Mention against each of the following wheather regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case. Chalk powder .

Mention against each of the following wheather regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case. (e) Mirror .

Mention against each of the following wheather regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case. (f) Piece of paper .

Mention against each of the following wheather regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case. Cardboard surface .

Mention against each of the following wheather regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case. Marble floor with water spread over it .

Mention against each of the following wheather regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case. Polished wooden table .

Does the chemical reaction take place when zinc is added to ferrous sulphate solution? Justify your answer.

State whether each of the following statement is true or false. Justify your answer. { a, e, i, o, u } and { a, b, c, d } are disjoint sets.