ISC Class 12 Chemistry Exam 2024 : Important Match the Columns Questions for Last-Minute Revision

ISC Class 12 exams have started and you have very little time left for the Chemistry exam. Therefore, we are providing Important Match the Columns Questions in this article. You can study them well and score well in your exams.

To help you prepare effectively, we have prepared a list of Important Match the Columns Questions with detailed explanations. This guide aims to make your exam preparation easier by providing information on these questions.

Important Match the Columns Questions are a common format in competitive exams including ISC Class 12 Chemistry exam. By practicing "Match the Columns", you not only reinforce your knowledge but also learn to apply it effectively.

These questions cover various topics from the Chemistry syllabus. Remember, it is important to understand the logic behind each answer to score well.

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 ISC Class 12 Chemistry Exam 2024 : Important Match the Columns Questions 

1. Match the Columns :

Q1.

(a) 1-(p), 2-(t), 3-(r), 4-(s), 5-(q)

(b) 1-(t), 2-(q), 3-(s), 4-(p), 5-(r)

(c) 1-(q), 2-(p), 3-(r), 4-(t), 5-(s)

(d) 1-(r), 2-(t), 3-(q), 4-(s), 5-(p)

Ans. (c) 1-(q), 2-(p), 3-(r), 4-(t), 5-(s)

Explanation : Osmotic pressure is colligative property, dilute solution obeys Raoult's law, Cottrell's method uses ebullioscopic constant, temperature is an intensive property and isotonic solutions are solutions having same osmotic pressure.

Q2.

(a) 1-(r), 2-(p), 3-(q)

(b) 1-(q), 2-(r), 3-(p)

(c) 1-(p), 2-(r), 3-(q)

(d) 1-(p), 2-(q), 3-(r)

Ans. (a) 1-(r), 2-(p), 3-(q)

Explanation : The electrolyte used in dry cell, nickel-cadmium cell and leads storage cell is zinc chloride, potassium hydroxide and aqueous H2SO4 respectively.

Q3.

(a) (i) – (b), (ii) – (a), (iii) – (e), (iv) – (f), (v) – (c), (vi) - (d)

(b) (i) – (c), (ii) – (a), (iii) – (d), (iv) – (f), (v) – (b), (vi) - (e)

(c) (i) – (a), (ii) – (b), (iii) – (c), (iv) – (f), (v) – (e), (vi) - (d)

(d) (i) – (c), (ii) – (a), (iii) – (d), (iv) – (f), (v) – (e), (vi) - (b)

Ans. (b) (i) – (c), (ii) – (a), (iii) – (d), (iv) – (f), (v) – (b), (vi) – (e)

Explanation : 

(i) Catalyst alters the rate of reaction by lowering activation energy.

(ii) Molecularity cannot be fraction or zero. If molecularity is zero, reaction is not possible.

(iii) Second half-life of first order reaction is same as first because half-life time is temperature independent.

(iv) e^-Ea/RT refers to the fraction of molecules with kinetic energy equal to greater than activation energy.

(v) Energetically favourable reactions are sometimes slow due to improper orientation of molecule cause some ineffective collision of molecules.

(vi) Area under the Maxwell-Boltzmann curve is constant because total probability of molecule taking part in a chemical reaction is equal to one.

Q4.

(a) (a)-(2), (b)-(1), (c)-(4), (d)-(5), (e)-(3)

(b) (a)-(3), (b)-(4), (c)-(5), (d)-(1), (e)-(2)

(c) (a)-(5), (b)-(1), (c)-(5), (d)-(3), (e)-(4)

(d) (a)-(1), (b)-(5), (c)-(2), (d)-(4), (e)-(3)

Ans. (a) (a)-(2), (b)-(1), (c)-(4), (d)-(5), (e)-(3)

Explanation : Lanthanoid oxide is used in TV screens, Lanthanoid are used in production of iron alloy, Misch metal consists of lanthanoid metal + iron, Mischmetal is used in Mg-based alloy to produce bullets, shell and lighter flint and mixed oxides of lanthanoids are employed in petroleum cracking.

Q5.

Ans.

1. Mn²⁺ 

2. Cerium

3. Diamagnetic 

4. An acidic oxide 

5. Sc³⁺

6. A basic oxide 

7. Amphoteric oxide 

8. Scandium

Q6.

