| Column A | Column B |
| 1. Strongest reductant metal | (a) $HgCl _2$ |
| 2. Metal which react with dilute acid | (b) Lithium (Li) |
| 3. Elements which shows only negative oxidation state | (c) Mg |
| 4. Mercury (II) chloride | (d) Fluorine |
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| Column A | Column B |
| (1) Enthalpy of solution | (a) irreversible process |
| (2) Volume | (b) decrease in entropy |
| (3) Spontaneous process | (c) hydration enthalpy/ salvation enthalpy |
| (4) Crystallisation of sugar from solution | (d) Extensive property |
| Column A | Column B |
| (1) $\Delta H _s$ | (a) R |
| (2) $C _{ p }- C _{ V }$ | (b) System + surroundings |
| (3) Law of conservation of energy | (c) $\Delta H _{ f }+\Delta H _V$ |
| (4) Universe | (d) First law of thermodynamics |
| Column A | Column B |
| (1) Nodal plane for $P _x$ orbital | (a) 6s, 5p, 4d |
| (2) 3 unpaired electrons in nitrogen | (b) yz |
| (3) Orbitals for n = 5, $l$=2 and m =0 | (c) Hund's law of maximum |
| (4) Orbitals for n+$l$ = 6 | (d) $5 dz ^2$ |
| Column A | Column B |
| (1) $H _2(g)+ I _2(g) \rightleftharpoons 2 HI ( g )$ | (a) $H _3 O ^{\oplus}$ |
| (2) $\begin{array}{l} PCl _5(g) \rightleftharpoons PCl _3(g)+ \\ Cl _2(g)\end{array}$ | (b) $K _{ p }= K _{ c }$ |
| (3) $CaCO _3(s) \rightleftharpoons CaO ( s )+$ $CO _2(g)$ | (c) Unit of $K _{ c }=$ $\left(\right.$ concentration) ${ }^1$ |
| (4) Conjugate acid of $H _2 O$ | (d) Heterogeneous equilibrium |
| Prefixes | Multiples |
| (i) micro | $10^6$ |
| (ii) deca | $10^9$ |
| (iii) mega | $10^{-6}$ |
| (iv) giga | $10^{-15}$ |
| $10$ |
| Column A | Column B |
| (1) $\left[ H ^{+}\right]=\left[ OH ^{-}\right]$ | (a) Neutral solution |
| (2) POH > PH | (b) N=2x M |
| (3) 1 M HCI solution | (c) Acidic solution |
| (4) For $H _2 SO _4$ | (d) pH = 0 |
| Column A | Column B |
| (1) Basicity of boric acid | (a) $\Delta H$ is positive |
| (2) Proton acceptor | (b) pH < 7 |
| (3) Endothermic reaction | (c) Bronsted-Lowry base |
| (4) Aqueous solution of NH4 CI | (d) 1 |
| Column A | Column B |
| (1) $s p^2$ hybridisation | (a) $BeCl _2$ |
| (2) $s p^3$ hybridisation | (b) $\stackrel{\oplus}{ C } H _3$ |
| (3) $Rb _2 O$ | (c) $\stackrel{+}{ N } H _4$ |
| (4) 50/s-character compound | (d) Oxide having more basic property |
| Column A | Column B |
| (1) Planck's quantum theory | (a) dipositive charge |
| (2) Value of $l$ for 3d | (b) E = hv |
| (3) Numbers of unpaired electron in $Fe ^{+2}$ | (c) 2 |
| (4) Charge on a particle | (d) 4 |
| Column A | Column B |
| 1. Estimation of carbon and hydrogen | (a) Estimation of halogen |
| 2. Carius process | (b) Lateral overlapping |
| 3. $\pi$ Bond | (c) Methyl free radical |
| 4. Homolytic cleavage of $C - C$ bond of ethane | (d) Liebig combustion process |