Classify the following into pure substance and mixture. `Copper(s), HCI(aq), NaCl(s) and gold in mercury(i)

Classify each of the following as pure substances or mixture, (a) Ethyl alcohol,(b) Oxygen, ( c) Blood, (d) Carbon, (e) Steel, (f) Distilled water.

Classify the following into elements, compounds and mixtures (a) sodium (b) soil, (c ) sugar solution (d) silver (e ) calcium carbonate (f) soap (g) tin (h) silicon (i) coal

Classify the following substances into elements, compounds and mixtures: (i) Milk, (ii) 22-caret gold , (iii) Iodized table salt , (iv) Diamond, (v) Smoke, (vi) Steel, (vii) Brass, (viii) Dry ice (ix) Mercury, (x) Air, (xi) Aerated drinks, (xii) Glucose, (xiii) Petrol/Diesel/Kerosene oil, (xiv) Steam (xv) cloud.

Classify the following into homogenous and heterogenous mixtures: milk, 10 dread table salt, air, tap water, 22 carat gold, steel.

Classify the following into acidic ,basic or neutral. (i) NaCl (ii) Na_2SO_4 (iii) CaCl_2 (iv) K_2CO_3

Classify the following measures as scalars and vectors . (i) 10 kg (ii) 2 meters north (iii) 40^(@) (iv) 40 watt (v) 10^(19) coulomb (vi) 20m//s^(2)

Classify the following measures as scalars and vectors (i) 20 m north-west (ii) 10 newton (iii) 30 km/h (iv) 50m/s towards north (v) 10^(-19) coloumb

Express the following in S.I. units (a) 100 miles per hours, (b) 5 feet 2 inches

Which of the following pasirs give displacement reactions? (i) NaCl solution and copper metal (ii) MgCl_(2) solution and aluminium metal (iii) FeSO_(4) solution and silver metal (iv) AgNO_(3) solution and copper solution