NEET Test 108

Result

NEET Test 108

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Weekly Quiz Competition

Question 1
4 / -1

Meiotic division of the secondary oocyte is completed:

A
Prior to ovulation

B
At the time of copulation

C
After zygote formation

D
At the time of fusion of a sperm with an ovum
Question 2
4 / -1

A millivoltmeter of 25 mV range is to be converted into an ammeter of 25 A range. The value (in ohm) of the necessary shunt will be:

A
0.001

B
0.01

C
1

D
0.05

Solution

The galvanometer is converted into an ammeter, by connecting a shunt, in parallel with it.
Question 3
4 / -1

The diagram given below is a vapour pressure composition diagram for a binary solution of A and B. In the solution, A-B interactions are:

A
Smaller than A-A and B-B interactions

B
Similar to A-A and B-B interactions

C
Greater than A-A and B-B interactions

D
Unpredictable

Solution

The vapour pressure of the solutions is almost equal to the vapour pressure of the initial A-A and B-B interactions.

Hence, there is no deviation, neither positive nor negative.

Therefore, A-B intersections are similar to the A-A and B-B interactions.

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

From the following pairs of ions which one is not an iso-electronic pair?

A

B

C

D

Solution

Iso-electronic species have some number of electrons.

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

In the circuit shown if the current for the diode is 20μA the potential difference across the diode is:

A
2V

B
4.5V

C
4V

D
2.5V

Solution

Since the diode is reversed biased, only drift current exists in the circuit which is 20μA.

Potential drop across 15Ω resistor = 15Ω × 20μA

= 300μV

= 0.0003V

Potential difference across the diode = 4 − 0.0003

= 3.99

= 4V

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

One mole of an organic compound (A) with the formula C₃H₈O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is-

A
Propan – 2 – ol

B
Propan- 1- ol

C
Ethoxy ethane

D
Methoxy ethane

Solution
Question 7
4 / -1

Which of the following is correct about viroids?

A
They have RNA with a protein coat

B
They have free RNA without a protein coat

C
They have DNA with a protein coat

D
They have free DNA without protein coat
Question 8
4 / -1

The amount of heat evolved when 500 cm³ of 0.1 M HCl is mixed with 200 ml of 0.2 M NaOH is:

A
1.292 kJ

B
2.292 kJ

C
3.35 kJ

D
0.092 kJ

Solution

500 cm³ of 0.1 M HCl correspond to 0.5 × 0.1 = 0.05 moles of hydrogen ions.

200 cm³ of 0.2 M NaOH corresponds to 0.2 × 0.2 = 0.04 moles of hydroxide ions.

NaOH is completely neutralized by HCl

The enthalpy of neutralization is 57.3 kJ/mol.

For 0.04 moles, the enthalpy of neutralization is

= 0.04 × 57.3

= 2.292 kJ

Hence, the correct option is (B).
Question 9
4 / -1

The rate of a first order reaction is concentration of the reactant. The half-life of the reaction is:

A
0.383 min

B
23.1 min

C
8.73 min

D
7.53 min

Solution
Question 10
4 / -1

In a coil of resistance 100Ω, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is:

A
250 Wb

B
275 Wb

C
200 Wb

D
225 Wb

Solution