JEE-MAIN SERIES Chemistry
Heavy Water
4 previous year questions.
Volume: 4 Ques
Yield: Medium
High-Yield Trend
2
2023 2
2022 Chapter Questions 4 MCQs
01
PYQ 2022
medium
chemistry ID: jee-main
Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to
1
CaCO3 and Mg(OH)2
2
CaCO3 and MgCO3
3
Ca(OH)2 and MgCO3
4
Ca(OH)2 and Mg(OH)2
02
PYQ 2022
medium
chemistry ID: jee-main
Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 gof water, it depresses the freezing point by 0.2Ā°C. The percentage association of solute A in water is :
[Given : Molar mass of A = 93 g molā1. Molal depression constant of water is 1.86 K kg molā1.]
1
50%
2
60%
3
70%
4
80%
03
PYQ 2023
medium
chemistry ID: jee-main
Given below are two statements:
Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening of water.
Statement II: Synthetic resin method results in the formation of soluble sodium salts.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening of water.
Statement II: Synthetic resin method results in the formation of soluble sodium salts.
In the light of the above statements, choose the most appropriate answer from the options given below:
1
Both the Statements I and II are correct
2
Both the Statements I and II are incorrect
3
Statement I is correct but Statement II is incorrect
4
Statement I is incorrect but Statement II is correct
04
PYQ 2023
medium
chemistry ID: jee-main
Match List-I with List-II :
| List-I (Species) | List-II (Maximum allowed concentration in ppm in drinking water) | ||
| A | F- | I | < 50 ppm |
| B | II | < 5 ppm | |
| C | III | < 2 ppm | |
| D | Zn | IV | < 500 ppm |
Choose the correct answer from the options given below :
1
A-III, B-II, C-I, D-IV
2
A-IV, B-III, C-II, D-IĀ
3
A-II, B-I, C-III, D-IV
4
A-I, B-II, C-III, D-IV