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Test: CSIR-NET Chemical Sciences Mock Test - 1 - CSIR NET Chemical Science MCQ


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30 Questions MCQ Test CSIR-UGC (NET) Chemical Science Mock Test Series 2024 - Test: CSIR-NET Chemical Sciences Mock Test - 1

Test: CSIR-NET Chemical Sciences Mock Test - 1 for CSIR NET Chemical Science 2024 is part of CSIR-UGC (NET) Chemical Science Mock Test Series 2024 preparation. The Test: CSIR-NET Chemical Sciences Mock Test - 1 questions and answers have been prepared according to the CSIR NET Chemical Science exam syllabus.The Test: CSIR-NET Chemical Sciences Mock Test - 1 MCQs are made for CSIR NET Chemical Science 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: CSIR-NET Chemical Sciences Mock Test - 1 below.
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Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 1

Gaurav spends 30% of his monthly income on food articles, 40% of the remaining on conveyance and clothes and saves 50% of the remaining. If his monthly salary is Rs. 18,400, how much money does he save every month ?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 1

Saving  = 50% of (100 - 40)% of (100 - 30)% of Rs. 18,400 = Rs. (50/100 * 60/100 * 70/100 * 18400) = Rs. 3864.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 2

A shopkeeper cheats to the extent of 10% while buying and selling, by using false weights. His total gain is.

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 2


= 21%

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Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 3

The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 3

Required number = H.C.F. of (1657 - 6) and (2037 - 5)
= H.C.F. of 1651 and 2032 = 127.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 4

If log 2 = 0.3010 and log 3 = 0.4771, the values of log5 512 is

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 4

 

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 5

A, B and C can do a piece of work in 24 days, 30 days and 40 days respectively. They began the work together but C left 4 days before the completion of the work. In how many days was the work completed?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 5

One day's work of A, B and C = (1/24 + 1/30 + 1/40) = 1/10.
C leaves 4 days before completion of the work, which means only A and B work during the last 4 days.
Work done by A and B together in the last 4 days = 4 (1/24 + 1/30) = 3/10.
Remaining Work = 7/10, which was done by A,B and C in the initial number of days. 
Number of days required for this initial work = 7 days. 
Thus, the total numbers of days required = 4 + 7 = 11 days.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 6

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 6

Total weight increased = (8 x 2.5) kg = 20 kg.
Weight of new person = (65 + 20) kg = 85 kg.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 7

A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 7

Let S be the sample space. Then, n(S)= number of ways of drawing 3 balls out of 
Let E= event of getting all the 3 red balls. 

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 8

If two dice are thrown, then the probability that at least one of the dice shows a number less than 5 is:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 8

We need to find the probability that at least one dice shows a number less than 5.
P1 = 1 – Probability that none of the dice shows the number that is less than 5
P = probability that both dice does not have less than 5 that is can have 5 or 6

= 8/9

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 9

In an exam, there were 5 questions. 10% of students solved all questions, 10% did not solve any question and 15% of the remaining students solved 1 question and 16% of total students solved 4 questions. If 24% of total students solved 2 questions and 140 students solved 3 questions, find the total number of students. 

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 9

Given:
In an exam, there were 5 questions. 10% of students solved all questions, 10% did not solve any question and 15% of the remaining students solved 1 question and 16% of total students solved 4 questions 24% of students solved 2 questions and 140 students solved 3 questions.
Calculation:
Let the total number of students be x.
10% of students solved all questions, 10% did not solve any question.
Number of students who solved all questions = 10% of x = 0.10x
Number of students who solved 0 question = 10% of x = 0.10x
15% of the remaining solved single question.
Remaining students = x – 0.10x – 0.10x = 0.80x = 4x/5
Number of students who solved 1 question = 15% of 4x/5 = 3x/25
Number of students who solved 4 questions = 16% of x = 0.16x = 4x/25
Number of students who solved 2 questions = 24% of x = 0.24x = 6x/25
Number of students who solved 3 questions = 140
Total number of students = Number of students who solved 0 question + Number of students who solved 1 question + Number of students who solved 2 questions + Number of students who solved 3 questions + Number of students who solved 4 questions + Number of students who solved all questions
⇒ x = x/10 + 3x/25 + 6x/25 + 140 + 4x/25 + x/10
⇒ x = 18x/25 + 140
⇒ x – 18x/25 = 140
⇒ 7x/25 = 140
⇒ x = 500 students
∴ Total students are equal to 500.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 10


In the given figure, PQR is a triangle in which angle P : angle Q : angle R = 3 : 2 : 1, and PR is perpendicular to RS. What will be the measure of angle TRS?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 10

Given data:

