ECAT Chemistry Chapter 9 Solutions Online Test With Answers

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ECAT Chemistry Chapter 9 Solutions Online Test

Sr. # Questions Answers Choice
1 Elevation of boiling point is measured by Beckmann's apparatus Lands Berger's method Antifreeze apparatus None of these above
2 A Solution containing 6.8 g of non-ionic solute in 100g of water was found to freeze at -0.93°C. If krfor water is 1.86 and molecular mars of solute is 13.6 34 68 136
3 Which of the following liquid pairs shown a positive deviation from Raoult's law CH<sub>3</sub>COOH<sub>3</sub>+ CH<sub>3</sub>CI C<sub>6</sub>H<sub>6</sub>+ CH<sub>4</sub>OH H<sub>2</sub>O + HCI H<sub>2</sub>O + HNO<sub>3</sub>
4 Which statement is incorrect for and ideal solution The forces of attractions between solute and solvent molecules are same There is no evolution or absorption of heat Volume of the solution is less than sum of volumes of individual components Vapour pressure of solution is directly proportional to the mole fraction of solvent
5 Which of the following mixture of liquids show negative deviation form Raults law Ethyl alcohol and ether HCI and water Phenol- water Chlorobenene-bromobenene
6 Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point Methanol + CCI<sub>4</sub> Methanol + acetone Ether + HCI Acetone + chloroform
7 Which if the following has the highest freezing point at one atmosphere 0.1 M NaCI 0.1 M sugar solution 0.1 M BaCI<sub>2</sub> 0.1 M FeCI<sub>2</sub>solution
8 Which one of the following is an ideal solution that obeys Rault's law Ethanol + water Benzene + toluene HCI + water Acetone + chloroform
9 The sum of mole fractions (X) of components of solution is equal to 100 200 One Zero
10 The boiling point of an a zeotropic mixture of water and ethye alcohol is less than that of water and alcohol. The mixture shows That solution is highly saturated No deviation from Raoult's law Positive deviation from Raoult's law Negative deviation from Raoult's law
11 Mixture of alcohol and water can be separated by Solvent extraction techniques Crystallization Precipitation and filtration Fractional distillation
12 Hydrolysis of potassium acetate produces Acidic solution Neutral solution Basic solution None of these
13 Cane sugar is not soluble in benzene but soluble in water because Cane sugar is a macro molecule Cane sugar is an ionic compound Can sugar has hydrogen bonding Can sugar is an organic molecule
14 Freezing point depression is measured by Beckmann's apparatus Lands Berger's method Antifreeze apparatus All of the above
15 Zeotropic mixture Obey Henry's law Obey Raoult's law Does not obey Raoult's law Obey Dalton's law
16 Dust particles in smoke is a solution of the type Liquid is solute and solid is solvent Solid is solute and liquid is solvent Solid is solute and gas is solvent Gas is solute and solid is solvent
17 The substance which contains the water of crystallization is called Hydrated Solvated Crystal None
18 The number of moles of NH4CI dissolved in 500 cm3of its 15%, W/N solution is 1 mole 1.4 mole 2.0 mole 2.4 mole
19 A solution containing 5.8 grams acetone (CH3OCH3), 4.6 gram ethyl alcohol (C2H5OH) and 12 grams chloroform (CHl3) has mole fraction and mole percent of acetone 0.11, 10% 0.33, 33% 0.22, 22% 0.11, 33%
20 A solution consisting of 92 grams ethyl alcohol (C2H5OH) 96 grams methyl alcohol (CH3OH) 90 grams water the mole fraction and mole percent of methyl alcohol is 0.3. 30% 0.2, 30% 0.5, 30% 0.2, 20%
21 17.1 grams sucrose (C12H22O11) dissolved in 250 cm3 of solution. This has molarity 0.1 M 0.2 M 0.01 M 0.02 M
22 50 cm3of 0.05 molar nrea (N2H4CO) solution has % W/N concentration 6% 3% 0.3 % 0.6 %
23 10% aqueous solution of NaCI has molarity 1.7 M 2.7 M 0.17 M 3.7 M
24 0.1 molar glucose (C6H12O6) solution has the % W/N 1.8% 18% 0.18% 2.8%
25 The molarity of toluene solution in benzene is 0.22 if 5 grams of toluene dissolved, then mass of benzene is grams is 267 260 240 247
26 The term cryoscopy is used for Depression of freezing point Elevation in boiling poing Lowering of vapour pressure Osmotic pressure
27 The molarity of the solution containing x grams (NH4)2SO4in 500 cm3of the solution is 0.6 what is x 39.6 45.1 40.5 42.7
28 The amount of solute present in the given amount of solvent is called Molarity Molality Concentration Solubility
29 The molarity of solution containing 14.5 grams urea (N2H4CO) dissolved in 100 cm3of the solution is 1 molar 0.1 molar 0.2 molar 0.25 molar
30 What will be the molarity of solution if 103 g (NH4)2SO4is dissolved per 600 cm3of water 2.32 M 3.32 M 4.32 M 1.30 M
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