ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Which one of the following is an ideal solution that obeys Rault's law Ethanol + water Benzene + toluene HCI + water Acetone + chloroform
2 The sum of mole fractions (X) of components of solution is equal to 100 200 One Zero
3 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
4 Mixture of alcohol and water can be separated by Solvent extraction techniques Crystallization Precipitation and filtration Fractional distillation
5 Hydrolysis of potassium acetate produces Acidic solution Neutral solution Basic solution None of these
6 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
7 Freezing point depression is measured by Beckmann's apparatus Lands Berger's method Antifreeze apparatus All of the above
8 Zeotropic mixture Obey Henry's law Obey Raoult's law Does not obey Raoult's law Obey Dalton's law
9 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
10 The substance which contains the water of crystallization is called Hydrated Solvated Crystal None
11 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
12 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%
13 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%
14 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
15 50 cm3of 0.05 molar nrea (N2H4CO) solution has % W/N concentration 6% 3% 0.3 % 0.6 %
16 10% aqueous solution of NaCI has molarity 1.7 M 2.7 M 0.17 M 3.7 M
17 0.1 molar glucose (C6H12O6) solution has the % W/N 1.8% 18% 0.18% 2.8%
18 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
19 The term cryoscopy is used for Depression of freezing point Elevation in boiling poing Lowering of vapour pressure Osmotic pressure
20 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
21 The amount of solute present in the given amount of solvent is called Molarity Molality Concentration Solubility
22 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
23 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
24 What mass of NaOH is required to prepare 2.5 dm3of 1.5 M NaOH solution 130 g 140 g 150 g 160 g
25 How many cm3of 1 M H2SO4required to neutralize 10 cm3of 1 M NaOH 2 cm<sup>3</sup> 2.5 cm<sup>3</sup> 5 cm<sup>3</sup> 10 cm<sup>3</sup>
26 The term ebullioscopy is used for Depression of freezing point Elevation in boiling point Lower of vapour pressure None of the above
27 What is the molarity of a solution containing 15.0 g urea in 500 cm3of solution 0.5 M 1 M 1.5 M 2 M
28 Precipitation will occur until the ionic product becomes Equal to K<sub>sp</sub> Lesser than K<sub>sp</sub> Greater than K<sub>sp</sub> None of these
29 If ionic product of a solution is greater than solubility product, the solution is Supersaturated Saturated Unsaturated None of these
30 If the ionic product of a solution is less than the solubility product, the solution is Supersaturated Unsaturated Ideal Saturated
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