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Solutions — JEE Main & Advanced NSEC PYQs

18 previous year questions from Solutions with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

18 questionsNSECSolutions on every page

When 100 g each of the salts NaCl , MgSO ₄, Ca ( NO ₃ )₂, ~K ₂ CO ₃ , were dissolved separately in 1.0 kg of water, the solution with the highest boiling point will be of

Olympiad workbook Solution View → 2

About sea water, which of the following statement/s is/are correct? I. Frozen sea water melts at a lower temperature than pure ice II. Boiling point of sea water increases as it ev

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A student intended to prepare 1000 mL of a 10 ppm solution of K ⁺ from KCl . He made appropriate calculations, weighed the salt accordingly and prepared the solution. However, afte

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A solution of CuSO ₄ 5 H ₂ O in methanol has [ Cu ²⁺ ]=1.00 mg per 1000 g of methanol. The molarity of Cu ²⁺ in this solution is Y 10⁻⁵ ~mol ~L ⁻¹ . Y is : ( . Given- density of me

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In cold climate, the water in a radiator of a car gets frozen causing damage to the radiator. Ethylene glycol is used as an antifreezing agent. The amount of ethylene glycol that s

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The mass ( g ) of NaCl that has to be dissolved to reduce the vapour pressure of 100 g of water by 10 % ( . Molar mass of . NaCl =58.5 ~g ~mol ⁻¹ ) is

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In reverse osmosis the flow of solvent across semi permeable membrane occurs

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When a certain amount of a univalent salt AB (molar mass =54 ~g ~mol ⁻¹ ) was dissolved in 0.1 dm ^3 of water, the relative lowering of the vapour pressure was found to be 3.55 % .

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At room temperature, NaCl ( s ) and KCl ( s ) were taken in equal masses and dissolved in equal volumes of water in two separate closed containers I and II respectively. Of the fol

Olympiad workbook Solution View → 10

In cold climate, the water in a radiator of a car gets frozen causing damage to the radiator. Ethylene glycol is used as an antifreezing agent. The amount of ethylene glycol that s

Olympiad workbook Solution View → 11

The mass ( g ) of NaCl that has to be dissolved to reduce the vapour pressure of 100 g of water by 10 % ( . Molar mass of . NaCl =58.5 ~g ~mol ⁻¹ ) is

Olympiad workbook Solution View → 12

A student intended to prepare 1000 mL of a 10 ppm solution of K ⁺ from KCl . He made appropriate calculations, weighed the salt accordingly and prepared the solution. However, afte

Olympiad workbook Solution View → 13

At room temperature, NaCl ( s ) and KCl ( s ) were taken in equal masses and dissolved in equal volumes of water in two separate closed containers I and II respectively. Of the fol

Olympiad workbook Solution View → 14

When 100 g each of the salts NaCl , MgSO ₄, Ca ( NO ₃ )₂, ~K ₂ CO ₃ , were dissolved separately in 1.0 kg of water, the solution with the highest boiling point will be of

Olympiad workbook Solution View → 15

A solution of CuSO ₄ 5 H ₂ O in methanol has [ Cu ²⁺ ]=1.00 mg per 1000 g of methanol. The molarity of Cu ²⁺ in this solution is Y 10⁻⁵ ~mol ~L ⁻¹ . Y is : ( . Given- density of me

Olympiad workbook Solution View → 16

About sea water, which of the following statement/s is/are correct? I. Frozen sea water melts at a lower temperature than pure ice II. Boiling point of sea water increases as it ev

Olympiad workbook Solution View → 17

In reverse osmosis the flow of solvent across semi permeable membrane occurs

Olympiad workbook Solution View → 18

When a certain amount of a univalent salt AB (molar mass =54 ~g ~mol ⁻¹ ) was dissolved in 0.1 dm ^3 of water, the relative lowering of the vapour pressure was found to be 3.55 % .

Olympiad workbook Solution View →

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