| Column A | Column B | Column C |
| (i) Triad | (a) Positive change on the nuleus | (1) Mendeleev |
| (ii) Octave | (b) Sequential change in molecular formulae | (2) Dobereiner |
| (iii) Atomic number | (c) Average of the first and the third atomic mass | (3) Newlands |
| (iv) Period | (d) Properties of the eighth element similar to the first | (4) Mosely |
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| Column A | Column B | ||
| (1) | Porifera | (a) | Sea anemone |
| (2) | Coelenterata | (b) | Ascaris |
| (3) | Platyhelminthes | (c) | Sycon |
| (4) | Aschelminthes | (d) | Liverfluke |
| Column $A$ | Column $B$ | ||
| $(1)$ | Heating of Potassium Chlorate | $(a)$ | Turns lime water milky |
| $(2)$ | Depositing a layer of zinc on iron | $(b)$ | Chemical change |
| $(3)$ | Souring of milk | $(c)$ | Galvanisation |
| $(4)$ | Carbon dioxide | $(d)$ | $MnO_2$ is used as Catalyst |
| Reactants | Products | Types of Reaction | |||
| $(1)$ | $BaCl_2(aq) + ZnSO_4 (aq)$ | $(a)$ | $H_2CO_3(aq)$ | $(i)$ | Displacement |
| $(2)$ | $2 AgCl(s)$ | $(b)$ | $FeSO_4(aq) + Cu(s)$ | $(ii)$ | Combination |
| $(3)$ | $CuSO_4 (aq) + Fe(s)$ | $(c)$ | $BaSO_4↓+ ZnCl_2 (aq)$ | $(iii)$ | Decomposition |
| $(4)$ | $H_2O(l) + CO_2(g)$ | $(d)$ | $2Ag(s) + Cl_2(g)$ | $(iv)$ | Double displacement |
| Column A | Column B |
| (i) Sodium | (a) Non-metal |
| (ii) Sulphur | (b) Lanthanide |
| (iii) Manganese | (c) Metal |
| (iv) Cerium | (d) Transition metal |
| Column A | Column B | ||
| (1) | Pisces | (a) | Lungs |
| (2) | Amphibia | (b) | Gills |
| (3) | Aves | (c) | Skin |
| Reactants | Products | Types of Reaction | |||
| $(1)$ | $Fe + S$ | $(a)$ | $NaCl + H_2O$ | $(i)$ | Oxidation |
| $(2)$ | $CuSO_4 + Zn$ | $(b)$ | $2CuO$ | $(ii)$ | Neutralization |
| $(3)$ | $2Cu + O_2$ | $(c)$ | $ZnSO_4 + Cu$ | $(iii)$ | Displacement |
| $(4)$ | $HCl + NaOH$ | $(d)$ | $FeS$ | $(iv)$ | Combination |
| Column A | Column B | Column C | |||
| (1) | Farsightedness | (a) | Near object can be seen a clearly | (i) | Bifocal lens |
| (2) | Presbyopia | (b) | Far away object can be seen clearly | (ii) | Concave lens |
| (3) | Nearsightedness | (c) | Problem of old age | (iii) | Convex lens |
| Column 'A' | Column 'B' |
| (1) FSH | (a) Regeneration of endometrium |
| (2) Luteinizing hormone | (b) Secretion of endometrial glands |
| (3) Progesterone | (c) Development of follicle |
| (4) Estrogen | (d) Ovulation |
| Column A | Column B | ||
| (1) | Microscope | (a) | Torches and headlights |
| (2) | Telescope | (b) | Observation of plant and animal cells |
| (3) | Simple microscope | (c) | To observe distant objects |
| (4) | Concave mirror | (d) | Watch repairers |
| (e) | Correction of eye defect |