Question

please answer and I will mark you as the brainliest ​

Answer 1

Answer:

Explanation:

Ans of q3)1)H2O2 is preferred for lab preparation of oxygen because of following reasons. No heating is required. The rate of evolution of oxygen (O2) is moderate and under control. H2O2 is a safe chemical.

2)It helps each living creature to respire

3)dephlogisticated air

Answer 2

Answer:

4. A

5. A

Q4 ..

1. the worship of trees in Hinduism is done for diffrent purposes, according to hindu mythology. It can be for moksha,fertility or for fulfilling wishes.

2. Food gets spoiled at room temperature because of bacterial growth. Hence refrigerator is best place to store food.

3. An inhaled form of oxygen and carbon dioxide that has more oxygen than air has. It is being studied in the treatment of cancer .