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Answer
(1 - c), (2 - d), (3 - a),(4 - b)
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| Column $A$ | Column $B$ | ||
| $(1)$ | Persistence of Vision | $(a)$ | $2.4 \ cm$ |
| $(2)$ | Distance of distinct vision | $(b)$ | $\frac{1}{16}^{th}$ of a second |
| $(3)$ | Diameter of eye ball | $(c)$ | $2 \ cm$ is a lens |
| $(4)$ | Focal length of healthy eye lens | $(d)$ | $25 \ cm$ |
Match the columns.
→| Reactants | Products | Types of chemical reaction | ||
| $1.$ | $MgH_2$ | $\rightarrow$ | $Mg + H_2$ | Endothermic |
| $2.$ | $2H_2S + SO_2$ | $\rightarrow$ | $3S + 2H_2O$ | Oxidation |
| $3.$ | $CaO + H_2O$ | $\rightarrow$ | $Ca(OH)_2 +$ heat | Exothermic |
| Redox | ||||
| Column A | Column B |
| (1) Solid fuel | (a) Vegetable oils |
| (2) Liquid fuel | (b) Gobar gas |
| (3) Gaseous fuel | (c) Crop residue |
| 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 |
| Column A | Column B | ||
| (1) | Hemichordata | (a) | Amphioxus |
| (2) | Cephalochordata | (b) | Saccoglossus |
| (3) | Urochordata | (c) | Petromyzon |
| (4) | Cyclostomata | (d) | Herdmania |
| Column A | Column B |
| (1) Aerobic respiration | (a) Nuclear division |
| (2) Anaerobic respiration | (b) Oxygen is involved |
| (3) Karyokinesis | (c) Cytoplasmic division |
| (4) Cytokinesis | (d) Oxygen is not involved |
| Column $A$ Name of the Compound | Column $B$ Structural Formula | ||
| $(1)$ | Ethyl alcohol | $(a)$ | $CH_3-CH_2-CH_2-CH_3$ |
| $(2)$ | Acetone | $(b)$ | $CH_3-CH_2-CH_2-OH$ |
| $(3)$ | Propionic acid | $(c)$ |  |
| $(4)$ | Ethyne | $(d)$ |  |
| $(5)$ | Propanol | $(e)$ | $CH_3-CH_2OH$ |
| $(6)$ | Butane | $(f)$ | $HC=CH$ |
| Column A | Column B |
| (i) Sodium | (a) Non-metal |
| (ii) Sulphur | (b) Lanthanide |
| (iii) Manganese | (c) Metal |
| (iv) Cerium | (d) Transition metal |
| 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 |