Increase in boiling point of aqueous solution of urea is 0.1The increase in the boiling point of aqueous solution of NaCl of same concentration is nearly —

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Aayush Asked Jan 31

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Van't Hoff factors of aqueous solutions of X, Y, Z are 1.8, 0.8 and 2.5. Hence, correct order of their boiling point is (assume equal concentrations in all three cases) :

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The specific conductivity of an aqueous solution of a weak monoprotic acid is $0.00033$ ohm $^{-1} cm ^{-1}$ at a concentration $0.02 M$.

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When 10 gm of a non-volatile solute is dissolved in 100 gm of benzene its boiling point raised by 1º. What is the molecular mass of solute?

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ALOK_RAJ Asked Aug 18, 2023

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300 ml of 3.0 M NaCl solution is added to 200 ml of 4.0 M BaCl2 solution. The concentration of Cl− ions in the resulting solution is —

ALOK_RAJ Asked Aug 18, 2023

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What do you mean by elevation of boiling point?

Chandan Asked Aug 2, 2023

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ANAND_YADAV Asked Jul 27, 2023

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Which one has the highest boiling point?

ANAND_YADAV Asked Jul 27, 2023

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ALOK_RAJ Asked Aug 18, 2023

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Which of the following molarity values of ions in an aqueous solution containing 5.85 % w/v NaCl , 5.55 % w/v CaCl2 and 6% w/v NaOH is/are correct :

ALOK_RAJ Asked Aug 18, 2023

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Aayush Asked Feb 1

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A 10% w/w solution of cane sugar has undergone partial inversion according to the reaction : Sucrose + water →glucose + fructose . The boiling point of the solution is 100.7°C. What fraction of sugar has inverted?

Aayush Asked Feb 1

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The coagulation of 10 mL of a colloidal sol of gold is completely prevented by addition of 0.25 g of a substance X to it before adding 1 mL of 10% NaCl solution. The gold number of X is

Chandan Asked Sep 15, 2023

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ALOK_RAJ Asked Nov 28, 2023

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An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralize 10 mL of this solution is

ALOK_RAJ Asked Nov 28, 2023

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ANAND_YADAV Asked Aug 7, 2023

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Resistance of 0.2 M solution of an electrolyte is 50Ω. The specific conductance of the solution is $1.4 {~S}{~m}^{-1}$. The resistance of $0.5 {M}$ solution of the same electrolyte is $280 \Omega$.

ANAND_YADAV Asked Aug 7, 2023

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Chandan Asked Aug 13, 2023

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The equivalent conductance of NaCl at concentration C and at infinite dilution are $\lambda_C$ and $\lambda_{\infty}$, respectively. The correct relationship between $\lambda_C$ and $\lambda_{\infty}$ is given as (where, the constant B is positive)

Chandan Asked Aug 13, 2023

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Chandan Asked Aug 9, 2023

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Dissolving 120 g of urea (molar mass 60 ) in 990 g of water gave a solution of density 1.11 g / ml. Select the correct statements :

Chandan Asked Aug 9, 2023

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ALOK_RAJ Asked Nov 28, 2023

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When chlorine water is added to an aqueous solution of potassium halide in presence of chloroform, a violet colour is obtained.

ALOK_RAJ Asked Nov 28, 2023

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ALOK_RAJ Asked Apr 24, 2022

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The species A, K and Ca2+ contain the same number of electrons. In which order do their radii increase?

ALOK_RAJ Asked Apr 24, 2022

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Aayush Asked Jan 30

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Which of the following methods of expressing concentration of a solution is/are independent of temperature?

Aayush Asked Jan 30

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Chandan Asked Aug 6, 2023

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The osmotic pressure of sugar solution is 2.46 atm at 27°C. Calculate the concentration of the solution.

Chandan Asked Aug 6, 2023

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Aayush Asked Jan 31

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2.56 g of sulphur in 100 g of CS2 has depression in freezing point of 0.01°$C.K_f$ = 0.1°molal$^{-1}$. Hence, the atomicity of sulphur in CS2 is —

Aayush Asked Jan 31

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Shiv roshan kushwaha Asked May 1, 2022

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The pressure of the liquid is not same at each point in the sea. If a diver dives into the sea, at which point the the diver will feel the maximum pressure?