∠P : ∠Q : ∠R = 3 : 2 : 1
PR ⊥ RS
⇒ ∠PRS = 90°
Concept used:
The sum of all angles of a triangle is 180°.
Exterior angle = Sum of remaining two interior angles
⇒ ∠PRT = ∠QPR + ∠PQR
Calculation:
∠P : ∠Q : ∠R = 3 : 2 : 1
∠P = 3x
∠Q = 2x
∠R = x
∠P + ∠Q + ∠R = 180°
⇒ 3x + 2x + x = 180°
⇒ 6x = 180°
⇒ x = 30°
⇒ ∠P = 3 × 30°
⇒ 90°
⇒ ∠Q = 2 × 30°
⇒ 60°
⇒ ∠R = 1 × 30°
⇒ 30°
∠ PRT = ∠QPR + ∠PQR
⇒ 90° + 60°      ----(∵ ∠PRS = 90°)
⇒ ∠PRT = 150°
∠PRT = ∠PRS + ∠TRS      ----(Exterior angle sum)
⇒ 150° = 90° + ∠TRS
⇒ ∠TRS = 150° - 90°
⇒ ∠TRS = 60°
∴ The measure of ∠TRS is 60°.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 11

If

  • m + n + mn = 3
  • n + p + np = 8
  • m + p + pm = 15

then find the value of 12mnp

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 11

⇒ (1 + m)(1 + n) = 4 ………… (i)
⇒ (1 + n)(1 + p) = 9 …………….. (ii)
⇒ (1 + p)(1 + m) = 16 ………………. (iii)
Now [(i) ÷ (ii)] (iii)
⇒ (m + 1)2 = 4/9 16
⇒ m = 5/3
put the Value of m in (i)
⇒ n = 1/2
put the Value of n in (ii)
⇒ p = 5
Hence, 12mnp = 12 × 5/3 × 5 × 1/2 = 50

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 12

Pipe A can fill the tank in 6 hours and with help of B both can fill the tank in 12 hours. If both pipes opened together after how many hours should pipe B be closed so that the tank is filled in 8 hours?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 12

Work = 1/Efficiency
Calculation:
⇒ Pipe A can fill the tank in 6 hours, and Pipe A and B together can fill the tank in 12 hours.
⇒ Pipe B can empty the tank = 1/(1/12 – 1/6) = -12 hours
⇒ In 8 hours A will fill tank = 8/6 = 4/3
⇒ A will fill the extra water = 1 – 4/3 = -1/3
⇒ This extra water will be removed by pipe B in = (-1/12)/(-1/3) = 1/4
⇒ B will be closed after  4 hours
∴ The required result will be 4 hours.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 13

A person divided an amount of Rs.100,000 into two parts and invested in two different schemes. In one he got 10% profit and in the other he got 12%. If the profit percentages are interchanged with these investments he would have got Rs.120 less. Find the ratio between his investments in the two schemes.

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 13

Let the amount invested in scheme I be 'Rs x', then the amount invested in scheme II be 'Rs. (100000 - x)'.
Case - A:
Profit from scheme I is = 10%.
∴ the amount = 10% of x = 0.1x
Profit from scheme II = 12%.
∴ the amount = 12% of (100000 - x) = 0.12 × (100000 - x)
Total amount = 0.1x + 0.12 × (100000 - x)
If the profit percentage gets interchanged:
Case - B:
Profit from scheme I is = 12%.
∴ the amount = 12% of x = 0.12x
Profit from scheme II = 10%.
∴ the amount = 10% of (100000 - x) = 0.1 × (100000 - x).
Total amount = 0.12x + 0.1 × (100000 - x)
According to problem:
[0.1x + 0.12 × (100000 - x)] - [0.12x + 0.1 × (100000 - x)] = 120
⇒ 0.1x + 12000 - 0.12x - 0.12x - 10000 + 0.1x = 120
⇒ 0.2x - 0.24x = 120 - 2000
⇒ -0.04x = 1880

The ratio of investment will be:

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 14

In a certain time a boat can cover 168 km downstream and in the same time it can cover 96 km upstream. If the speed of boat in still water is 11 km/h, then find the speed of current.

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 14

Given: 
In a certain time a boat can cover 168 km downstream and in the same time it can cover 96 km upstream.
Speed of boat in still water is 11 km/h.
Formula used:
Downstream speed = Speed of the boat in still water + Speed of the stream
Upstream speed = Speed of the boat in still water – Speed of the stream
Calculation:
Let the time taken by boat to cover 168 km downstream = ‘t’ hours
So, the time taken by boat to cover 96 km upstream = ‘t’ hours
The downstream speed of boat = (168/t) km/h
And the upstream speed of boat = (96/t) km/h
According to the question:
⇒ [(168/t) + (96/t)]/2 = 11
⇒ (168 + 96)/2t = 11
⇒ 264/2t = 11
⇒ t = 12 hours
∴the speed of current = [(168/12) - (96/12)]/2 = (14 - 8)/2 = 3 km/h

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 15

X and Y are two distinct digits, if the sum of the two-digit numbers formed by using both the digits is a perfect square, what could be the value of (X + Y)?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 15

When X is unit digit, The number,
⇒ 10Y + X
When Y is unit digit, the number,
⇒ 10X + Y
∴ The sum of the numbers,
⇒ 10Y + X + 10X + Y
⇒ 11(X + Y)
For the sum to be a perfect square the value of (X + Y) = 11

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 16

Give the correct order of initials T (true) or F (false) for following statements.
(i) If an ion has 2 electrons in K shell, 8 electrons in L shell and 6 electrons in M shell, then number of S electrons present in that element is 6.
(ii) The maximum number of electrons in a subshell is given by 2n2.
(iii) If electron has magnetic number –1, then it cannot be present in s-orbital.
(iv) Only one radial node is present in 3p orbital.

