysis.
Explain the following reaction with one suitable example of Displacement reaction.
Give an example of a reaction where the following are involved
Electricity
Give an example of a reaction where the following are involved:
Close contact
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
A reaction between an acid and a base is called ______.
The percentage composition of Nitrogen in Ureas is ______.
A chemical change may involve –
Give two examples for the following case:
Chemical changes
Photosynthesis is a chemical charge. Justify your answer.
______ is the chemical name of rust.
What is the difference between reactants and products?
