Chemistry Test

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Chemistry Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Dimerisation in carboxylic acid is due to

A
ionic bond

B
covalent bond

C
coordinate bond

D
intermolecular hydrogen bond
Question 2
1 / -0

The compound which reacts with Fehling solution is

A
C₆H₅COOH

B
HCOOH

C
CH₃COCH₃

D
CH₂Cl - CH₂Cl
Question 3
1 / -0

Which of the following gives blood red colour with KCNS ?

A
Cu^2⁺

B
Fe^3⁺

C
Al^3⁺

D
Zn^2⁺
Question 4
1 / -0

A cylinder filled with a movable piston contains liquid water in equilibrium with water vapour at 25^oC. Which one of the following operations results in a decreace in the equilibrium vapour pressure ?

A
Moving the piston downward a short distance

B
Removing a small amount of vapour

C
Removing a small amount of the liquid water

D
Dissolving salt in the water
Question 5
1 / -0

The internal energy of a subtance does not depend upon

A
rotational energy

B
vibrational energy

C
translational energy

D
energy due to gravitational pull
Question 6
1 / -0

The reaction is spontaneous if the cell potential is

A
Positive

B
Negative

C
Zero

D
Infinite
Question 7
1 / -0

2-acetoxy benzoic acid is used as an

A
antiseptic

B
antipyretic

C
antimalarial

D
antidepressant
Question 8
1 / -0

Which one of the following is an example of exothermic reaction?

A
H₂ (g) + Cl₂ (g) → 2HCl(g) ΔH = − 184. 6 kJ

B
N₂₍g) + O₂(g) → 2NO(g) ,ΔH = + 180.8 k J

C
C(graphite)+ H₂O(g) → CO(g) + H₂ (g) − 131.4 kJ

D
C(graphite)+ 2S(s) + 91.9 kJ → CS₂(l)
Question 9
1 / -0

In the silver plating of copper, K[Ag(CN)_₂] is used insead of AgNO₃. The reason is

A
A thin layer of Ag is formed on Cu

B
More voltage is required

C
Ag⁺ ions are completely removed from solution

D
Less availablity of Ag⁺ ions, as Cu cannot displace Ag from [Ag(CN)₂]⁻ ion.
Question 10
1 / -0

Which of the following simple ions will not form complex ion with NH₃?

A
Pb²⁺

B
Ag²⁺

C
Cd²⁺

D
Cu²⁺

Solution

Solution

Pb2+ ion do not form complex with ammonia. It precipitate in form of a white salt rather than forming complex.Hence, correct answer is A.

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Chemistry Test - 2

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Chemistry Test - 2

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Question 1

ionic bond

covalent bond

coordinate bond

intermolecular hydrogen bond

Question 2

C₆H₅COOH

HCOOH

CH₃COCH₃

CH₂Cl - CH₂Cl

Question 3

Cu2⁺

Fe3⁺

Al3⁺

Zn2⁺

Question 4

Moving the piston downward a short distance

Removing a small amount of vapour

Removing a small amount of the liquid water

Dissolving salt in the water

Question 5

rotational energy

vibrational energy

translational energy

energy due to gravitational pull

Question 6

Positive

Negative

Zero

Infinite

Question 7

antiseptic

antipyretic

antimalarial

antidepressant

Question 8

H2 (g) + Cl2 (g) → 2HCl(g) ΔH = − 184. 6 kJ

N2(g) + O2(g) → 2NO(g) ,ΔH = + 180.8 k J

C(graphite)+ H2O(g) → CO(g) + H2 (g) − 131.4 kJ

C(graphite)+ 2S(s) + 91.9 kJ → CS2(l)

Question 9

A thin layer of Ag is formed on Cu

More voltage is required

Ag⁺ ions are completely removed from solution

Less availablity of Ag⁺ ions, as Cu cannot displace Ag from [Ag(CN)₂]⁻ ion.

Question 10

Pb2+

Ag2+

Cd2+

Cu2+

Solution

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Cu^2⁺

Fe^3⁺

Al^3⁺

Zn^2⁺

H₂ (g) + Cl₂ (g) → 2HCl(g) ΔH = − 184. 6 kJ

N₂₍g) + O₂(g) → 2NO(g) ,ΔH = + 180.8 k J

C(graphite)+ H₂O(g) → CO(g) + H₂ (g) − 131.4 kJ

C(graphite)+ 2S(s) + 91.9 kJ → CS₂(l)

Pb²⁺

Ag²⁺

Cd²⁺

Cu²⁺