11th Chemistry Weekly Test - 2 ( Solutions )

MABS Institution

11th Chemistry Weekly Test - 2 ( Solutions )-Aug 2020

Time : 1.30 Hours

Part - A

Generic 2 - Answer All Question

What are ideal solution? Give example.

Why in the dissolution of CaCI₂, the solubility increases moderately with high temperature?

What is abnormal molar mass?

At 400 K 1.5 g of an unknown substance is dissolved in solvent and the solution is made to 1.5 L. Its osmotic pressure is found to be 0.3 bar. Calculate the molar mass of the unknown substance.

What is osmosis?

What is meant by stock solution (or) standard solution? What is meant by working standard?

What are the non-aqueous solution? Give example

Define PPM.

What is condensation?

How many moles of solute particles are present in one litre of 10^-4 M potassium sulphate?

Part - B

Generic 5 - Answer All Question

(i) When does a non-ideal solution is said to show a negative deviation?
(ii) Analyse the deviation observed in the solution of phenol and aniline.

What is the molarity of the solutions prepared by diluting 25.0 mL of 0.312M MgCl₂ solution to each of the following volumes (a) 40 mL (b) 100mL (c) 350mL?

Explain the positive deviation exhibited by non-ideal solutions with preference to a solution of ethyl alcohol and water
A sample of drinking water was found to be contaminated with chloroform (CHCl₃) which is considered as carcinogen. The level of contamination was 15ppm (by mass).
(i) Express this in percent by mass
(ii) - Calculate the molality of chloroform in the water sample.

(i) What is Osmotic pressure and how is it related to the molecular mass of a non volatile substances?
(ii) What advantage the osmotic pressure method has over the elevation of boiling point method for determining the molecular mass?

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11th Chemistry Weekly Test - 2 ( Solutions )

MABS Institution

11th Chemistry Weekly Test - 2 ( Solutions )-Aug 2020

Part - A

Generic 2 - Answer All Question

What are ideal solution? Give example.

Why in the dissolution of CaCI2, the solubility increases moderately with high temperature?

What is abnormal molar mass?

At 400 K 1.5 g of an unknown substance is dissolved in solvent and the solution is made to 1.5 L. Its osmotic pressure is found to be 0.3 bar. Calculate the molar mass of the unknown substance.

What is osmosis?

What is meant by stock solution (or) standard solution? What is meant by working standard?

What are the non-aqueous solution? Give example

Define PPM.

What is condensation?

How many moles of solute particles are present in one litre of 10-4 M potassium sulphate?

Part - B

Generic 5 - Answer All Question

(i) When does a non-ideal solution is said to show a negative deviation? (ii) Analyse the deviation observed in the solution of phenol and aniline.

What is the molarity of the solutions prepared by diluting 25.0 mL of 0.312M MgCl2 solution to each of the following volumes (a) 40 mL (b) 100mL (c) 350mL?

Explain the positive deviation exhibited by non-ideal solutions with preference to a solution of ethyl alcohol and water

A sample of drinking water was found to be contaminated with chloroform (CHCl3) which is considered as carcinogen. The level of contamination was 15ppm (by mass). (i) Express this in percent by mass (ii) - Calculate the molality of chloroform in the water sample.

(i) What is Osmotic pressure and how is it related to the molecular mass of a non volatile substances? (ii) What advantage the osmotic pressure method has over the elevation of boiling point method for determining the molecular mass?

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Why in the dissolution of CaCI₂, the solubility increases moderately with high temperature?

How many moles of solute particles are present in one litre of 10^-4 M potassium sulphate?

(i) When does a non-ideal solution is said to show a negative deviation?
(ii) Analyse the deviation observed in the solution of phenol and aniline.

What is the molarity of the solutions prepared by diluting 25.0 mL of 0.312M MgCl₂ solution to each of the following volumes (a) 40 mL (b) 100mL (c) 350mL?

A sample of drinking water was found to be contaminated with chloroform (CHCl₃) which is considered as carcinogen. The level of contamination was 15ppm (by mass).
(i) Express this in percent by mass
(ii) - Calculate the molality of chloroform in the water sample.

(i) What is Osmotic pressure and how is it related to the molecular mass of a non volatile substances?
(ii) What advantage the osmotic pressure method has over the elevation of boiling point method for determining the molecular mass?