JEE Main Test 116

Result

JEE Main Test 116

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Score
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Time Taken: -

Question 1/10
4 / -1

During the adsorption of krypton on activated charcoal at low temperature

Correct

Wrong

Skipped
A
∆H > 0 and ∆S < 0

Correct

Wrong

Skipped
B
∆H < 0 and ∆S < 0

Correct

Wrong

Skipped
C
∆H > 0 and ∆S > 0

Correct

Wrong

Skipped
D
∆H < 0 and ∆S > 0

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Solutions
Question 2/10
4 / -1

If the half-life of an isotope X is 10 yr, its decay constant is

Correct

Wrong

Skipped
A
6.932 yr ^-1

Correct

Wrong

Skipped
B
0.6932 yr ^-1

Correct

Wrong

Skipped
C
0.06932 yr ^-1

Correct

Wrong

Skipped
D
0.006932 yr ^-1

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Solutions
Question 3/10
4 / -1

The colour of transition metal compound is due to

Correct

Wrong

Skipped
A
complete ns subshell

Correct

Wrong

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B
small size metal ions

Correct

Wrong

Skipped
C
incomplete (n -1)d -subshell

Correct

Wrong

Skipped
D
absorption of light in UV region

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Solutions

Usually the color of transition metal compound is due to d-d transition. When the d-level is not completely filled , it is possible to promote electron from a lower energy d-orbital to higher energy d-orbital by absorption of a photon of electromagnetic radiation having an appropriate energy.

Hence on the otherhand we can say that the color of tranistion metal is due to imcomplete (n-1) d- subshell.
Question 4/10
4 / -1

'Hydride gap' is referred to which region of the periodic table ?

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A
Groups 3, 4 and 5

Correct

Wrong

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B
Groups 5, 6 and 7

Correct

Wrong

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C
Groups 4, 5 and 6

Correct

Wrong

Skipped
D
Groups 7, 8 and 9

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Solutions

Metallic or Interstitial hydrides are formed by many d-block and f-block elements when heated with hydrogen under pressure. The hydrides tend to be non-stoichiometric and they may be of variable composition. There is a hydride gap where elements do not form hydrides.

Hence the metals of 7^th , 8^th and 9^th groups in the periodic table do not form hydrides and this region of periodic table is referred to as the hydride gap.
Question 5/10
4 / -1

Correct

Wrong

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A
4

Correct

Wrong

Skipped
B
2

Correct

Wrong

Skipped
C
1

Correct

Wrong

Skipped
D
1/4

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Solutions
Question 6/10
4 / -1

Which one of the following is not correct ?

Correct

Wrong

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A
If f(x) is not continuous at x = a, then it is not differentiable at x = a

Correct

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B
If f(x) is continuous at x = a, then it is differentiable at x = a

Correct

Wrong

Skipped
C
If f(x) and g(x) are differentiable at x = a, then f(x) + g(x) is also differentiable at x = a

Correct

Wrong

Skipped
D

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Solutions
Question 7/10
4 / -1

If f(x) = ||x|- 1|, then points, where f(x) is not differentiable, is/(are)

Correct

Wrong

Skipped
A
0, ± 1

Correct

Wrong

Skipped
B
± 1

Correct

Wrong

Skipped
C
0

Correct

Wrong

Skipped
D
1

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Solutions
Question 8/10
4 / -1

Nickel (Z = 28) combines with a uninegative monodentate ligand X ^- to form a paramagnetic complex [NiX₄]^2- . The number of unpaired electron(s) in the nickel and geometry of this complex ion are respectively

Correct

Wrong

Skipped
A
one, tetrahedral

Correct

Wrong

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B
two, tetrahedral

Correct

Wrong

Skipped
C
one, square planar

Correct

Wrong

Skipped
D
two, square planar

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Solutions

Hence Nickel has 2 unpaired electrons and the geometry of the complex [Ni X₄ ]^2- is tetrahedral due to SP³ hybridization.
Question 9/10
4 / -1

In the reaction shown below, the major product(s) formed is/are

Correct

Wrong

Skipped
A

Correct

Wrong

Skipped
B

Correct

Wrong

Skipped
C

Correct

Wrong

Skipped
D

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Solutions
Question 10/10
4 / -1

The slope of the normal of the curve

Correct

Wrong

Skipped
A
1/4

Correct

Wrong

Skipped
B
- (1/4)

Correct

Wrong

Skipped
C
4

Correct

Wrong

Skipped
D
-4

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Solutions

Question 1/10

∆H > 0 and ∆S < 0

∆H < 0 and ∆S < 0

∆H > 0 and ∆S > 0

∆H < 0 and ∆S > 0

Question 2/10

6.932 yr -1

0.6932 yr -1

0.06932 yr -1

0.006932 yr -1

Question 3/10

complete ns subshell

small size metal ions

incomplete (n -1)d -subshell

absorption of light in UV region

Question 4/10

Groups 3, 4 and 5

Groups 5, 6 and 7

Groups 4, 5 and 6

Groups 7, 8 and 9

Question 5/10

4

2

1

1/4

Question 6/10

If f(x) is not continuous at x = a, then it is not differentiable at x = a

If f(x) is continuous at x = a, then it is differentiable at x = a

If f(x) and g(x) are differentiable at x = a, then f(x) + g(x) is also differentiable at x = a

Question 7/10

0, ± 1

± 1

0

1

Question 8/10

one, tetrahedral

two, tetrahedral

one, square planar

two, square planar

Question 9/10

Question 10/10

1/4

- (1/4)

4

-4

6.932 yr ^-1

0.6932 yr ^-1

0.06932 yr ^-1

0.006932 yr ^-1