Question

1. Suggest any two remedies to protect and conserve the endangered species of birds animals like maldhok,black rhinos, etc
2. In the molecular formula ofAICI3 what is the valency of aluminium and chlorine
3. The reaction between calcium oxide and water
________ +H2o -________ + energy

Answer 1

CaO+H2O=CaO(OH)2+ energy

Answer 2

1. Most of the animal and bird species are becoming endangered primarily due to loss of natural habitat. Thus, the most important way to protect the endangered species of birds and animals is to protect the natural habitat and land in which they live. These areas include bird sanctuaries, national wildlife parks, zoos, aquariums, botanical gardens, etc. Also, using recyclable products instead of polluting the environment. Avoid using products made through illegal wildlife that include tortoise-shell, ivory, coral and products like fur from tigers, polar bears, sea otters and other endangered wildlife, crocodile skin etc.

2. The valency of Aluminum in Aluminum Chloride is +3 and the valency of Chlorine in AlCl₃ is -1. Valency is defined for an element.

3. Calcium oxide is also called as lime. The balanced reaction between Calcium oxide and water can be written as - 
CaO (s) + H₂O (l) → Ca(OH)₂ (s) + Energy.