Ans.

1. TiC1₄ + A1 (CH₃)₃

2. Finally divided iron

3. V205 

4. Ni in presence of hydrogen 

5. Cu₂C₁₂

Q7. 

Ans. 

1. Lanthanoid 

2. Lanthanoid oxide

3. Mixed oxides of Lanthanoid are employed

4. Misch metal

5. Magnesium based alloy 

Q8. 

Ans.

1. Hexaamine cobalt(III) ion

2. Hexadentate

3. Werner's theory

4. Bidentate ligand

Q9.

Ans.

1. Wilkinson catalyst

2. Vitamin B₁₂

3. Blood pigment

4. Chlorophyll

Q10. 

(a) 1-(p), 2-(q), 3-(r),4-(s),5-(t)

(b) 1-(r), 2-(t), 3-(s),4-(q),5-(p)

(c) 1-(s), 2-(t), 3-(p),4-(q),5-(r)

(d) 1-(q), 2-(p), 3-(r),4-(s),5-(t)

Ans. (a) 1-(p), 2-(q), 3-(r),4-(s),5-(t)

Explanation : Ammonical silver nitrate is Tollen's reagent. DDT (dichloro diphenyl trichloroethane) is an insecticide. Freon are low toxicity gases or liquids which are generally used as refrigerants and as aerosol. Iodoform is used as an antiseptic. RMgX is a grignard reagent.

Q11. 

(a) 1-(s), 2-(q), 3-(r), 4-(p)

(b) 1-(s), 2-(q), 3-(p), 4-(r)

(c) 1-(p), 2-(r), 3-(q), 4-(s)

(d) 1-(r), 2-(s), 3-(q), 4-(p)

Ans. (d) 1-(r), 2-(s), 3-(q), 4-(p)

Explanation : Ethylene glycol is used as Antifreeze in car engines. Ethanol is used as solvent in perfumes. Phenol is used as starting material for picric acid. Methanol is also known as wood spirit.

Q12. 

(a) 1-(s), 2-(t), 3-(p), 4-(u), 5-(q), 6-(r)

(b) 1-(r), 2-(u), 3-(q), 4-(t), 5-(p), 6-(s)

(c) 1-(t), 2-(s), 3-(q), 4-(r), 5-(p), 6-(u)

(d) 1-(p), 2-(q), 3-(s), 4-(r), 5-(t), 6-(u)

Ans. (a) 1-(s), 2-(t), 3-(p), 4-(u), 5-(q), 6-(r)

Explanation : Anhydrous ZnCl2 + Conc. HCl is Lucas reagent. In Reimer Tiemann reaction, phenol is converted into an ortho hydroxybenzaldehyde using chloroform. Ethyl alcohol is obtained by the fermentation of sugar or starch from agricultural crops by yeasts or bacteria. Nitroglycerin is a powerful and unstable explosive that Alfred Nobel used in his invention of dynamite. Invertase is an enzyme. Tertiary alcohols can be tested by Lucas test.

Q13. 

(a) 1-(s), 2-(t), 3-(p), 4-(u), 5-(q), 6-(r)

(b) 1-(r), 2-(u), 3-(q), 4-(t), 5-(p), 6-(s)

(c) 1-(t), 2-(s), 3-(q), 4-(r), 5-(p), 6-(u)

(d) 1-(u), 2-(t), 3-(s), 4-(r), 5-(q), 6-(p)

Ans. (d) 1-(u), 2-(t), 3-(s), 4-(r), 5-(q), 6-(p)

Explanation : When benzene diazonium chloride reacts with phenol in which the phenol molecules at its para position is coupled with the diazonium salt to form p-hydroxyazobenzene. This reaction is known as coupling reaction. Methylated spirit is methyl alcohol. Power alcohol is a mixture of petrol and ethyl alcohol. The IUPAC name of glycerine is propane-1,2,3-triol and -OH bond is polar in nature. Absolute alcohol is 100% ethyl alcohol.

Q14. 

Ans. 

1. Hell-Volhard-Zelinsky

2. Aromatic acid

3. Reducing agent

4. White Vinegar

5. NH₂–CO–NH₂

6. Ethanoic anhydride

7. Formalin