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Question Bank Solutions for ISC (Arts) Class 12 - CISCE - Chemistry (Theory)

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In non-ideal solution, what type of deviation shows the formation of maximum boiling azeotropes?

[1.01] Raoult's law and colligative properties
Chapter: [1.01] Raoult's law and colligative properties
Concept: Vapour Pressure of Liquid Solutions > Vapour Pressure of Liquid- Liquid Solutions

Define electrochemical cell

[6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Chapter: [6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Concept: Batteries > Primary Batteries

State Raoult’s law for the solution containing volatile components

[1.01] Raoult's law and colligative properties
Chapter: [1.01] Raoult's law and colligative properties
Concept: Vapour Pressure of Liquid Solutions > Vapour Pressure of Liquid- Liquid Solutions

Why does the cell potential of mercury cell remain constant throughout its life?

[6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Chapter: [6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Concept: Batteries > Primary Batteries

What is rate of reaction?

[3.08] Rate of Reaction
Chapter: [3.08] Rate of Reaction
Concept: Rate of a Chemical Reaction

From the given cells:

Lead storage cell, Mercury cell, Fuel cell and Dry cell

Answer the following:

(i) Which cell is used in hearing aids?

(ii) Which cell was used in Apollo Space Programme?

(iii) Which cell is used in automobiles and inverters?

(iv) Which cell does not have long life?

[6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Chapter: [6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Concept: Batteries > Primary Batteries

What is meant by positive deviations from Raoult's law? Give an example. What is the sign of ∆mixH for positive deviation?

[1.01] Raoult's law and colligative properties
Chapter: [1.01] Raoult's law and colligative properties
Concept: Vapour Pressure of Liquid Solutions > Vapour Pressure of Liquid- Liquid Solutions

Define azeotropes. 

[1.01] Raoult's law and colligative properties
Chapter: [1.01] Raoult's law and colligative properties
Concept: Vapour Pressure of Liquid Solutions > Vapour Pressure of Liquid- Liquid Solutions

Why does a solution containing non-volatile solute have higher boiling point than the pure solvent ?

[1.01] Raoult's law and colligative properties
Chapter: [1.01] Raoult's law and colligative properties
Concept: Vapour Pressure of Liquid Solutions > Vapour Pressure of Liquid- Liquid Solutions

Define the following term: Primitive unit cells

[0.02] States of Matters: Structure and Properties Solid State
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Concept: Crystal Lattices and Unit Cells - Introduction

What type of battery is mercury cell? Why is it more advantageous than dry cell?

[6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Chapter: [6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Concept: Batteries > Primary Batteries

How will you distinguish between the following pairs of terms : Crystal lattice and unit cell

 

[0.02] States of Matters: Structure and Properties Solid State
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Concept: Crystal Lattices and Unit Cells - Introduction

Name the type of cell which was used in Apollo space programme for providing electrical power.

[6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Chapter: [6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Concept: Batteries > Primary Batteries

Define terms: Fuel cell

[6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Chapter: [6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Concept: Batteries > Primary Batteries

Define the following terms: Secondary batteries

[6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Chapter: [6.02] Galvanic cells, mechanism of current production in a galvanic cell;
Concept: Batteries > Primary Batteries

Match the following

1 Rate constant a Dialysis
2 Biodegradable polymer b Glycine
3 Zwitterion c Arrhenius equation
4 Purification of colloids d PHBV
[1.05] Normality, molality
Chapter: [1.05] Normality, molality
Concept: Normality, Molality > Normality, Molality, Molarity, Mole Fraction, as Measures of Concentration

During the course of an SN1 reaction, the intermediate species formed is:

(1) a carbocation

(2) a free radical

(3) a carbanion

(4) an intermediate complex

[11.01] Organometallic compounds
Chapter: [11.01] Organometallic compounds
Concept: Organometallic Compounds > Organometallic Compounds

The solubility of silver chloride _______ in the presence of sodium: chloride because of ___________

[5.05] Solubility product and its applications
Chapter: [5.05] Solubility product and its applications
Concept: Solubility Product and Its Applications > Solubility product

In the complexes `[Fe(CN)_6]^(3-)` and `[pt(en) (H_2O)_2(NO_2 (Cl)^(2+)]``the respective oxidation numbers of central metal atoms are

1) +3 and +4

2) +6 and + 4

3) +6 and +3

4) +3 and + 3

[0.02] States of Matters: Structure and Properties Solid State
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Concept: Crystal Lattices and Unit Cells - Introduction

What is the effect of temperature on the ionic, product of water? How will it change the pH value of a neutral solution?

[3.04] Effect of temperature on the rate constant of a reaction
Chapter: [3.04] Effect of temperature on the rate constant of a reaction
Concept: Chemical Kinetics > Effect of Temperature on the Rate Constant of a Reaction
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