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

Acetone and ethyl acetate

Benzene and CS₂

Benzene and acetone

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

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

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

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3. Identify carboxylic acid which is present in Vinegar:

Methanoic acid

Citric acid

Oxalic acid

Ethanoic acid

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

Ba(OH)₂

Ca(OH)₂

Sr(OH)₂

Mg(OH)₂

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

CH₂O

C₆H₆

C₂H₆O

C₂H₃3Cl

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

2-Butanol

1-Butanol

1- Propanol

2-Methyl-2- Propanol

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8. Quote the wave length range of IR region:

400-800µm

2.5-16µm

16-1000µm

0.8-2.5µm

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9. 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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10. Identify an element with higher ionization energy:

Greater metallic character

Larger atomic size

Strong reducing agent

Less electropositive

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11. 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

3,4-Dimethyl-3-hexene

3-methyl-3-hexene

2 Butene

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

Nitrogen dioxide

Carbon monoxide

Carbon dioxide

Sulphur dioxide

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13. RNA contains four different nitrogenous bases EXCEPT.

Cytosine

Thymine

Adenine

Guanine

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14. Cyclopropane is an example of:

Alicyclic compound

Aromatic compound

Heterocyclic compound

Acyclic compound

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

-4

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

Propanoic acid

Chloro-ethanoic acid

2-Methyl Propanoic acid

Ethanoic acid

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17. 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

Benzoic acid

Toluene

Xylene

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