Q4 of 40 Page 2

How do we test purity of substance?

A pure substance is made of constituent particles that are same in their chemical structure. They have a fixed melting and boiling point and as such the purity can be tested by comparing the melting point of the impure substance with a pure standard.

More from this chapter

All 40 →
2

Write one property of colloids.

 3

Which one amongst the following will show Tyndall effect?

(i) Common salt solution


(ii) Copper sulphate solution


(iii) Milk

 5

When blue ink is heated, what do you think has got evaporated from the watch glass?

 6

Which method is mostly used for purification of solids?