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 16

If an ion has 2 electrons in K shell, 8 electrons in L shell and 6 electrons in M shell, then number of S electrons present in that element is 6 because of 2 electrons in 1s, 2 electrons in 2s and 2 electrons in 3s.
The maximum number of electrons in a subshell is given by 2(2l +1).
If electron has magnetic number –1, then it cannot be present in s-orbital because only possible magnetic number for s is 0.
Only one radial node is present in 3p orbital.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 17

H2O2 acts as

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 17


Due to nascent oxygen, it can act as a permanent bleaching agent

Oxidation state of hydrogen remains the same. Oxygen in one molecule of H2O2 is oxidised to O2 (–1 → 0) whereas in another molecule is reduced to H2O (–1 → –2) Thus, H2O2 acts both as an oxidizing and reducing agent.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 18

If 3.01× 1020 molecules are removed from 98 mg of H2SO4 then number of moles of H2SO4 left are

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 18

Actual number of moles in 98mg of H2SO4 = 1x10-3 mol
Number of molecules in 10-3 mol of 98 mg of H2SO4= 6.023 x1020
Since 3.01 x 1020 are removed from 98 mg of H2SO4, so half of the molecules are left.
Numbre of moles left in 98 mg of H2SO4=
(1─0.5)x10-3
= 0.5x10-3 moles

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 19

The number of atoms in 29gm of butane is :

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 19

Molecular mass of butane (C4H10) is= 4(12)+10 = 58
No. Of moles of C4H10 = 29/58
No. Of molecules = (29/58)*(6.022*1023)
No. Of atoms = (29/58)*(6.022*1023)*14 = 4.21*1024

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 20

Which of the following is the correct statement regarding the nitrogen in pyridine?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 20

Nitrogen in pyridine has sp2 hybridization because the lone pair of electron present on it is involved in delocalization.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 21

Glycerol on treatment with oxalic acid at 110° forms

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 21

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 22

Arrange the following in order of decreasing mass
i. 1F atom
ii. 1 N atom
iii. 1 O atom
iv. 1 H atom

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 22

Mass of 1F atom=  (since At.wt. of F = 19)
Mass of 1N atom = 
Mass of 1 H atom = 
Mass of 1 O atom= 
i > iii > ii > iv

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 23

If 40 ml of 0.2 M KOH is added to 160 ml of 0.1 M HCOOH [Ka = 2×10-4], the pOH of the resulting solution is

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 23

KOH is a strong base and HCOOH is a weak acid.
C = (160 x 0.1 – 40 x 0.2)/200 = 0.04M
PH = 1/2 (pKa - logC) = 1/2 (4 – log 2 - log 0.04) = 2.55
POH = 14 – 2.55 = 11.4

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 24

Electrolysis of 50% H2SO4 gives

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 24

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 25

The crystal field splitting energy for tetrahederal (Δt) and octahederal (Δo) complexes are related as:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 25

The relation between octahederal and tetrahederal splitting is:
t = (4/9)∆0

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 26

What is the value of de-broglie wavelength of electron accelerated at 400V?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 26

Momentum and kinetic energy are related by:

By de-broglie relation:
λ = h/p = h/
KE of electron = q x V = 1.6 x 10-19 x 400 = 6.4 x 10-17 J

m = 9.1 x 10-31Kg
therefore, wavelength = 0.06nm

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 27

If the energies of the two photons are in the ratio of 3 : 2, their wavelength will be the ratio of

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 27

The energy emitted or absorbed by a black body is discontinuous in the form of small packets of energy called quantum.In  case of light, this quantum is called photon.The energy of radiation is directly proportional to frequency(v).
So the energy is given by: E=h\v  ---->(1)
Also, v =c/λ
Given,the energies of two photons are in the ratio 3 : 2, their wavelengths will be in the ratio of 2 : 3,because according to Planck’s quantum theory

So, λ1 : λ2 = 2:3
Hence option (2) is correct.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 28

The process of separating a crystalloid from a colloid by filtration is called-

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 28

The process of separating a crystalloid from a colloid by filtration is called Dialysis.
Dialysis is the separation of suspended colloidal particles from dissolved ions or molecules of small dimensions (crystalloids) by means of their unequal rates of diffusion through the pores of semipermeable membranes.

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 29

Which of the following compounds can exhibit fac - mer isomerism?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 29

Fac – Mer isomerism is shown by complexes of form Ma3b3

Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 30

The volume of 0.25 M H3POrequired to neutralise 25 ml of 0.03 M Ca(OH)2 is

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 1 - Question 30

Meq. of H3PO3 = Meq. of Ca(OH)2
⇒ V × 0.25 × 2 = 25 × 0.03 × 2 (H3POis dibasic acid)

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