Class 12 Chemistry Model Paper 2 MCQ Test

ByMuhammad Zaman June 26, 2022October 28, 2022

FBISE Federal Board Class 12 Chemistry Model Paper 2 MCQ Test. Do as much practice as you can so that you get good marks in the final exams.

Chemistry Model Paper 2 MCQs Test

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Class 12 Chemistry
Model Paper 2
Practice MCQs Test

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1. Identify a mixture of two organic solvents that are used in nail polish remover.

Ethyl acetate and CS₂

Benzene and CS₂

Acetone and ethyl acetate

Benzene and acetone

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2. Identify which one of the following has the highest boiling point:

1-Butanol

1- Propanol

2-Methyl-2- Propanol

2-Butanol

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3. Identify carboxylic acid which is present in Vinegar:

Oxalic acid

Methanoic acid

Ethanoic acid

Citric acid

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4. Predict the color change when a base is added into potassium dichromate solution:

Yellow to orange

Green to yellow

Yellow to blue

Orange to yellow

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5. Cyclopropane is an example of:

Heterocyclic compound

Aromatic compound

Acyclic compound

Alicyclic compound

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6. Identify an element with higher ionization energy:

Less electropositive

Larger atomic size

Strong reducing agent

Greater metallic character

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7. RNA contains four different nitrogenous bases EXCEPT.

Thymine

Guanine

Adenine

Cytosine

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8. Predict which one of the following compounds is a monomer of an addition polymer.

C₂H₃3Cl

C₆H₆

CH₂O

C₂H₆O

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9. Propose which one of the following reactions is more likely to occur through SN1 mechanism?

[katex](CH_3)_2CH − Cl \xrightarrow[]{CCl_4/NaOH} (CH_2)_2 CH − OH[/katex]

[katex]C_2H_5Cl \xrightarrow[]{NaOH/H_2O} C_2H_5 − OH[/katex]

[katex](CH_3)_3 CCl \xrightarrow[]{NaOH/H_2O} (CH_3)_3C − OH[/katex]

[katex](CH_3)_3C − Cl \xrightarrow[]{CCl_4/NaOH} (CH_3)_3COH[/katex]

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10. Predict the coordination number in [Pt (OH)₂ (NH₃)₄] SO₄.

-4

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11. Prioritize the highest acidity of carboxylic acid in the following:

Chloro-ethanoic acid

2-Methyl Propanoic acid

Ethanoic acid

Propanoic acid

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12. Predict which one of the following metal hydroxide is least soluble in water?

Ba(OH)₂

Mg(OH)₂

Ca(OH)₂

Sr(OH)₂

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13. Name which one of the following gas is not a pollutant?

Carbon dioxide

Sulphur dioxide

Nitrogen dioxide

Carbon monoxide

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14. Quote the wave length range of IR region:

16-1000µm

400-800µm

2.5-16µm

0.8-2.5µm

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15. An aldehyde when strongly heated with Fehling’s reagent gives red precipitate. What property of an aldehyde is observed in this reaction?

Redox property

Reducing property

Neutralizing ability

Oxidizing property

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16. Identify the product Y in the following scheme:

\( C_6H_6+CH_3Cl \xrightarrow[]{AlCl_3} X \xrightarrow[]{KMnO_4 / H_2SO_4} Y \)

Acetophenone

Toluene

Xylene

Benzoic acid

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17. When ozone is treated with an alkene, aldehyde and ketone are produced, identify which one of the following will produce two moles of butanone?

2 – Hexene

3-methyl-3-hexene

2 Butene

3,4-Dimethyl-3-hexene

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