JEE Main Test 121

Result

JEE Main Test 121

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

In the absence of intermolecular forces of attraction, the observed pressure p will be

A
p

B
< p

C
> p

D
zero

Solution

Pressure will be increases (>P). Because there will be no stickness (The mutual adhessiveness of cells) of molecules.
Question 2
4 / -1

The molecule having smallest bond angle is

A
NCl₃

B
AsCl₃

C
SbCl₃

D
PCl₃

Solution

Here,

NCl₃ → trigonal pyramidal →107⁰

ASCl₃→ trigonal pyramidal →109

SbCl₃ → pyramidal →97.20

PCl₃→ trigonal pyramidal → about 109.

Hence SbCl₃ has smaller bond angle is 97.2%.
Question 3
4 / -1

A
A is singular

B
|A| 0

C
A is symmetric

D
None of these

Solution
Question 4
4 / -1

Match the compounds in the column I with that in column II.

A
A = 1, B = 4, C = 3, D = 2, E = 5

B
A = 2, B = 4, C = 1, D = 3, E = 4

C
A = 3, B = 4, C = 1, D = 2, E = 4

D
A = 4, B = 4, C = 1, D = 2, E = 5

Solution
Question 5
4 / -1

A body is vibrating in simple harmonic motion. If its acceleration is 12 cms ^-2 at a displacement 3 cm, then time period is

A
6.28 s

B
3.14 s

C
1.57 s

D
2.57 s

Solution
Question 6
4 / -1

A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscillation is

A
3 HZ

B
2 HZ

C
4 HZ

D
1 HZ

Solution
Question 7
4 / -1

If cos x = tan y, cot y = tan z and cot z = tan x , then sin x is equal to

A

B

C

D

Solution
Question 8
4 / -1

A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below 1250 Hz. The velocity of sound in air is 340 m/s.

A
12

B
8

C
6

D
4

Solution
Question 9
4 / -1

An electron initially at rest falls a distance of 1.5 cm in a uniform electric field of magnitude 2 x 10⁴ N/C. The time taken by the electron to fall this distance is

A
1.3 × 10² s

B
2.1× 10^-12 s

C
1.6 × 10^-10 s

D
2.9 × 10^-9 s

Solution
Question 10
4 / -1

The electric field at the centroid of an equilateral triangle carrying an equal charge q at each of the vertices is

A
zero

B

C

D

Solution