Class 12 Chemistry 2021 2nd Annual MCQs Test

ByMuhammad Zaman June 27, 2022October 28, 2022

FBISE Federal Board Class 12 Chemistry 2021 2nd Annual MCQs Test. Do as much practice as you can so that you get good marks in the final exams.

Class 12 Chemistry MCQs Tests

2nd Annual 2021 MCQs Test

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440

Class 12 Chemistry
Paper 2021 2nd Annual
Practice MCQs Test

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1. Alcohol are easily oxidized to different products by using:

Fe + H₂SO₄

LiAIH₄ + H₂SO₄

K₂Cr₂O₇ + H₂SO₄

NaBH₄ + H₂SO₄

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2. Benzene can show following reactions:

Neither Addition nor Substitution

Both Addition and Substitution

Addition Only

Substitution only

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3. IUPAC name of Isopropyl Alcohol is:

Methtyl-1-ethanol

Hydroxy Propane

1-Propanol

2-Propanal

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4. When excess of aqueous ammonia is added to hexaqua Copper (II) ion it acts as ligand and formula of complex formed is:

|Cu (H₂O)₆]²⁺

[Cu (NH₃)₄(H₂O)₂]²⁺

[Cu (NH₃)₆]²⁺

[Cu (H₂O)₄(OH)₂]

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5. Which transition does not lie in the range of U-V visible spectroscopy?

π → π*

π* → π

σ → σ*

n → σ*

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6. Which one of the following is a non-typical transition element?

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7. For Hydrohalogenation of alkenes. The order of reactivity of halogen acid is:

HCI > Hl > HBr

HI > HBr > HCI

HBr > Hl > HCI

HC1 > HBr > HI

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8. Which of the following contains ester as a functional group?

CH₂COOH

CH₂CHO

CH₃COOCH₃

CH₃COCH₃

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9. Which one of the following is an example of ortho and para directing group?

-NO₂

-CHO

-COR

-OCH₃

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10. Which one is a stronger acid?

CH₃COOH

CH₃CH₂COOH

CH₃CH₂CH₃COOH

HCOOH

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11. Which one of the following metals does not react directly with water?

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12. Cannizzaro's reactions is given by:

Propanol

Acetone

Formaldehyde

Acetaldehyde

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13. Rain water becomes acidic due to the absorption of the following gas:

N₂

O₃

SO₂

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14. Amides on reduction with LiAlH₄ are reduced to:

Secondary amines

Tertiary amines

Alcohols

Primary amines

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15. More than a hundred specific enzymes required mineral for the catalytic function.

Zinc

Calcium

Phosphorus

Iron

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16. Polyethene is a/an:

Terpolymer

Addition polymer

Co Polymer

Condensation Polymer

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17. On the basis of bond polarity, reactivity of alkyl halides decreases in the following order:

R – Br > R – Cl > R – F > R – l

R – I > R – Br > R – Cl > R – F

R – Cl > R – Br > R – I > R – F

R – F > R – Cl > R – Br > R – l

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