Depression in Freezing Point
Trending Questions
Q. the vant hoff factor of 0.01 M Al2(SO4)3 solution is 4.20.the degree of dissocation is ?
Q. If 0.2molar , 100ml hcl solution mixed with 0.1molar , 300ml hcl solution find molarity of mixture
Q. Mole of thiosulphate ions required to react completelywith one mole of permanganate ion in faintly alkalinemedium is
Q.
Natural sample of cupric carbonate contains 51.35% of copper, 9.74% of oxygen and 38.91% of carbon. Synthetic sample of the compound will contain:
51.35% of Copper, 9.74% of oxygen and 38.91% of carbon
9.74% of copper, 38.91% of oxygen and 9.74% of carbon
51.35% of copper, 19.74% of oxygen and 30.91% of carbon.
9.74% copper, 9.74% of oxygen and 38.91% of carbon
Q. When 3.00 mole of A and 1.00 mole of B are mixedin a 1.00 litre vessel, the following reaction takesplaceA(g) + B(g) 2C(g)The equilibrium mixture contains 0.5 mole of C.What is the value of equilibrium constant for thereaction?9 (z)(4) None of these(1) 0.128(3) 1.5
Q. Which of the following contains the least number
of molecules ?
a) 4.4 g of CO2 b) 1.4 g of N2
c) 2 g of H2 d) 1 g of O2
Q. But-2-ene + hot KMnO4 gives 2 molecules of ethanoic acid, explain the mechanism of reaction.
Q. How to calculate n factor while calculating normality?
Q. 25 ml. of a solution containing HCl was treated with excess of M/5 KIO3 and KI solution of unknown concentration where I2 liberated is titrated against a standard solution of 0.021M Na2s2o3 solution whose 24 mL were used up. Find the strength of HCI and volume of KIO3 solution consumed.
Q.
What is abnormal osmotic pressure?
Q.
A 0.10 M solution of a weak acid, HX, is 0.059% ionized. Evaluate Ka for the acid.
3.8 x 10-9
3.5 x 10-8
7.0 x 10-6
4.2 x 10-6
Q. 37. The mole of Agcl formed, when 17 g of AgNO, is mixed with 1.435 g of NaCI is (Molar massAgNO, 170 g, Agci 143.5g)
Q. 4.A sample of copper sulphate pentahydrate , CuSO4.5H2O contains 3.782g of Cu. How many grams of oxygen are in this sample.
Q. On heating in air, 0.12g of metal gave 0.20g of its oxide.The carbnate and nitrate of the metal werw found to contain 28.5%and 16.2% of the metal respectively.Calculate by applying law of cons†an t proportions, the masses of oxide of the metal that will be obtained by heating 10g each of the carbonate and the nitrate.
Q. Sodium nitrate on reduction with Zn in presence of NaOH solution produces NH3. Mass of sodium nitrate absorbing 1 mole of electron will be ?
(a)7.750 (b)10.625 (c)8.000 (d)9.875
Q.
what is the meaning of ionic product of water?
Q. 23.When 0.1 mole CH3COOH is present in a litre solvent it shows elevation in boiling point of 0.75^° C. Acid dissociation constant will be – (Kb = 5 K Kg mol–1) and (M Image not present m)
Q. Q 39/75 Calculate the percentage of water of crystalline in Blue vitrial (CuSO4.5H20) (Atomic masses are given as Cu = 63.5S 32, O 16, H = 1) 7.2% 36% 56.42% 64%
Q. 56. The specific heat of metal is 0.836J/g . The appropriate atomic mass is - 16 , 64, 40, 32
Q. Ammonium carbamate when heated to 200^° C gives a mixture of NH3 and CO2 vapours with a density of 16.0. What is the degree of dissociationof ammonium carbamate?
Q. The percentage compositions of ammonia, water and nitrogen dioxide are given below.
Ammonia: 82.35% N and 17.65% H
Water: 11.11% H and 88.89% O
Nitrogen dioxide: 30.43% N and 69.57% O
Prove that the given information explains the law of reciprocal proportions.
Q. 94. when ethyl alcohol and acetic acid mixed together in equimolar proportion , equilibrium is attained when two third of acid and alcohol are consumed . the equilibrium constant of reaction will be
Q. E_{n }=-313.6/n^2 kcal/mole.If the value of E=-34.4kcal/mole, to which value doesn correspond
Q. 20g of CaCO3 gives we 10g of CaO and CO2 the percentage purity of CaCO3 is
Q. 29. 1 mole of A, 1.5 mole of B and 2 mole of C are taken in a vessel of volume 1 Litre. At equilibrium conc of C is 0.5 mole/L.Equilibrium constant for the reaction A(g)+B(g)=C(g) is?
Q. In cathode ray experiment, why the pressure was decresed insiside the cathode tube and why the wall of the cathode tube illuminating?
Q. An impure sample of a g 1.5 gram is heated with if to form 0.124 gram of Ag2S what was the percentage yield of ag2s
Q.
Two elements A and B form compounds of formula AB2 and AB4. When dissolved in 20.0g of benzene 1.0g of AB2 lowers freezing point by 2.3°C whereas 1.0g of AB4 lowers freezing point by 1.3°C. The Kf for benzene. The atomic masses of A and B are
- 27, 45
- 42, 25
- 52, 48
- 48, 52
Q. 52.Calculate the moles of pure kclo3 present in x gram of a sample of impure KCLO3 which on strong heating gives y ml of o2 at STP?
Q. if 3 flasks of each 1L capacity are separately filled with gases O_2, CO_2 and SO_3 respectively at the same temperature and pressure , then ratio of no. of atoms in above flask respectively
