The average molar mass of chlorine is $$35.5\,\text{g mol}^{-1}$$. The ratio of $$^{35}\text{Cl}$$ to $$^{37}\text{Cl}$$ in naturally occurring chlorine is close to:
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The average molar mass of chlorine is $$35.5\,\text{g mol}^{-1}$$. The ratio of $$^{35}\text{Cl}$$ to $$^{37}\text{Cl}$$ in naturally occurring chlorine is close to:
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For a reaction $$4M(s) + nO_2(g) \to 2M_2O_n(s)$$. The free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which:
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The value of $$K_c$$ is 64 at 800 K for the reaction
$$\text{N}_2(g) + 3\text{H}_2(g) \to 2\text{NH}_3(g)$$
The value of $$K_c$$ for the following reaction is:
$$\text{NH}_3(g) \to \frac{1}{2}\text{N}_2(g) + \frac{3}{2}\text{H}_2(g)$$
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Dihydrogen of high purity (> 99.95%) is obtained through:
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Match the following compounds (Column-I) with their uses (Column-II):
S. No. Column-I S.No. Column-II
(I) $$\text{Ca(OH)}_2$$ - (A) casts of statues
(II) NaCl - (B) white wash
(III) $$\text{CaSO}_4 \cdot \frac{1}{2}\text{H}_2\text{O}$$ - (C) antacid
(IV) $$\text{CaCO}_3$$ - (D) washing soda preparation
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Match the following:
Test/Method Reagent
(i) Lucas Test (a) $$\text{C}_6\text{H}_5\text{SO}_2\text{Cl}$$ / aq. KOH
(ii) Dumas method (b) $$\text{HNO}_3$$ / $$\text{AgNO}_3$$
(iii) Kjeldahl's method (c) CuO / $$\text{CO}_3$$
(iv) Hinsberg Test (d) Conc. HCl and $$\text{ZnCl}_2$$
(e) $$\text{H}_2\text{SO}_4$$
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The IUPAC name of the following compound is:
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A crystal is made up of metal ions 'M1' and 'M2' and oxide ions. Oxide ions form a ccp lattice structure. The cation 'M1' occupies 50% of octahedral voids and the cation 'M2' occupies 12.5% of tetrahedral voids of oxide lattice. The oxidation numbers of 'M1' and 'M2' are respectively:
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A set of solutions is prepared using 180 g of water as a solvent and 10 g of different non-volatile solutes A, B and C. The relative lowering of vapour pressure in the presence of these solutes are in the order [Given, molar mass of $$A = 100\,\text{g mol}^{-1}$$; $$B = 200\,\text{g mol}^{-1}$$; $$C = 10,000\,\text{g mol}^{-1}$$]
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For the given cell; $$\text{Cu}(s)|\text{Cu}^{2+}(C_1\,M)||\text{Cu}^{2+}(C_2\,M)|\text{Cu}(s)$$
change in Gibbs energy $$(\Delta G)$$ is negative, it:
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The element that can be refined by distillation is:
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The reaction of NO with $$\text{N}_2\text{O}_4$$ at 250 K gives:
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Reaction of an inorganic sulphite X with dilute $$\text{H}_2\text{SO}_4$$ generated compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z. Y and X, respectively, are:
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Mischmetal is an alloy consisting mainly of:
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For a $$d^4$$ metal ion in an octahedral field, the correct electronic configuration is:
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The increasing order of the boiling points of the major products A, B and C of the following reactions will be:
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The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is:
Item-I Item-II
(I) Benzene (P) HCl and $$\text{SnCl}_2$$, $$\text{H}_3\text{O}^+$$
(II) Benzonitrile (Q) $$\text{H}_2$$, $$\text{Pd-BaSO}_4$$, S and quinoline
(III) Benzoyl Chloride (R) Co, HCl and $$\text{AlCl}_3$$
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Which of the following compounds can be prepared in good yield by Gabriel phthalimide synthesis?
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The correct match between item-I and item-II is:
Item-I Item-II
(a) Natural rubber (I) 1,3-butadiene + styrene
(b) Neoprene (II) 1,3-butadiene
(c) Buna-N (III) chloroprene
(d) Buna-S (IV) Isoprene
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Which one of the following statement is not true?
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The atomic number of Unnilunium is______.
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If the solubility product of $$\text{AB}_2$$ is $$3.20 \times 10^{-11}\,\text{M}^3$$, then the solubility of $$\text{AB}_2$$ in pure water is ______ $$\times 10^{-4}\,\text{mol L}^{-1}$$ [Assuming that neither kind of ion reacts with water]
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The rate of a reaction decreased by 3.555 times when the temperature was changed from $$40\,^\circ\text{C}$$ to $$30\,^\circ\text{C}$$. The activation energy (in $$\text{kJ mol}^{-1}$$) of the reaction is______.
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For Freundlich adsorption isotherm, a plot of $$\log(x/m)$$ (y-axis) and $$\log p$$ (x-axis) gives a straight line, the intercept and slope for the line is 0.4771 and 2, respectively. The mass of gas, adsorbed per gram of adsorbent if the initial pressure is 0.04 atm is ______ $$\times 10^{-4}\,\text{g}$$.
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A solution of phenol in chloroform when treated with aqueous NaOH gives compound P as a major product. The mass percentage of carbon in P is______.
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