Question
| Column A | Column B |
| (1) Elements in metals. having highest melting point | (a) Hoffnium (Hf) |
| (2) II electron gain enthalpy of oxygen | (b) III > II > 1 |
| (3) Sequence of ionization enthalpy | (c) Positive |
| (4) II member of 5d series | (d) Tungsten (W) |
| Column A | Column B |
| (1) Elements in metals. having highest melting point | (a) Hoffnium (Hf) |
| (2) II electron gain enthalpy of oxygen | (b) III > II > 1 |
| (3) Sequence of ionization enthalpy | (c) Positive |
| (4) II member of 5d series | (d) Tungsten (W) |
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| 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) Standard state of substance | (a) $\Delta G =\Delta H - T \Delta S$ |
| (2) Entropy of sublimation | (b) 1 atm pressure and 298 K temperature |
| (3) Gibbs equation | (c) non-crystalline |
| (4) Glass | (d) $\Delta S _{\text {sub }}=\frac{\Delta H _{\text {(sub) }}}{ T }$ |
| Column A | Column B |
| (1) $Ba ( OH )_2$ | (a) $\alpha \propto \sqrt{V}$ |
| (2) For weak acid | (b) Acidity = 2 |
| (3) Ostwald dilution law | (c) $\left[ H ^{+}\right]=\sqrt{ C . K _{ a }}$ |
| (4) For dibasic acid | (d) $K _{ a _2}< K _{ a _1}$ |
| Column A | Column B |
| (1) High boiling point of $H _2 O$ | (a) Paramagnetic |
| (2) $B _2$ molecule | (b) Decreasing order of bond order |
| (3) HCI < HBr < HI < HF | (c) Intramolecular H -bond |
| (4) $H _2 O > H _2 S> H _2 Se >$ $H _2 Te$ | (d) Increasing order of boiling point |
| Prefixes | Multiples |
| (i) micro | $10^6$ |
| (ii) deca | $10^9$ |
| (iii) mega | $10^{-6}$ |
| (iv) giga | $10^{-15}$ |
| $10$ |
| Column A | Column B |
| 1. On Ag electrode, the electrolysis of aqueous solution of $AgNO _3$ | (a) $K _2 Cr _2 O _7$ |
| 2. $Cr < Mg < K$ | (b) $CHCl _3$ |
| 3. Different mathmetical value of valency and oxidation number of carbon | (c) Reducing capacity |
| 4. Oxidizing property | (d) On cathode Ag and on anode $Ag ^{+}$ |
| Column A | Column B |
| (1) Deci | (a) atomic mass |
| (2) Equivalent weight of atom Valency | (b) weight-weight unit |
| (3) $6.022 \times 10^{22}$ carbon atom | (c) 1/10 |
| (4) Molality | (d) 1.2 gm carbon |
| Column A | Column B |
| (1) Positive rays or canal rays | (a) n = A-Z |
| (2) Discovery of neutron | (b) isotones |
| (3) ${ }_{14}^{30} Si$ and ${ }_{15}^{31} P$ | (c) Chadwick |
| (4) Number of neutrons | (d) Proton |
| Column A | Column B |
| (1) p-p axial overlapping | (a) Diamond |
| (2) One $\sigma$ and $1 \pi$ bond | (b) CI-CI |
| (3) Ethyne | (c) $O _2$ |
| (4) High melting point | (d) sp hybridisation |
| Column A | Column B |
| (1) Neutralization energy of HCl + NaOH | (a) Heat exchange due to difference in temperature |
| (2) Formation of mixture of gases | (b) 57.32 kJ |
| (3)$\Delta G$ > 0 | (c) increase in entropy |
| (4) Heat | (d) non-spontaneous process |