ECAT Chemistry Online Test With Answers

ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Which of the following will be good conductor of electricity Pure distilled water Molten NaCl Dilute solution of glucose Chloroform
2 In KO2the oxidation state of oxygen is -2 -1 +1/2 -1/2
3 F2, Cl2, Br2and l2lie below SHE is the Electro chemical series that is why these Undergo reduction Undergo oxidation Liberate H<sub>2</sub>gas with steam None of these
4 In the electrolysis of fused bauxite (Al2O32H2O) with fused Cryolite (Na3AlF6) using carbon rods as anode. The product obtained at cathode is Na metal F<sub>2</sub>gas Al metal O<sub>2</sub>gas
5 During redox reaction an oxidizing agent Gains electrons Is oxidized Loses electrons Hydrolysed
6 When aqueous solution of NaOH is electrolysed useing graphite electrodes, the product obtained at anode is O<sub>2</sub>gas H<sub>2</sub>gas Na metal Na<sub>2</sub>O
7 In passage of electricity through aqueous solution of AgNO3silver dissolves at anode to form Ag+, the electrodes are Silver metal Pt metal Graphite Copper metal
8 In the reaction K2Cr2O7+ HCl + CrCl3+ Cl2+ H2O the element which is reduced is K Cl Cr H
9 A solution has 92 g of ethyl alcohol, 96 g of methyl alcohol and 90 g of water. Mole percentage of ethyl alcohol in the solution is 10 20 25 50
10 Hydrochloric acid available in the laboratory is 36% w/w. The density of HCl solution is 1.19 g cm-3. The molarity of HCl solution is 10.23 moles dm<sup>-3</sup> 11.55 moles dm<sup>-3</sup> 11.73 moles dm<sup>-3</sup> 12.67 moles dm<sup>-3</sup>
11 Water shows maximum density at 4°C 0°C 100°C -4°C
12 What is the molarity of the solution that contains 20 grams of NaOH in 500 ml of solution [Na = 23, O = 16, H = 1] 0.25 0.5 1 20
13 10 ml of 1.5 M NaOH solution is neutralized by 20 ml of a-M HCl solution. The value of 'a' will be 1.0 0.75 0.5 0.25
14 The percentage by weight of NaCl, if 6.0 g of NaCl is dissolved in 120 g of water is 10.5 % 5% 8.02% 11.5%
15 A solution containing maximum amount of solute dissolved at a given temperature is called Saturated solution Unsaturated solution Supersaturated solution Impure solution
16 The process in which solvent particles surround solute particles is called Hydrolysis Hydration Solvation Dissolution
17 A solution of two component is called Binary solution Dilute solution Original solution Standard solution
18 Coligative properties are the properties of Dilute solution which behave as nearly ideal solutions Concentrated solutions which behave as nearly non-ideal solution Both (i) and (ii) Neither (i) and (ii)
19 Which is independent of temperature Molarity Molality Normality Mole fraction
20 In azeotropic mixture showing negative deviation form Raoult's law show Higher b.p. than either Lower b.p. than either No change in b.p. None of these
21 An azeotropic mixture of two liquids boils at a lower temperature than either of them when lower temperature It is saturated it shows positive deviation from Raoult's law It shows negative deviation form Raoult's law It is metastable
22 Use of glycol as anti freeze in the automobile is an important application of Colligative property Raoult's law Fractional crystallization Prrhenivs law
23 Compared to a 1.0M aqueous solution of calcium chloride will have The same freezing and boiling point A lower freezing point and lower boiling point A lower freezing point and higher boiling point A higher freezing point and higher boiling point
24 A one thousand dm3sample of water contains one gram of iron (iii) ions what is the concentration in parts per million of Fe3f(eq) in parts per million 0.001 0.01 0.1 1.0
25 The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of Rault law Henry law Dalton law Grahms law
26 Two solutions of NaCl and KCl are prepared separately by dissolving 0.1 M of the solute in water. Which of the following statements is not true for these solution KCl solution will have higher boiling point than NaCl solution Both the solutions have same boiling KCl and NaCl solution possess same vapour pressure KCl solution possess same freezing point at NaCl solution
27 Which of the following solution has the highest boiling point 5.85% solution of sodium chloride 18.0% solution of glucose 6.0% solution of urea All have the same boiling point
28 Which statement is not true. A solution is a homogeneous mixture of Two ionic substance like NaCl and HCl Two molecular substances sugar and water A solute and a solvent 1% NaHCO<sub>3</sub>in water NaCl and sand
29 Heat of neutralization of weak acid and a strong base is 13.7 Kcal Less than 13.7 Kcal Greater than 13.7 Kcal None of these
30 The heat of formation of SO2(g) is -70.9 Kcal. The energy required for the decomposition of 1 mole of SO2(g) is 35.50 Kcal 70.9 Kcal 141.8 Kcal -35.9 Kcal
Download This Set

Is this page helpful?