English Medium इयत्ता १० - CBSE Question Bank Solutions

Complete and balance the following equation:

CA (OH)₂  +  .............          CaCO₃    +   H₂O

A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.

Write the food chain comprising all the organisms mentioned above.

A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.

Which other organism you could write in place of bird in the above food chain?

Correct and balance the following equation:
Ca   +   H₂O     CaOH   +   H

Correct and balance the following equation:

N    +   H     NH₃

Write complete balanced equation for the following reaction:

Calcium (solid) + water (liquid)  Calcium Hydroxide (solution) + Hydrogen (gas)

Write complete balanced equation for the following reaction:

Sulphur dioxide (gas) + Oxgyen (gas)   Sulphur trioxide (gas)

Balance the following equation:

Na + O₂  Na₂O

Balance the given equation:

H₂O₂  H₂O + O₂

Balance the given equation:

Mg(OH)₂  + HCI    MgCI + H₂O

Balance the given equation:

Fe + O₂  Fe₂O₃

Balance the given equation:

AI(OH)₃   AI₂O₃ +H₂O

Balance the given equation:

NH₃ + CuO  Cu +N₂ +H₂O

Balance the given equation:

AI₂(SO₄)₃ +NaOH  AI(OH)₃ + Na₂SO₄ 

Balance the given equation:

HNO₃ + Ca(OH)₂  Ca(NO₃)₂ + H₂O

Balance the gievn equation:

NaOH + H₂SO₄  Na₂SO₄ + H₂O

Balance the given equation:

BaCI₂ + H₂SO₄  BaSO₄ + HCI

Fill in the following blank with suitable word:

 Chemical equations are balanced to satisfy the law of ............

Fill in the following blank with suitable word:

A solution made in water is known as an ........... solution and indicated by the symbol ...........

What is a chemical equation? Explain with the help of an example.