JEE Main Test 116

Result

JEE Main Test 116

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Weekly Quiz Competition

Question 1
4 / -1

During the adsorption of krypton on activated charcoal at low temperature

A
∆H > 0 and ∆S < 0

B
∆H < 0 and ∆S < 0

C
∆H > 0 and ∆S > 0

D
∆H < 0 and ∆S > 0

Solution
Question 2
4 / -1

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

A
6.932 yr ^-1

B
0.6932 yr ^-1

C
0.06932 yr ^-1

D
0.006932 yr ^-1

Solution
Question 3
4 / -1

The colour of transition metal compound is due to

A
complete ns subshell

B
small size metal ions

C
incomplete (n -1)d -subshell

D
absorption of light in UV region

Solution

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
4 / -1

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

A
Groups 3, 4 and 5

B
Groups 5, 6 and 7

C
Groups 4, 5 and 6

D
Groups 7, 8 and 9

Solution

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
4 / -1

A
4

B
2

C
1

D
1/4

Solution
Question 6
4 / -1

Which one of the following is not correct ?

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

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

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

D

Solution
Question 7
4 / -1

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

A
0, ± 1

B
± 1

C
0

D
1

Solution
Question 8
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

A
one, tetrahedral

B
two, tetrahedral

C
one, square planar

D
two, square planar

Solution

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

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

A

B

C

D

Solution
Question 10
4 / -1

The slope of the normal of the curve

A
1/4

B
- (1/4)

C
4

D
-4

Solution