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

Test: CSIR-NET Chemical Sciences Mock Test - 9 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 - 9 questions and answers have been prepared according to the CSIR NET Chemical Science exam syllabus.The Test: CSIR-NET Chemical Sciences Mock Test - 9 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 - 9 below.
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Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 1

Insert the missing number.
7, 26, 63, 124, 215, 342, (....)

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

Numbers are (2- 1), (3- 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1) etc.
So, the next number is (83 - 1) = (512 - 1) = 511.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 2

What was the day of the week on, 16th July, 1776?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 2

16th July, 1776 = (1775 years + Period from 1st Jan, 1776 to 16th July, 1776)
Counting of odd days :
1600 years have 0 odd day.
100 years have 5 odd days.
75 years = (18 leap years + 57 ordinary years) =  [(18 x 2) + (57 x 1)] = 93 (13 weeks + 2 days) = 2 odd days
1775 years have (0 + 5 + 2) odd days = 7 odd days = 0 odd day. 
Jan   Feb   Mar  Apr  May  Jun  Jul  
31 + 29 + 31 + 30 + 31 + 30 + 16 = 198 days= (28 weeks + 2 days) 
Total number of odd days = (0 + 2) = 2.  
Required day was 'Tuesday'.

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Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 3

Out of 7 consonants and 4 vowels, how many words of 3 consonants and 2 vowels can be formed?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 3

Number of ways of selecting (3 consonants out of 7) and (2 vowels out of 4) = (7C3 x 4C2
= 210. 
Number of groups, each having 3 consonants and 2 vowels = 210. 
Each group contains 5 letters. 
Number of ways of arranging 5 letters among themselves = 5! = 120 
Required number of ways = (210 x 120) = 25200.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 4

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 4

Let the average after 7th inning = x
Then average after 16th inning = x - 3
16(x-3)+87 = 17x 
 x = 87 - 48 = 39

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 5

The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 5

Let the numbers 13a and 13b.
Then, 13a x 13b = 2028 
⇒ ab = 12. 
Now, the co-primes with product 12 are (1, 12) and (3, 4).
[Note: Two integers a and b are said to be coprime or relatively prime if they have no common positive factor other than 1 or, equivalently, if their greatest common divisor is 1 ]
So, the required numbers are (13 x 1, 13 x 12) and (13 x 3, 13 x 4).
Clearly, there are 2 such pairs.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 6

A can do a piece of work in 10 days, B in 15 days. They work together for 5 days, the rest of the work is finished by C in two more days. If they get Rs. 3000 as wages for the whole work, what are the daily wages of A, B and C respectively (in Rs):

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 6

A's 5 days work =50% 
B's 5 days work = 33.33\% 
C's 2 days work =16.66%[100−(50+33.33)]
Ratio of contribution of work of A, B and C = 50:33(1/3):16(2/3) =3:2:1
A's total share = Rs. 1500
B's total share = Rs. 1000
C's total share = Rs. 500
A's one day's earning = Rs.300 
B's one day's earning = Rs.200 
C's one day's earning = Rs.250

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 7

Two cards are drawn at random from a pack of 52 cards.what is the probability that either both are black or both are queen?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 7

We have n(s)=52C252=52∗51/2∗1=1326
Let A = event of getting both black cards 
B= event of getting both queens
A ∩ B = event of getting queen of black cards 

 

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 8

The perimeters of a circle, a square, and an equilateral triangle are equal. Which one of the following statements is true?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 8

The perimeter of Circle of radius r = 2πr
The perimeter of a square of side s = 4s
The perimeter of an equilateral triangle of side a = 3a
The perimeters of a circle, a square, and an equilateral triangle are equal.
2πr = 4s = 3a

  • s = 3/4 a = 0.75 a
  • r = 3/2π a = 0.477 a

Area of an equilateral triangle:
Area of square = s2 = (0.75 a)= 0.5625 a2
Area of Circle = 2πr= π(0.477 a)2 = 0.714 a2
Acircle > ASquare > Atrg

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

A family has several children. Each boy in this family has as many sisters as brothers, but each girl has twice as many brothers as sisters. How many brothers and sisters are there?

