Which are mixture and pure substances from the followings?
(i) sea water
(ii)gasoline
(iii) skin
(iv) a rusty nail
(v) a page of the textbook.
(vi) diamond

Give chemical reactions when lanthanides reacts with (i) water(ii) oxygen (iii) Nitrogen (iv) halogens (v) carbon

Which one of the following will have the largest number of atoms? i. 1 g Au (s) (ii) 1 g Na (s) (iii) 1 g Li (s) (iv) 1 g Cl_2 (g)

Which of the following solids is not an electrical conductor? i) Mg(s) ii) TiO(S) iii) I_2(s) iv) H_2O(s) .

Classify the following as eleemnt and compound. (i) mercuric oxide (ii) helium gas (iii) water (iv) table salt (v) iodine (vi) mercury (vii) oxygen (viii) nitrogen

Identify the addition polymers from the following: i. Terylene ii. Polypropene iii. Polyacrylonitrile iv. Nylon-6 v. Polyvinyl chloride

Draw the structures of the following compounds the carbonyl C are same and classify them on the basis of C-O single bond and C = O double bond present in them: (i) Ethyl alcohol (ii) acetaldehyde (iii) o-nitrophenol (iv) Diethyl ether (v) isopropyl alcohol (vi) acetone.