A 15% alcohol solution means

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Aayush Asked Feb 22

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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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A sample of coal gas contains 45% hydrogen, 30% methane, 15% carbon monoxide and 10% acetylene. 100 vol. of this gas were mixed with 200 vol. of oxygen and exploded. Find the composition of the resulting mixture on cooling.

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Ammonia contains 82.35% of nitrogen and 17.65% hydrogen. Water contains 88.9% of oxygen and 11.1% of hydrogen. Nitrogen dioxide contains 63.15% of oxygen and 36.85% of nitrogen. Show by calculations from these data which law of chemical combination is verified.

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The vapor pressures of benzene, toluene and a xylene are 75 Torr, 22 Torr and 10 Torr at 20°C. Which of the following is not a possible value of the vapor pressure of an equimolar binary/ternary solution of these at 20°C? Assume all form ideal solution with each other.

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What are the two ways by which a saturated solution can be change to the unsaturated solution?

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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?

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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?

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Aayush Asked Jan 31

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When a solution containing 50 gm ethylene glycol in 200 gm water is cooled to –9.3°C, the amount of ice separated out is —

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Aayush Asked Jan 4

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A current of 0.1 A was passed for 4 hrs. through a solution of cuprocyanide and 0.3745g of copper was deposited on the cathode. Calculate the current efficiency for the copper deposition. (Cu GAM 63.5 or Cu -63.5).

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For a saturated solution of AgCl at $25^{\circ} C, k =3.4 \times 10^{-6} ohm ^{-1} cm ^{-1}$ and that of $H _{2} O (\ell)$ used is $2.02 \times 10^{-6} ohm ^{-1} cm ^{-1}$.

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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 $0.02 M$.

Aayush Asked Jan 3

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We have taken a saturated solution of $AgBr$. $K _{ sp }$ of $AgBr$ is $12 \times 10^{-14}$.

Aayush Asked Jan 3

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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 Nov 28, 2023

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Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn blue?

ALOK_RAJ Asked Nov 28, 2023

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ALOK_RAJ Asked Nov 19, 2023

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A solution contains 0.18g per mL of a substance X whose molecular weight is

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ALOK_RAJ Asked Oct 18, 2023

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A resistance of $50 \Omega$ is registered when two electrodes are suspended into a beaker containing a dilute solution of a strong electrolyte such that exactly half of the them are submerged into solution.

ALOK_RAJ Asked Oct 18, 2023

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3.7g of an oxide of a metal was heated with charcoal. The liberated CO2 was absorbed in caustic soda solution and weighed 1.0g

Chandan Asked Sep 29, 2023

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A mixture of 0.535g of ethanol and acetaldehyde when treated with a Fehling solution gave 1.2g of a red precipitate.

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Two faraday's of electricity are passed through a solution of CuSO4. The mass of copper deposited at the cathode is (at. mass of Cu=63.5 amu)

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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?

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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

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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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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 :

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