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

Given,
A family has several children.
Each boy in this family has as many sisters as brothers, but each girl has twice as many brothers as sisters.
By checking the given options.
1) 1 and 2
Here we see only one boy is there so he has not as many sisters as brothers, thus this option is gets eliminated.
2) 3 and 4
Here we see if one boy is selected he has two brothers which are not as many as sisters, thus this option is gets eliminated.
3) 6 and 3
Here we see if one boy is selected he has five brothers which are also not as many as sisters, thus this option is gets eliminated.
4) 4 and 3
Here we see if one boy is selected he has three brothers and three sisters, and if a girl selected she has two sisters and four brothers which is she has twice as many brothers as sisters.
Hence, the correct answer is 4 and 3.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 10

Which year in the future will have the same calendar exactly as 2021?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 10

In the case of the repeating year, we add 6 with the given year if the given year is a leap year + 1.
2020 is a leap year.
2021 = leap year + 1
so we add 6. 2021 + 6= 2027
The trick to remember:

2021 has the same calendar as that of 2027.
Hence, “2027 is the correct answer.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 11

If 'n' is a natural numbers then, n (n + 1) (n + 2) is always divisible by:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 11

Given:
n is a natural number.
Concept Used:
If n is an even number, then n, n + 2 is divisible by 2.
If n is an odd number, then n + 1 is divisible by 2.
Calculations:
If n is an even number, then n, n + 2 is divisible by 2.
If n is an odd number, then n + 1 is divisible by 2.
⇒ Therefore, (n + 1)(n + 2) is divisible by 2.
If we take three consecutive numbers, then there will be divisible by 3.
So, from the above
⇒ n(n + 1)(n + 2) is divisible by 3.
⇒ and it is divisible by 2 also.
⇒ Therefore, It is divisible by 6 also.
∴ The three consecutive numbers are divisible by 6.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 12

Given a semicircle with O as the centre, as shown in the figure, the ratio  are chords.

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 12

Let the radius of the semicircle is r as shown in the diagram given below.

Now, OA = OC = OB = r
AB = OA + OB = 2r

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 13

In the given figure, CD and AB are diameters of circle and AB and CD are perpendicular to each other. QL and SR are perpendiculars to AB and CD respectively. Radius of circle is 5 cm, PB ∶ PA = 2 ∶ 3 and CN ∶ ND = 2 : 3. What is the length (in cm) of SM?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 13


Since PA ∶ PB = 3 ∶ 2 and AB is diameter which is equal to 10 cm,
⇒ PA = 3/5 × 10 = 6 cm and PB = 10 - 6 = 4 cm
Since AO is the radius of the circle,
∴ OP = 6 - 5 = 1 cm
In the same way,
ND = 6 cm and NC = 4 cm
∴ NO = 6 - 5 = 1 cm
Now applying Pythagoras theorem in ΔOSN,
⇒ OS2 = NS2 + NO2
Since OS is the radius of the circle, OS = 5 cm
⇒ 25 = NS2 + 1
⇒ NS = 2√6
∴ SM = (2√6 - 1) cm

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 14

The given bar graph shows the data of the production of suitcase (in thousand numbers) by three branches P, Q and R of a certain over the years. 

What is the ratio of the average production of suitcases of branch P in the periods of 2012 to 2016 to the average production of suitcases of branch Q in the same periods?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 14

Total production of suitcases of branch P in the periods of 2012 to 2016 = 60 + 50 + 35 + 55 + 50 = 250
The average production of suitcases of branch P in the periods of 2012 to 2016 = 250/5 = 50
Total production of suitcases of branch Q in the periods of 2012 to 2016 = 30 + 35 + 45 + 45 + 55 = 210
The average production of suitcases of branch P in the periods of 2012 to 2016 = 210/5 = 42
The average production of suitcases of branch P in the periods of 2012 to 2016 : The average production of suitcases of branch P in the periods of 2012 to 2016
⇒ 50 : 42
⇒ 25 : 21

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 15

The average of twelve 2 digit numbers is decreased by 3 when the digits of one of the 2 digit numbers is interchanged. Find the difference between the digits of that number.

