Class 12 Chemistry 2021 2nd Annual MCQs Test

ByWebsite Admin 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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Class 12 Chemistry
Paper 2021 2nd Annual
Practice MCQs Test

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

CH₃COOCH₃

CH₂CHO

CH₃COCH₃

CH₂COOH

2 / 17

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

Phosphorus

Calcium

Iron

Zinc

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

K₂Cr₂O₇ + H₂SO₄

Fe + H₂SO₄

NaBH₄ + H₂SO₄

LiAIH₄ + H₂SO₄

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

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

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

-CHO

-OCH₃

-NO₂

-COR

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7. Cannizzaro's reactions is given by:

Acetone

Formaldehyde

Propanol

Acetaldehyde

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

HC1 > HBr > HI

HI > HBr > HCI

HCI > Hl > HBr

HBr > Hl > HCI

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9. Polyethene is a/an:

Terpolymer

Condensation Polymer

Co Polymer

Addition polymer

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

N₂

SO₂

O₃

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11. Which one is a stronger acid?

CH₃COOH

CH₃CH₂COOH

HCOOH

CH₃CH₂CH₃COOH

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

n → σ*

σ → σ*

π → π*

π* → π

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13. Amides on reduction with LiAlH₄ are reduced to:

Secondary amines

Primary amines

Alcohols

Tertiary amines

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14. Benzene can show following reactions:

Addition Only

Neither Addition nor Substitution

Both Addition and Substitution

Substitution only

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15. IUPAC name of Isopropyl Alcohol is:

Methtyl-1-ethanol

Hydroxy Propane

2-Propanal

1-Propanol

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

[Cu (NH₃)₄(H₂O)₂]²⁺

[Cu (H₂O)₄(OH)₂]

|Cu (H₂O)₆]²⁺

[Cu (NH₃)₆]²⁺

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

R – F > R – Cl > R – Br > R – l

R – Cl > R – Br > R – I > R – F

R – I > R – Br > R – Cl > R – F

R – Br > R – Cl > R – F > R – l

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