JEE Main Test 94

Result

JEE Main Test 94

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

When a disc is rotating with angular velocity ω, a particle situated at a distance of 4 cm just begins to slip. If the angular velocity is doubled, at what distance will the particle start to slip?

A
1 cm

B
2 cm

C
3 cm

D
4 cm

Solution
Question 2
4 / -1

For AB bond, if per cent ionic character is plotted against electronegativity difference (X_A - X_B ) , the shape of the curve would look like

The correct curve is

A
A

B
B

C
C

D
D

Solution

Percent ionic character of a covalent bond depending on the electronegativity difference.

∴ Percentage ionic character = 16(X_A – X_B) + 3.5(X_A – X_B)²

Where X_A and X_B are electronegativities of atoms A and B respectively.

Hence percent ionic character is directly proportional to (X_A – X_B). Therefore as (X_A – X_B) increases, percent ionic character will also increase. Therefore the curve C is the correct shape for AB bond.
Question 3
4 / -1

NH₃ and BF₃ form an adduct readily because they form

A
a coordinate bond

B
a hydrogen bond

C
an ionic bond

D
a covalent bond

Solution

BF₃ acts as Lewis acid and NH₃ acts as Lewis base. Hence NH₃ forms an adduct readily with BF₃ through coordinate bonding_.
Question 4
4 / -1

A force F= 2.0 N acts on a particle P in the x – z plane. The force F is parallel to x-axis. The particle P (as shown in the figure) is at a distance 3 m and the line joining P with the origin makes angle 30° with the x-axis. The magnitude of torque on P w.r.t. origin O (in N–m) is

A
2

B
3

C
4

D
5

Solution
Question 5
4 / -1

Strongest hydrogen bond is shown by

A
Water

B
Ammonia

C
Hydrogen fluoride

D
Hydrogen sulphide.

Solution
Question 6
4 / -1

If A and B are square matrices of size n × n such that A² – B² = (A – B)(A + B), then which of the following will be always correct ?

A
AB = BA

B
either A or B is a zero matrix

C
either A or B is an identity matrix

D
A = B

Solution
Question 7
4 / -1

It is seen that in proper ventilation of building, windows must be opened near the bottom and the top of the walls, so as to let pass

A
in hot near the roof and cool air out near the bottom

B
out hot air near the roof

C
in cool air near the bottom and hot air out near the roof

D
in more air

Solution

Windows to be opened near the bottom and top of the walls. So as to let pass excess of moisture and pollutants out near the roof and fresh air inside the room through the door.

Hot air being lighter rises up and leaves the room and fresh air comes into the room through doors
Question 8
4 / -1

Which of the following has maximum number of lone pairs associated with Xe ?

A
XeO₃

B
XeF₄

C
XeF₆

D
XeF₂

Solution
Question 9
4 / -1

A particle executes simple harmonic motion between x = –A and x = +A. The time taken for it to go from 0 to A/2 is T₁ and to go from A/2 to A is T₂. Then,

A
T₁ < T₂

B
T₁ > T₂

C
T₁ = T₂

D
T₁ = 2T₂

Solution

In S.H.M the time taken for the particle to go from 0 to A/2 is T₁will be less than time taken to go A/2 A T₁< T₂
Question 10
4 / -1

Consider the system of equations in χ, y and z as χsin 3θ - y + z = 0, χ cos 2θ + 4y + 3z = 0, 2χ + 7y + 7z = 0 and If the system has a non - trivial solution, then for integer n, values of θ are given by

A

B

C

D

Solution