Erudite december 2021 jamb mock(CHEMISTRY) | Study Mode

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Question 1

What is the shape of a molecule of CCl₄?

Pyramid

tetrahedral

Trigonal planar

linear

Explanation

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Correct option: B

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Question 2

A sample of gas with an initial volume of 2.5 dm³ is heated and then allowed to expand to 7.5 dm³ at constant at pressure. What is the ratio of the final temperature of the initial absolute temperature?

3:1

1:3

2:5

5:2

Explanation

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Correct option: A

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Question 3

6g of Mg was to 100cm³ of 1 moldm³ H₂ SO₄ . What mass of Mg remained undissolved? (Mg = 24)

0.24g

2.4g

3.6g

0.36g

Explanation

Explanation not provided, please join discuss, your contributions are welcomed

Correct option: B

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Question 4

Which of the following will act as both oxidizing agents and reducing agents?

H₂ S

NH₃

Cl₂

SO₂

Explanation

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Correct option: D

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Question 5

A metal which can be used as sacrificial anode for preventing corrosion of length of iron pipe is

copper

magnesium

silver

lead

Explanation

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Correct option: C

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Question 6

Which of the following increases as boiling water changes to steam?

Temperature of the system

degree of disorder of the system

number of molecule

Activation energy

Explanation

Explanation not provided, please join discuss, your contributions are welcomed

Correct option: B

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Question 7

Which of the following is stable to heat

NaHCO₃

( NH₄ )₂ SO₄

Ag NH₃

K₂ CO₃

Explanation

Explanation not provided, please join discuss, your contributions are welcomed

Correct option: D

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Question 8

Which of the following will precipitate in dil. HCl

ZnS

Na₂ S

Fe S

CuS

Explanation

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Correct option: D

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Question 9

Which of the following does NOT contain aluminum as a component?

Over-head cables

Duralumin

Container for caustic soda

Container for trioxonitrate (v) acid

Explanation

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Correct option: C

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Question 10

The removal of rust from iron by treatment with tetraoxosulphate (vi) acid is based on the

Hydrolysis of the iron

Reaction of acid with base

Oxidation of the rust

Dehydration of the iron

Explanation

Explanation not provided, please join discuss, your contributions are welcomed

Correct option: D

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Erudite december 2021 jamb mock(CHEMISTRY) | Study Mode

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