Class 12
Question : Directions: A man facing south turns to his left and walks 10 m, then he turns to his right and walks 15 m, again, he turns to his left and walks 5 m, and then he turns to his left and walks 15 m. In which direction is he facing now?
Option 1: West
Option 2: North
Option 3: South
Option 4: East
Correct Answer: North
Solution : First, we will draw the diagram as per the given instructions – Now, we have to find in which direction man is facing now.
Therefore, the man is facing North. Hence, the second option is correct.
Question : In which year did AEB de Chancourtois organise the elements by atomic weight by graphing the elements around a cylinder with a circumference of 16 units, corresponding to the weight of oxygen (O)?
Option 1: 1862
Option 2: 1860
Option 3: 1870
Option 4: 1868
Correct Answer: 1862
Solution : The correct option is 1862.
A.E.B. de Chancourtois attempted to organise the elements by atomic weight using a cylindrical representation, and he called this arrangement the Telluric Helix. He proposed this system in 1862. In the Telluric Helix, elements were arranged around a cylinder
Question : Which one among the following doesn't have any effect on the velocity of sound?
Option 1: Pressure
Option 2: Temperature
Option 3: Humidity
Option 4: Density
Correct Answer: Humidity
Solution : The correct option is Humidity.
While humidity can affect the speed of sound in the air to some extent, it has a negligible impact when compared to other parameters such as temperature, pressure, and density. Changes in humidity (the quantity of water vapour in
Question : Manoj marked his goods 30% above the cost price and gave a 12% discount to the customers. The profit or loss percentage is:
Option 1: 14.8% loss
Option 2: 15.4% profit
Option 3: 14.4% profit
Option 4: 15% loss
Correct Answer: 14.4% profit
Solution : Let the cost price be $x$. Manoj marked his goods 30% above the cost price. So, the marked price $=\frac{130}{100}x=\frac{13x}{10}$ He then gave a 12% discount on the marked price. The selling price $=\frac{100-12}{100}×\frac{13x}{10}=\frac{143x}{125}$ Since the selling price is more than the cost price,
Question : Directions: Study the following histogram of marks in mathematics (out of 50) of students in a class and answer the following question
If the students have got the marks out of 50 and if an A+ grade has been declared for above 90%, then the number of students who have got A+ grade is:
Option 1: 10
Option 2: 20
Option 3: 30
Option 4: 40
Correct Answer: 10
Solution : As per the given graph, The required class interval for the students has got 90% marks out of 50 marks = 90% of 50 marks = 45 marks From the graph, the required class interval is from 45 to 50. The number of students who
Question : Ashoka called the Third Buddhist Council at
Option 1:
Pataliputra
Option 2: Magadha
Option 3: Kalinga
Option 4: Sarnath
Correct Answer:
Solution : Correct Answer is Pataliputra
King Ashoka's support for Pataliputra. Mogaliputta Tissa served as the council's chairman. Theravada was established as the orthodox school and heretics were expelled as a result of this council.The Third Buddhist Council was called by the Mauryan king Ashoka at Ptaliputra
Question : The International Day for the Eradication of Poverty is observed globally on:
Option 1: 17 th October
Option 2: 1st May
Option 3: 10th December
Option 4: 21st March
Correct Answer: 17 th October
Solution : The correct answer is (a) 17 th October.
The International Day for the Eradication of Poverty is a United Nations observance day designated to raise awareness and promote action towards eradicating poverty worldwide. It was first observed in 1987 and has been commemorated
Question : Select the correct active form of the given sentence.
A car full of explosives was apprehended today by the forces.
Option 1: The forces are apprehending a car full of explosives today.
Option 2: A car full of explosives has apprehended the forces today.
Option 3: The forces apprehended a car full of explosives today.
Option 4: The forces have apprehended a car full of explosives today.
Correct Answer: The forces apprehended a car full of explosives today.
Solution : The correct choice is the third option.
Active voice is the voice where the subject performs the action. When transforming the passive voice into the active voice, the agent of the action becomes the subject who performs
Question : If $\triangle A B C \sim \triangle F D E$ such that $A B=9 \mathrm{~cm}, A C=11 \mathrm{~cm}, D F=16 \mathrm{~cm}$ and $D E=12 \mathrm{~cm}$, then the length of $BC$ is:
Option 1: $5 \frac{3}{4} \mathrm{~cm}$
Option 2: $4\frac{3}{5} \mathrm{~cm}$
Option 3: $3\frac{5}{7} \mathrm{~cm}$
Option 4: $6\frac{3}{4} \mathrm{~cm}$
Correct Answer: $6\frac{3}{4} \mathrm{~cm}$
Solution : Given: $A B=9 \mathrm{~cm}, A C=11 \mathrm{~cm}, D F=16 \mathrm{~cm}$ and $D E=12 \mathrm{~cm}$ $\triangle ABC \sim \triangle FDE$ Now, $\frac{AB}{DF}= \frac{BC}{DE}$ Substituting the given values: ⇒ $\frac{9}{16}= \frac{BC}{12}$ $⇒BC = 12 \times \frac{9}{16} = 6\frac{3}{4} \mathrm{~cm}$ Hence, the correct answer is $6\frac{3}{4} \mathrm{~cm}$.
Question : Identify the segment in the sentence which contains a grammatical error. She will come to work though it doesn’t rain tomorrow.
Option 1: though it doesn’t
Option 2: to work
Option 3: rain tomorrow
Option 4: She will come
Correct Answer: though it doesn’t
Solution : The correct choice is the first option.
Explanation: The conjunction, though, is used to introduce a contrast or concession, indicating a condition that contrasts with the main clause. In this context, the use of "though" is not appropriate because it suggests a
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