Chemistry Test 80

Result

Chemistry Test 80

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

Stereoisomers have different :-

A
Molecular formula

B
Structural formula

C
Configuration

D
Molecular mass

Solution

Configuration (विन्यास)
Question 2
4 / -1

6 × 10^–3 mole K₂ Cr₂O₇ reacts completely with

9 × 10^–3 mole X⁺ⁿ to give XO^–3 and Cr⁺³. The value of n is:-

A
1

B
2

C
3

D
None of these

Solution

For complete reaction;(valency factor)_x^th

geq of K₂Cr₂O₇ = geq of X^th

or mole of K₂Cr₂O₇ × (valency h factor)_K2Cr2O7

= moles of X^th ×

6 × 10^–3 × 6 = (5–n)× 9 × 10^–3
Question 3
4 / -1

Air contains 79% N₂ and 21% O₂ by volume. If the total pressure is 750 mm of Hg. then the partial pressure of O₂ is–

A
157.2 mm of Hg

B
175.5 mm of Hg

C
315.0 mm of Hg

D
None of these
Question 4
4 / -1

X ml H₂ gas effuses through a hole in a container in 5 sec. The time taken for the effusion of the same volume of the gas specified below under identical conditions is

A
10 sec, He

B
20 sec, O₂

C
25 sec, CO

D
55 sec, CO₂