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 15

Given:
The average of twelve 2 digit numbers is decreased by 3 when the digits of one of the 2 digit numbers is interchanged.
Formula used:
Average = sum of observations/ Number of observations
Calculation:
Let the number whose digits are being interchanged is 10x + y
After interchanging the digits, the number becomes 10y + x
At first average = (sum of 11 numbers + 10x + y)/12
After interchanging the digits, average = (sum of 11 numbers + 10y + x)/12
So, (sum of 11 numbers + 10y + x)/12 = (sum of 11 numbers + 10x + y)/12 - 3
⇒ (sum of 11 numbers + 10y + x) = (sum of 11 numbers + 10x + y) - 36
⇒ 10y + x = 10x + y - 36
⇒ 9x - 9y = 36
⇒ x - y = 36/9 
⇒ x - y = 4
∴ difference between two digits is 4.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 16

All the following species are strong oxidizing agents. Their strength as oxidizing agents in acidic solution is such that –

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 16

The strength as oxidizing agents in acidic solution is in the order of 

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 17

Which of the following fibres is made of polyamides?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 17

Nylon is polymer having amide linkages, thus it is a polyamide.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 18

FeCr2O4 (chromite) is converted to Cr by following steps:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 18

4FeCrO+ 8Na2CO+ 7H2O → 8Na2CrO+ 2Fe2O+ 8CO2
Chromite Ore
2Na2CrO+ H2SO4 → Na2Cr2O+ 2NaSO+ H2O
Na2Cr2O+ 3C → Na2Cr2O+ 3CO
Na2Cr2O+ H2O → Cr2O+ 2NaOH
Cr2O3 + 2A1 → 2Cr + Al2O3

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 19

During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud' These are

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 19

More electropositive metals associated with Cu (Fe, Zn, Co, Ni) pass in solution state and less electropositive metals (Au, Ag) collect below the anode as anode mud.
Hence, option C is correct.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 20

V2 O5 is red or orange in colour. It is a/an..... oxide –

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 20

V2O5 is red or orange in color and it is an amphoteric oxide.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 21

Aniline in a set of the following reactions yielded a coloured product 'Y'.

The structure of 'Y' would be

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 21

The diazotisation of -NH2 group takes place in the presence of NaNO2/HCland a coupling productis formed with the diazonium chloride and the active aryl nucleus.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 22

Polypropylene can be obtained by polymerisation of

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 22


Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 23

Intermediate formed during reaction of  with Br2 and KOH are:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 23

The given reaction is Hoffmann Bromamide degradation reaction to synthesize an amine from amide as shown below:

The mechanism of this reaction can be represented as:
(i) RCONH2 + Br2  RCONHBr +HBr

From the mechanism ,it is evident that RCONHBr (step-II) and RNCO (step-IV) are formed as intermediates.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 24

Natural rubber has

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 24

The repeating unit has the cis-configuration in natural rubber with chain extensions on the same side of the ethylene double bond. This is essential for elasticity. If the configuration is trans, the polymer is either a hard plastic or like gutta-percha.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 25

Heating mixture of Cu2O and Cu2S will give

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 25

2Cu2O + Cu2S → 6Cu + SO2
Hence, option A is correct.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 26

Which of the following amines is the most basic in nature?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 26

Basic character increases with increase in the electron donating (+I) group. N, N-dimethyl aniline is most basic owning to the restriction in the delocalization of the lone pair over the benzene ring owing to the presence of two methyl groups.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 27

Which is not true statement about KMnO4?

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 27

In basic medium KMnO4 does not changes to Mn+2, it changes to MnO2

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 28

The synthesis of amine by Gabriel Phthalimide reaction cannot yield

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 28

The Gabriel phthalimide reaction can be used only for preparation of primary amines. It cannot be used to prepare secondary or tertiary amines. The compound given in option C is a tertiary amine and hence cannot be prepared by Gabriel phthalimide reaction. The reaction is as shown below:

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 29

Galvanisation means:

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 29

Galvanisation is a process in which iron is protected by forming a layer of Zn on Fe.

Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 30

Benzaldehyde condenses with N,N-dimethyl aniline in presence anhydrous ZnCl2 to give

Detailed Solution for Test: CSIR-NET Chemical Sciences Mock Test - 9 - Question 30

Malachite green is a dye formed when benzaldehyde condenses with N,N-dimethyl aniline in presence anhydrous ZnCl2.

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