What quantity (in mL) of a 45% acid solution of a mono-protic strong acid must be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid solution?
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What quantity (in mL) of a 45% acid solution of a mono-protic strong acid must be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid solution?
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The electron in the hydrogen atom undergoes transition from higher orbitals to orbital of radius 211.6 pm. This transition is associated with
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The electronic configuration with the highest ionization enthalpy is:
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The group having triangular planar structure is:
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The increasing order of the boiling points for the following compounds is:
(I) C$$_2$$H$$_5$$OH (II) C$$_2$$H$$_5$$Cl (III) C$$_2$$H$$_5$$CH$$_3$$ (IV) C$$_2$$H$$_5$$OCH$$_3$$
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Among the following compounds, the compound which shows the highest dipole-moment is
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At 300 K, the density of a certain gaseous molecule at 2 bar is double to that of dinitrogen (N$$_2$$) at 4 bar. The molar mass of the gaseous molecule is
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An ideal gas undergoes isothermal expansion at constant pressure. During the process:
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A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is 5 J and 8 J, respectively. Now gas is brought back to A by another process during which 3 J of heat is evolved. In this reverse process of B to A.
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The following reaction occurs in the Blast Furnace where iron ore is reduced to iron metal:
Fe$$_2$$O$$_3$$(s) + 3CO(g) $$\rightleftharpoons$$ 2Fe(l) + 3CO$$_2$$(g)
Using the Le Chatelier's principle, predict which one of the following will not disturb the equilibrium?
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50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pK$$_b$$ of ammonia solution is 4.75, the pH of the mixture will be:
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Which one of the following is an oxide?
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Which of the following compounds is most reactive to an aqueous solution of sodium carbonate?
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In the following structure, the double bonds are marked as I, II, III and IV.
Geometrical isomerism is not possible at the site(s):
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The major product of the following reaction is:
Methylcyclohexane reacts with Br$$_2$$/h$$\nu$$
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Which of the following is a set of greenhouse gases?
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A solution is prepared by mixing 8.5 g of CH$$_2$$Cl$$_2$$ and 11.95 g of CHCl$$_3$$. If vapour pressure of CH$$_2$$Cl$$_2$$ and CHCl$$_3$$ at 298K are 415 and 200 mm Hg respectively, the mole fraction of CHCl$$_3$$ in vapour form is: (Molar mass of Cl = 35.5 g mol$$^{-1}$$)
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Which of the following ions does not liberate hydrogen gas on reaction with dilute acids?
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To find the standard potential of M$$^{3+}$$/M electrode, the following cell is constituted:
Pt | M/M$$^{3+}$$ (0.001 mol L$$^{-1}$$) / Ag$$^+$$ (0.01 mol L$$^{-1}$$) / Ag
The emf of the cell is found to be 0.421 volt at 298 K. The standard potential of half-reaction M$$^{3+}$$ + 3e$$^-$$ $$\rightarrow$$ M at 298 K will be:
(Given: $$E^\ominus_{Ag^+/Ag}$$ at 298 K = 0.80 volt)
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The rate of a reaction quadruples when the temperature changes from 300 to 310 K. The activation energy of this reaction is:
(Assume Activation energy and pre-exponential factor are independent of temperature;
ln(2) = 0.693; R = 8.314 J mol$$^{-1}$$ K$$^{-1}$$)
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Adsorption of gas on a surface follows Freundlich adsorption isotherm. The plot of log $$\frac{x}{m}$$ versus log(P) gives a straight line with slope equal to 0.5, then:
($$\frac{x}{m}$$ is the mass of the gas adsorbed per gram of adsorbent)
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The number of P $$-$$ OH bonds and the oxidation state of phosphorus atom in pyrophosphoric acid (H$$_4$$P$$_2$$O$$_7$$), respectively are:
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The correct sequence of decreasing number of $$\pi$$-bonds in the structure of $$H_2SO_3$$, $$H_2SO_4$$ and $$H_2S_2O_7$$ is:
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XeF$$_6$$ on partial hydrolysis with water, produces a compound X. The same compound X is formed when XeF$$_6$$ reacts with silica. The compound X is:
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[Co$$_2$$(CO)$$_8$$] displays
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In the following reaction sequence:
Compound I is
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A compound of molecular formula C$$_8$$H$$_8$$O$$_2$$ reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with concentrated NaOH forms benzyl alcohol as one of the products. The structure of the compound is:
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Among the following compounds, the increasing order of their basic strength is:
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Which of the following is a biodegradable polymer?
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The incorrect statement among the following is
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