25 mL of the given HCl solution requires 30 mL of 0.1M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30 mL of 0.2M aqueous NaOH solution?
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25 mL of the given HCl solution requires 30 mL of 0.1M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30 mL of 0.2M aqueous NaOH solution?
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The de Broglie wavelength $$(\lambda)$$ associated with a photoelectron varies with the frequency $$(\nu)$$ of the incident radiation as, [$$\nu_0$$ is threshold frequency]:
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The correct option with respect to the Pauling electronegativity values of the elements is:
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The reaction $$MgO(s) + C(s) \to Mg(s) + CO(g)$$, for which $$\Delta H° = +491.1$$ kJ mol$$^{-1}$$ and $$\Delta S° = 198.0$$ JK$$^{-1}$$ mol$$^{-1}$$ is not feasible at 298 K. Temperature above which reaction will be feasible is
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The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by $$\Delta G° = A - BT$$ where A and B are non-zero constants. Which of the following is true about this reaction?
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For the equilibrium $$2H_2O \rightleftharpoons H_3O^+ + OH^-$$; the value of $$\Delta G°$$ at 298 K is approximately:
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Match the following items in column I with the corresponding items in column II.
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The hydride that is NOT electron deficient is:
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The relative stability of +1 oxidation state of group 13 elements follows the order
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Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution?
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Which of the following compounds will produce a precipitate with $$AgNO_3$$?
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Taj Mahal is being slowly disfigured and discoloured. This is primarily due to
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The higher concentration of which gas in air can cause stiffness of flower buds?
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The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic unit cell is: (Edge length is represented by 'a')
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$$K_2HgI_4$$ is 40% ionised in aqueous solution. The value of its van't Hoff factor (i) is:
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Given the equilibrium constant: $$K_C$$ of the reaction: $$Cu(s) + 2Ag^+(aq) \to Cu^{2+}(aq) + 2Ag(s)$$ is $$10 \times 10^{15}$$. Calculate the $$E°_{cell}$$ of this reaction at 298 K. [$$2.303 \frac{RT}{F}$$ at 298 K = 0.059 V]
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The reaction $$2X \to B$$ is a zeroth order reaction. If the initial concentration of X is 0.2M, the half-life is 6 h. When the initial concentration of X is 0.5M, the time required to reach its final concentration of 0.2M will be
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Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is:
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The reaction that does NOT define calcination is:
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$$A \xrightarrow{4KOH, O_2} 2B_{(Green)} + 2H_2O$$; $$B \xrightarrow{4HCl} 2C_{(Purple)} + MnO_2 + 2H_2O$$; $$2C \xrightarrow{H_2O, KI} 2A + KOH + D$$. In the above sequence of reactions, A and D, respectively, are:
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The coordination number of Th in $$K_4[Th(C_2O_4)_4(H_2O)_2]$$ is: ($$C_2O_4^{2-}$$ = oxalato)
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The number of bridging CO ligand(s) and Co-Co bond(s) in $$Co_2(CO)_8$$, respectively are:
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The major product of the following reaction is:
The major product obtained in the following conversion is:
The major product obtained in the following reaction is:
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In the following compound, the favourable site/s for protonation is/are:
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A compound 'X' on treatment with Br$$_2$$/NaOH, provided $$C_3H_9N$$, which gives positive carbylamine test. Compound X' is:
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The homopolymer formed from 4-hydroxy-butanoic acids is:
The correct match between Item I and Item II is:
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The correct match between Item I and Item II is:
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