Give reasons :
(i) Personal and public hygiene are important aspects for mainaining health.
(ii) The use of cannabinoids prohibited in games and sports.

Give one important use of (i) Bithional (ii) Paracetamol

Explain giving reason: (i) Treansition metals and their compounds generally exhibit a paramagnetic behave . (ii) The chemistry of actinoids is not so smooth as that of lanthanoids.

Maintenance of personal and public hygiene is necessary for prevention and control of many infectious diseaes. Justify the staement giving suitable examples.

"Maintenance of personal and public hygiene is necessary for prevention and control of many infectious disease." Justify the statement giving suitable examples.

Give reason: (i) Transition metals show variable oxidation states. (ii) Actinoids show wide range of oxidation states.

Give reasons for : (i) People climbing to high altitudes may suffer from dizziness and unsteady vision. (ii) Lime water is used in most experiments on respiration. (iii) Respiration rate is higher in animals than in plants.

Which of the following sentences are statements? Give reasons for your answer.(i) There are 35 days in a month.(ii) Mathematics is difficult.(iii) The sum of 5 and 7 is greater than 10.(iv) The square of a number is an even number.

For each of the following statements, determine whether an inclusive Or or exclusive Or is used. Give reasons for your answer.(i) To enter a country, you need a passport or a voter registration card.(ii) The school is closed if it is a holiday or a Sunday.(iii) Two lines intersect at a point or are parallel.(iv) Students can take French or Sanskrit as their third language.

Give two uses of (i) Methane (ii) Ethane.

Give two uses of (i) caustic soda (ii) quick lime