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प्रश्न
What is a chemical reaction?
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उत्तर
A chemical reaction is the process of breaking the chemical bonds of the reacting substances (reactants) and making new bonds to form new substances (products).
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संबंधित प्रश्न
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer
Which of the following is a reducing agent?
- oxygen
- chlorine
- hydrogen
- none of these
Write the chemical reaction where the following changes are observed.
Precipitate is formed
Give a chemical test to distinguish between the following gases.
NH3 and HCl
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Write a word equation for the chemical change, if any.
Acid rain is a result of ______.
