Chemistry Test 134

Result

Chemistry Test 134

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Reduction potential of following electrode Pt, H₂ (4atm) | H₂SO₄ (0.01M) is-

A
0.118

B
–0.118

C
0.059

D
–0.059

Solution
Question 2
4 / -1

If molecular weight of As₂S₃ is M. Then in the following reaction As₂S₃ + 7NaClO₃ + 12NaOH → 2Na₃AsO₄ + 7NaClO + 3Na₂SO₄ + 6H₂O. the equivalent weight of As₂S₃ is

A
M/24

B
M

C
M/26

D
M/28

Solution

Both As and S go under oxidation
As₂S₃→ AsO₄^3(–) + 4e^(–) (oxidation of As)
As₂S₃→ 3SO₄^2(–) + 24e^(–) (oxidation of S)
Total electrons = 24 × 4 = 28 = n-factor
Question 3
4 / -1

Which will give only one product (excluding stereoisomer) when undergoing E₂ reaction ?

A

B

C

D

Solution

Which are identical product
Question 4
4 / -1

Assume that a particular amino acid has isoelectric point as 6.0. In a solution at P_H 1.0 which of the following will predominate

A

B

C

D

Solution

In acidic medium z witter ion
Question 5
4 / -1

C – 2 and C – 3 configuration of

is -

A
2R, 3S

B
2S, 3R

C
2S, 3S

D
2R, 3R

Solution

According to CIP rule
Clockwise is R configuration and Anti-clockwise is S configuration
Question 6
4 / -1

End product in the reaction is,

A

B

C

D

Solution

Step 1.

Acid base reaction

Step 2.
Question 7
4 / -1

Which of the following does not occur in Bessemer’s converter

A
2Cu₂S + 5O₂→2CuSO₄ + 2CuO

B
2Cu₂S + 3O₂→2Cu₂O + 2SO₂

C
2CuFeS₂ + O₂→Cu₂S+ 2FeS + SO₂

D
FeO + SiO₂→FeSiO₃

Solution

n Bessemer’s converter
2CuFeS₂ + O₂→Cu₂S + 2 FeS + SO₂ does not take place
Question 8
4 / -1

For reaction CO(g) + NO₂(g) CO₂(g) +NO(g) Energy profile diagram is given below.

What is the 'activation energy' of the reaction?

A
x

B
y

C
x + y

D
x - y

Solution

Activation energy is energy from reactant to highest energy barrier
So activation energy is ‘x’ hence A option is correct
Question 9
4 / -1

Which of the following is buffer-

A
H₃PO₃ + Na₃PO₃

B
HCl + CH₃COOH

C

D
HCl + NH₄OH

Solution

Buffer is conjugate acid and salt of conjugate base pair.
Question 10
4 / -1

Nitrogen dioxide cannot be obtained from

A
Cu(NO₃)₂

B
Hg(NO₃)₂

C
NaNO₃

D
AgNO₃

Solution