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21 Views

Question : When camphor is heated, which of the following changes will take place?

Option 1: Solid to gas

Option 2: Solid to liquid to gas

Option 3: Liquid to gas

Option 4: Solid to liquid

Team Careers360 21st Jan, 2024

Correct Answer: Solid to gas


Solution : The correct answer is Solid to gas.

When camphor is heated, it directly turns into a gas without passing through the liquid phase. This process of directly changing solids into gas is known as the sublimation process. The sublimation of camphor is an

11 Views

Question : If $(\frac{\sec \theta-1}{\sec \theta+1})^n=\operatorname{cosec} \theta-\cot \theta$, then $n=?$

Option 1: 1

Option 2: 0.5

Option 3: –1

Option 4: –0.5

Team Careers360 18th Jan, 2024

Correct Answer: 0.5


Solution : Given expression,
$(\frac{\sec \theta-1}{\sec \theta+1})^n=\operatorname{cosec} \theta-\cot \theta$
Considering L.H.S.,
We know, $\sec\theta=\frac{1}{\cos\theta}$
= $\left\{\frac{\frac{1}{\cos\theta}-1}{\frac{1}{\cos\theta}+1}\right\}^n$
= $\left\{\frac{1-\cos\theta}{1+\cos\theta}\right\}^n$
Multiplying and dividing by $1-\cos\theta$, we get,
= $\left\{\frac{1-\cos\theta}{1+\cos\theta}\times\frac{1-\cos\theta}{1-\cos\theta}\right\}^n$
= $\left\{\frac{(1-\cos\theta)^2}{1-\cos^2\theta}\right\}^n$
= $\left\{\frac{(1-\cos\theta)^2}{\sin^2\theta}\right\}^n$
Now consider R.H.S,
$\operatorname{cosec} \theta-\cot \theta$
We know, $\operatorname{cosec} \theta=\frac{1}{\sin\theta}$ and $\cot\theta=\frac{\cos\theta}{\sin\theta}$
= $\frac{1}{\sin\theta}-\frac{\cos\theta}{\sin\theta}$
= $\frac{1-\cos\theta}{\sin\theta}$

15 Views

Question : Select the most appropriate option to fill in the blank.
They probably subsisted on insects and other small _________ invertebrates and perhaps even on aquatic vertebrates.

Option 1: skittish

Option 2: recluse

Option 3: reverent

Option 4: terrestrial

Team Careers360 21st Jan, 2024

Correct Answer: terrestrial


Solution : The fourth option is correct.

The sentence suggests that the creatures probably survived on insects and other small creatures, and it uses the word terrestrial to describe these creatures.
Terrestrial refers to things related to or inhabiting the land, as opposed to aquatic or celestial

15 Views

Question : The circumference of a circle is 132 cm. The area of the circle is: (Take $\pi=\frac{22}{7}$)

Option 1: 1380 cm2

Option 2: 1322 cm2

Option 3: 1086 cm2

Option 4: 1386 cm2

Team Careers360 25th Jan, 2024

Correct Answer: 1386 cm2


Solution : Given: The circumference of a circle is 132 cm.
Let the radius of the circle = $r$ cm
We know,
The circumference of a circle = $2\pi r$
Here, $2\pi r =132$
$⇒2×\frac{22}{7}×r=132$
$⇒r=132×\frac{1}{2}×\frac{7}{22}$
$⇒r=21$ cm
Now, the area of the circle =

23 Views

Question : The product of the digits of a 2-digit number is 12. If we add 36 to the number, the new number obtained is a number formed by the interchange of the digits. What is the number?

Option 1: 62

Option 2: 34

Option 3: 26

Option 4: 43

Team Careers360 21st Jan, 2024

Correct Answer: 26


Solution : Let the unit digit of the number be $y$ and the ten digit be $x$.
Number $= 10x + y$
Product of digits $= x × y = 12$ ---(i)
According to the question,
$10x + y + 36=10y + x$
$9y – 9x =

18 Views

Question : Who is called as 'Father of Modern Computer'?

Option 1: Alexander Fleming

Option 2: Bill Gates

Option 3: Michael Faraday

Option 4: Charles Babbage

Team Careers360 25th Jan, 2024

Correct Answer: Charles Babbage


Solution :  Correct answer is - Charles Babbage.

After creating and conceptualizing the Analytical Engine in 1837, Charles Babbage was hailed as the father of computing. The Arithmetic Logic Unit (ALU), elementary flow control, and integrated memory were all components of the Analytical Engine. Babbage wanted

6 Views

Question : Which of the following gases shields the surface of the Earth from ultraviolet (UV) radiation from the Sun?

Option 1: Carbon monoxide

Option 2: Ozone

Option 3: Oxygen

Option 4: Carbon dioxide

Team Careers360 21st Jan, 2024

Correct Answer: Ozone


Solution : The correct answer is Ozone.

The French physicists Charles Fabry and Henri Buisson discovered the ozone layer in 1913. 97 to 99 per cent of the medium-frequency UV radiation emitted by the sun is absorbed by the ozone layer.

7 Views

Question : Directions: From the given answer figure, select the one in which the question figure is hidden/embedded.

Option 1:

Option 2:

Option 3:

Option 4:

Team Careers360 18th Jan, 2024

Correct Answer:


Solution : As there is no restriction on the rotation of the figures, we will check all possible angles where all the question figures fit in the option figures.
The question figures are embedded in the first option and are represented by different colours in the figure below.

The question have been saved in answer later, you can access it from your profile anytime. Access now