Shiv roshan kushwaha Asked May 1, 2022

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Aayush Asked Feb 2

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If 6.3 g of NaHCO3 are added to 15.0 g of CH3COOH solution, the residue is found to weight 18.0 g. What is the mass of CO2 released in this reaction?

Aayush Asked Feb 2

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Aayush Asked Feb 2

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0.05 mole of LiAIH4 in ether solution was placed in a flask containing 74g (1 mole) of t-butyl alcohol. The product LiAIHC12H27O3 weighed 12.7 g. If Li atoms are conserved, the percentage yield is —

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Chandan Asked Sep 15, 2023

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A cell is containing two H electrodes. The negative electrode is in contact with a solution of 10^{-6} M H+ ions. The emf of the cell is 0.118 V at $25^{\circ} {C}$. What is the $\left[{H}^{+}\right]$at positive electrode?

Chandan Asked Sep 15, 2023

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ALOK_RAJ Asked Aug 19, 2023

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What approximate volume of 0.40 M Ba(OH)2 solution must be added to 50.0 mL of 0.30 M NaOH solution to get a solution in which the molarity of the OH− ions is 0.50 M?

ALOK_RAJ Asked Aug 19, 2023

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Chandan Asked Aug 6, 2023

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Calculate the osmotic pressure of 5% solution of urea at 273 k.

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ALOK_RAJ Asked Nov 28, 2023

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Amongst H2O, H2S, H2Se and H2Te, the one with the highest boiling point is

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A galvanic cell is constructed as follows. A half-cell consists of a platinum wire immersed in a solution containing $1.0 {M}$ of ${Sn}^{2+}$ and $1.0 {M}$ of ${Sn}^{4+}$, and another half-cell has a thallium rod immersed in a 1.0 M solution of ${Tl}^{+}$.

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Aayush Asked Feb 2

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0.65 g of Zn was put in a solution of 1.5 g CuSO4 and the Cu. thus precipitated weighed 0.635 g. what weight of the zinc sulphate will be recovered on evaporation of the remaining solution?

Aayush Asked Feb 2

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Aayush Asked Jan 30

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What volume of 0.25 M HNO3 (nitric acid) solution reacts with 50 mL of 0.15 M Na2CO3 (sodium carbonate) solution in the following reaction —

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ANAND_YADAV Asked Jul 30, 2023

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100 mL of sulphuric acid solution (sp. gr. $=1.84$ ) contains 98% by weight of pure acid. Calculate the volume of 0.46M NaOH solution (in L) required to just neutralize the above acid solution.

ANAND_YADAV Asked Jul 30, 2023

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ANAND_YADAV Asked Jul 30, 2023

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61.25% (w/w) H2SO4 stock solution has a density of $1.6 g mL ^{-1}$. The molecular weight of H2SO4 is $98 g mol ^{-1}$. The volume $( mL )$ of stock solution required to prepare a 200 mL solution of 0.3 M H2SO4 is :

ANAND_YADAV Asked Jul 30, 2023

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ALOK_RAJ Asked Dec 1, 2023

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Lemon juice normally has a pH of 2 . If all the acid in the lemon juice is citric acid and there are no citrate salts present, then what will be the citric acid concentration (H.Cit) in the lemon juice?

ALOK_RAJ Asked Dec 1, 2023

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Chandan Asked Sep 11, 2023

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In a reaction A (g) + 2 B (g) $\rightleftharpoons$ 2 C (g), 2 moles of ' $A ^{\prime}, 3$ moles of 'B' and 1 mole of 'C' are placed in a 2 L flask and the equilibrium concentration of 'C' is 1 mol / L.

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ALOK_RAJ Asked Aug 6, 2023

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What is the significance of the large increase in the third ionisation enthalpy of Ca and the fifth ionisation enthalpy of Si?

ALOK_RAJ Asked Aug 6, 2023

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ALOK_RAJ Asked Aug 4, 2023

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In a reversible chemical reaction having two reactants in equilibrium with one product, if the initial concentration of both the reactants is doubled, then the equilibrium constant will :

ALOK_RAJ Asked Aug 4, 2023

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Increase in boiling point of aqueous solution of urea is 0.1The increase in the boiling point of aqueous solution of NaCl of same concentration is nearly —

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