NEET Test 80

Result

NEET Test 80

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Weekly Quiz Competition

Question 1
4 / -1

An athlete throws a discus from rest to a final angular velocity of 15 rad/s in 0.270 s before releasing it. During acceleration, the discus moves a circular arc of radius 0.810 m. The acceleration of the discus before it is released is ___ ms⁻².

A
45

B
182

C
187

D
192

Solution

ω=ω0+αt

⇒ω=0+αt

⇒α=15/0.270rad/s2

Now, a=r,α=0.81×15/0.270=45ms−2

Hence, the correct option is (A).
Question 2
4 / -1

A radio transmitter operates at a frequency 880kHz and a power of 10kW. The number of photons emitted per second is:

A
1.71 × 10³¹

B
1.327 × 10²⁵

C
1.327 × 10³⁷

D
1.327 × 10⁴⁵

Solution

Power of transmitter,

P=10kW

=10×10³W

Frequency of the transmitter,

v=880kHz

=880×10³ Hz

Number of photons emitted per second

N = P/hv = 10×10³/ 6.6×10⁻³⁴×880×10³

N=1.71×10³¹ photons emitted per second.

Hence, the correct option is (A).
Question 3
4 / -1

Protosteles are found in

A
Bryophyta

B
Gymnosperms

C
Pteridophyta

D
Angiosperms

Solution

Protosteles are the most complex type of stellar organization among all pteridophytes. They are solid steel with most origins, having a phloem-enclosed central xylem core. In their rhizome, stem or roots, most of the pteridophytes exhibit protostelic character.

Hence, the correct option is (C).
Question 4
4 / -1

Which of the following gates serve as building blocks in digital circuits?

A
OR and AND gates

B
AND and NOT gates

C
OR and NOT gates

D
NAND and NOR gates

Solution

NAND and NOR gates are known as universal gates. Any one of these gates can be used to implement any kind of logic gate. This kind of feasibility does not exist with other gates i.e. any other gate cannot solely implement all logic gates. For example, AND gate cannot be implemented using an OR gate and vice-versa. The implementation of NAND and NOR gates to generate other logic gates is shown above.

Hence, the correct option is (D).
Question 5
4 / -1

Intermediate product of hydrolysis of cyanide is:

A
RCOONH₄

B
RCONH₂

C

D

Solution

Intermediate product of hydrolysis of cyanide is RCONH₂ as shown in below given reaction:

Hence, the correct option is (B).
Question 6
4 / -1

Signals for parturition originate from:

A
Fully developed foetus only

B
Placenta only

C
Oxytocin released by maternal pituitary

D
Both A and B

Solution

Parturition is an induced Complex neuroendocrine mechanism. In this signals are originated from a fully developed fetus and placenta. This leads to mild uterine contractions and hence fetal ejection reflex. Then oxytocin is released from the maternal pituitary and it acts on uterine muscles leading to strong uterine contractions. This further continues to stronger and stronger contractions. As a result, the baby is expelled out of the uterus with the placenta through the birth canal.

Hence, the correct option is (D).
Question 7
4 / -1

A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has a frequency 2f. If v is the velocity of sound, The velocity of the car in the same velocity units will be

A
v/√2

B
v/3

C
v/4

D
v/2

Solution
Question 8
4 / -1

Two similar coils are kept mutually perpendicular such that their centres coincide. Find the ratio of the magnetic field due to one coil and the resultant magnetic field through both the coils if the same current is passed.

A
1 : √2

B
1 : 2

C
2 : 1

D
√3 : 1

Solution
Question 9
4 / -1

A person suffering from severe chills and recurring high fever for 3−4 days was diagnosed with malaria. The causative agent is responsible for the secretion of a toxic substance, which ruptures RBCs. This substance is called.

A
Sporozoites

B
Haematopoetin

C
Haem-protease

D
Haemozoin

Solution

Plasmodium enters the human body as sporozoites (infectious form) through the bite of infected female Anopheles mosquito. The parasites initially multiply within the liver cells and then attack the red blood cells RBCs resulting in their rupture. The rupture of RBCs is associated with the release of a toxic substance, haemozoin, which is responsible for the chill and high fever recurring every three to four days.

Hence, the correct option is (D).
Question 10
4 / -1

Sodium has body-centered packing. The distance between two nearest atoms is 3.7 A^∘. The lattice parameter is:

A
8.6 A^o

B
6.8 A^o

C
4.3 A^o

D
3.0 A^o

Solution

Let a be the lattice parameter, and r be the radius of one atom.

Since, structure is of BCC type,

We know that,

4r=√3a

The value of 2r has been given to be equal to 3.7 A^o

So, 2×3.7=a√3

⇒a=4.3 A^o

Hence, the correct option is (C).

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Re-Attempt Weekly Quiz Competition

NEET Test 80

Result

NEET Test 80

Score

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Rank

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SHARING IS CARING

Question 1

45

182

187

192

Solution

Question 2

1.71 × 1031

1.327 × 1025

1.327 × 1037

1.327 × 1045

Solution

Question 3

Bryophyta

Gymnosperms

Pteridophyta

Angiosperms

Solution

Question 4

OR and AND gates

AND and NOT gates

OR and NOT gates

NAND and NOR gates

Solution

Question 5

RCOONH4

RCONH2

Solution

Question 6

Fully developed foetus only

Placenta only

Oxytocin released by maternal pituitary

Both A and B

Solution

Question 7

v/√2

v/3

v/4

v/2

Solution

Question 8

1 : √2

1 : 2

2 : 1

√3 : 1

Solution

Question 9

Sporozoites

Haematopoetin

Haem-protease

Haemozoin

Solution

Question 10

8.6 Ao

6.8 Ao

4.3 Ao

3.0 Ao

Solution

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1.71 × 10³¹

1.327 × 10²⁵

1.327 × 10³⁷

1.327 × 10⁴⁵

RCOONH₄

RCONH₂

8.6 A^o

6.8 A^o

4.3 A^o

3.0 A^o