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) |
✓
Answer
(1) (d), (2) (c), (3) (b), (4) (a).
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| Column A | Column B |
| (1) Energy mass equation of Einstein | (a) $KE =\frac{1}{2} m v^2$ |
| (2) Wavelength of Balmer series | (b) Linear spectrum |
| (3) Atomic spectrum | (c) $4000 Å-7000 Å$ |
| (4) Kinetic energy | (d) $E = mc ^2$ |
| 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) $K _{ a _2}< K _{ a _1}$ |
Match column A and B and choose correct code :
→| Column A | Column B |
| 1. Bayer's reagent | (a) $C _{12}$ to $C _{16}$ |
| 2. Ozonolysis of but-2-ene | (b) $CH _3- CH _2- CHO$ |
| 3. Hydroformylation of ethene | (c) Test for unsaturation |
| 4. Kerosene oil | (d) $CH _3 CHO$ |
| Column A | Column B |
| (1) $s p^3$ hybridisation | (a) $CO _2$ |
| (2) Linear geometry | (b) $H _2 O$ |
| (3) Bond angle $104.5^{\circ}$ | (c) $CCl _4$ |
| (4) One l.p at central atom | (d) $NH _3$ |
| Column A | Column B |
| (1) Significant figures in 0.0026 | (a) $40 \times 10^2 pm$ |
| (2) 8 gm NaOH per liter | (b) 2 |
| (3) 40 Å | (c) 0.2 M |
| (4) Number of electrons in ethane | (d) 18 |
Match the column A with column B and select the correct code.
→| Column A | Column B |
| 1. Hyperconjugation | (a) Elimination reaction |
| 2. $CH _4 \rightarrow CH _3 Cl$ | (b) $\sigma$ bond resonance |
3.  | (c) Electrophilic addition reaction |
| 4. $CH _2= CH _2+ HBr$ | (d) Substitution reaction |
| Column A | Column B |
| (1) Amphoprotic solvent | (a) $CO _3^{2-}$ |
| (2) Conjugate base of $HCO _3^{-}$ | (b) $BF _3$ |
| (3) $CH _3 COOH$ | (c) $NH _3$ |
| (4) Lewis acid | (d) A weak base |
| Column A | Column B |
| (1) Li, Na, K | (a) 7 |
| (2) Number of periods in periodic table | (b) Elements of group 18 |
| (3) Noble gases | (c) ununseptium |
| (4) Atomic mass 117 | (d) Dobereiner's triad |
| Column A | Column B |
| (1) Bond angle 120° | (a) $s p^3-s p^3$ overlapping |
| (2) $H _2^{-}< H _2{ }^{+}< H _2$ | (b) $\left[ Ni ( CN )_4\right]^{2-}$ |
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| (4) C-C bond in ethane | (d) Increasing order of stability |
| Column A | Column B |
| (1) Molar mass of NaCl | (b) mass-volume unit |
| (2) Number of moles of water in 36 gm | (b) mass-volume unit |
| (3) Empirical formula of Benzene | (c) $58.5 gm mol ^{-1}$ |
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