Give scientififc reasons
When the gas formed on heating limestone is passsed through freshly prepared lime water,the lime water turns milky.

Choose the correct alternative and write it along with its allotted alphabet: When ....... is passed through fresh lime water, it turns milky.

Give scientific reasons: Soap forms a precipitate in hard water.

When carbon dioxide is passed through lime water it turns milky.Why?

Give scientific reasons: Even though a heat is supplied to boiling water, there is no increase in its temperature.

Describe the following chemical reactions giving their balanced equation: Chlorine gas is passed through slaked lime.

Apparatus: Two test tubes, bent tube, rubber cork, burner, etc. Chemicals: Calcium carbonate, freshly prepared lime water. Procedure: Take some calcium carbonate in a test tube. Fit a bent tube to this test tube with the help of a rubber cork. Insert the other end of the bent tube in the freshly prepared lime water taken in the other test tube. Heat the powdered calcium carbonate in the first test tube strongly. What will you observe?

Give scientific reasons The shadow of the edge of an empty vessel is formed due to the slanting rays of the sun . When water is poured in the vessel , the shadow is shifted.

When water is added to quick lime, the reaction is