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Question : Who discovered the rubber-making process through the vulcanisation method?
Option 1: John Dunlop
Option 2: Charles Goodyear
Option 3: David Macmillan
Option 4: Issac Newton
Correct Answer: Charles Goodyear
Solution : The correct option is Charles Goodyear.
Charles Goodyear is credited with creating the first industrial vulcanisation process that produced rubber that was malleable, waterproof and moldable. In Springfield, Massachusetts, his method — heating rubber with sulphur — was first applied in 1841.
Question : The speed of the boat down the stream is 125% of the speed in still water. If the boat takes 30 minutes to cover 20 km in still water, then how much time (in hours) will it take to cover 15 km upstream?
Option 1: $\frac{3}{4}$
Option 2: $\frac{1}{2}$
Option 3: $\frac{1}{4}$
Option 4: $1$
Correct Answer: $\frac{1}{2}$
Solution : Speed of boat in still water = $\frac{20}{\frac{30}{60}}= 40$ km/hr Speed of boat downstream = $50$ km/h (As it is $125$% more than the speed of the boat in still water) Speed of current = $50 - 40$ = $10$ km/hr The time it will
Question : A sum becomes INR 5400 in 4 years at the rate of 20% per annum on simple interest. What is the sum?
Option 1: INR 3000
Option 2: INR 2500
Option 3: INR 4000
Option 4: INR 2000
Correct Answer: INR 3000
Solution : Rate, $R$ = 20% Term, $n$ = 4 Let $P$ be the principal. Amount = INR 5400 Simple interest = $5400 - P$ We know, Simple interest = $\frac{\text{Principal × Rate × Time}}{100}$ $⇒5400 - P=\frac{P×20×4}{100}$ $⇒5400=\frac{4P}{5} + P$ $\therefore P=\frac{5400×5}{9} = 3000$ Hence,
Question : Let $a b, a \neq b$, is a 2-digit prime number such that ba is also a prime number. The sum of all such numbers is:
Option 1: 407
Option 2: 418
Option 3: 396
Option 4: 374
Correct Answer: 418
Solution : Given, ab is a 2-digit prime number a ≠ b The list of such prime numbers is 13, 31, 17, 71, 37, 73, 79, 97. The Sum of these numbers = 13 + 31 + 17 + 71 + 37 + 73 + 79 +
Question : Directions: In the following question, some parts of the sentence may have some errors. Find out which part of the sentence has an error and select the appropriate option. If the sentence is free from error, select "No Error".
You have been doing (1) / your homework (2) / regularly? (3) / No Error (4)
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (1)
Solution : The error lies in the first part of the sentence.
To form an interrogative sentence in the present perfect continuous tense, we use the structure "have/has + subject + been + v-ing".
So, ''you have'' should be replaced with ''have you'' to ask
Question : In $\triangle ABC$, AB = BC = $k$, AC =$\sqrt2k$, then $\triangle ABC$ is a:
Option 1: Isosceles triangle
Option 2: Right-angled triangle
Option 3: Equilateral triangle
Option 4: Right isosceles triangle
Correct Answer: Right isosceles triangle
Solution : AB = $k$ BC = $k$ AC = $\sqrt2k$ ⇒ AB2 = $k^2$ ⇒ BC2 = $k^2$ ⇒ AC2 = $2k^2$ $\therefore$ AB2 + BC2 = AC2 and AB = BC By Pythagoras theorem, $\triangle$ ABC is
Question : Directions: In the following question, some parts of the sentence have errors, and some are correct. Find out which part of the sentence has an error. The number of that part is the answer. If a sentence is error-free, your answer is "No Error."
Mobile phones are so importance these days that they are no longer luxury items but have become a necessity.
(1) a necessity
(2) so importance these days
(3) no longer
(4) No error
Correct Answer: (2)
Solution : The error lies in the second option.
The word "importance" is a noun while "important" is an adjective. In this context, we want to describe mobile phones as being essential or significant, which requires the adjective "important".
Therefore, the correct sentence is "Mobile phones
Question : Comprehension: In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
The coded box placed on the first page of every chapter (1)________ quick response code. The first QR code is to (2)__________ the complete e-textbook. The (3)__________ quick response code will help you access the relevant e-resources linked to each other. This will help you (4)__________ your learning in a (5)__________ manner.
Question: Select the most appropriate option to fill in the blank number 3.
Option 1: subsequent
Option 2: irrelevant
Option 3: former
Option 4: shown
Correct Answer: subsequent
Solution : The correct choice is the first option.
Subsequent means following, or next in order. It helps convey that the next QR will help in accessing the relevant resources.
Question : The Gateway of India was built by
Option 1: Frank Lloyd Wright
Option 2: George Wittet
Option 3: Frank Gehry
Option 4: Zaha Hadid
Correct Answer: George Wittet
Solution : The correct option is George Wittet.
The Gateway of India is an arch-shaped structure erected in Mumbai, India, in the early 20th century. George Wittet served as the gateway's principal architect. Its building was finished in 1924. It was built to mark
Question : The right to vote is a
Option 1: Political right
Option 2: Civil right
Option 3: Economic right
Option 4: Legal right
Correct Answer: Political right
Solution : The correct option is Political right.
The right to vote is a political right that permits individuals to participate in democratic governance by choosing representatives, guaranteeing accountability, fostering equality and expressing their choices peacefully. It's a political right since it allows individuals to actively
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