Compounds and mixtures

Classify the following substances into element, compound and mixture. (i) Smoke (ii) Mercury.

Classify the following substances into element, compound and mixture. (i) Brass (ii) Distilled water

Classify the following substances into element, compound and mixture. (i) Dry ice. (ii) Sodium chloride.

Differentiate between a compound and a mixture.

Define the terms elements, compounds & mixtures with a view to show their basic difference.

Mention whetherthefollowing are elements, compounds or mixtures : (i) glass, (ii) german silver (iii) llimestone, (iv) pure gold (v) diamond, (vi) glucose (vii) salt solution, (viii) helium (ix) oxygen, (x) water

Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.

Which of the following statements are true for pure substances? (i) Pure substances contain only one kind of particles. (ii) Pure substances may be compounds or mixtures. (iii) Pure substances have the same composition throughout. (iv) Pure substance can be exemplified by all elements other than nickel.

Tri chloro acetaldehyde was subjected to Cannizzaro's reaction by using NaOH . in product, one of the compound in mixture of the two is 2,2,2-tri chloro sodium acetate. The other compound is

In the nitration of an aromatic compound using a mixture of concentrated nitric acid and sulphuric acid, the acids respectively function as