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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Class 12 Chemistry
Paper 2021 2nd Annual
Practice MCQs Test

1 / 17

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

Zinc

Calcium

Phosphorus

Iron

2 / 17

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

-NO₂

-CHO

-OCH₃

-COR

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

CH₃COCH₃

CH₂CHO

CH₃COOCH₃

CH₂COOH

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

HBr > Hl > HCI

HI > HBr > HCI

HCI > Hl > HBr

HC1 > HBr > HI

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5. Which one is a stronger acid?

CH₃COOH

HCOOH

CH₃CH₂CH₃COOH

CH₃CH₂COOH

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6. 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 (NH₃)₆]²⁺

|Cu (H₂O)₆]²⁺

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

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

K₂Cr₂O₇ + H₂SO₄

NaBH₄ + H₂SO₄

Fe + H₂SO₄

LiAIH₄ + H₂SO₄

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

R – Br > R – Cl > R – F > R – l

R – Cl > R – Br > R – I > R – F

R – F > R – Cl > R – Br > R – l

R – I > R – Br > R – Cl > R – F

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10. Benzene can show following reactions:

Neither Addition nor Substitution

Both Addition and Substitution

Addition Only

Substitution only

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

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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. Cannizzaro's reactions is given by:

Acetone

Acetaldehyde

Propanol

Formaldehyde

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14. Polyethene is a/an:

Condensation Polymer

Terpolymer

Addition polymer

Co Polymer

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

SO₂

N₂

O₃

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16. IUPAC name of Isopropyl Alcohol is:

2-Propanal

1-Propanol

Methtyl-1-ethanol

Hydroxy Propane

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17. Amides on reduction with LiAlH₄ are reduced to:

Alcohols

Tertiary amines

Secondary amines

Primary amines

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