Describe how the following changes are brought about ?
(i) Impure Ti to Pure Ti
(ii) ZnO to metallic Zn
(iii) Pig iron into steel

Describe how the change are brought about? Pig into steel

Describe how the change are brought about impure titanium into pure titanium?

Describe how the change are brought about? Alumina into aluminium

Describe how the change are brought about? Zinc oxide into matallic zinc

Give uses of the following metals : (i) Aluminium (ii) Copper (iii) Zinc (iv) Iron

Which of the following are reasons for Mendel's success ? (i) Usage of pure lines or pure breeding varieties (ii) Consideration of one character at a time (iii) Maintenance of statistical records of experiments (iv) Knowledge of linkage and incomplete dominance

How will you obtain the following compounds from ethyl bromide? (i) Ethane (ii) Ethylmethyl ether (iii) Ethyl amine

Which of the following is correct about bivalent? (i) Bivalents are tetrads. (ii) A bivalent means 4 chromatids and 2 centromeres. (iii) One bivalent consists of 2 homologous chromosomes. (iv) Bivalents form in zygotene.