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Question : When formaldehyde and potassium hydroxide are heated, we get 

Option 1: Acetylene

Option 2: Methyl alcohol

Option 3: Methane

Option 4: Ethyl formate

Team Careers360 24th Jan, 2024

Correct Answer: Methyl alcohol


Solution : The correct option is Methyl alcohol

When formaldehyde (CH2O) and potassium hydroxide (KOH) are heated together, they can undergo a reaction known as the Cannizzaro reaction. In the Cannizzaro reaction, formaldehyde is both oxidized to formic acid (HCOOH) and reduced to produce methanol (CH3OH).

11 Views

Question : The side of a square is equal to 40% of the radius of a sphere. If the volume of the sphere is $\frac{500 \pi}{3} \mathrm{~m}^3$, then what is the area of the square?

Option 1: 2 m2

Option 2: 1 m2

Option 3: 9 m2

Option 4: 4 m2

Team Careers360 23rd Jan, 2024

Correct Answer: 4 m2


Solution : The Volume of a sphere is $\frac{500\pi}{3}$ m$^3$.
Side of square = 40% radius of the sphere
Area of square = Side$^2$
According to the question,
The volume of a sphere =  $\frac{4}{3}\pi r^3$
⇒ $\frac{4}{3}\pi r^3$ = $\frac{500\pi}{3}$
⇒ $r^3$ = $\frac{500}{4}$

14 Views

Question : According to Census 2011, which among the following has the minimum population density?

Option 1: Chandigarh

Option 2: Andhra Pradesh

Option 3: Arunachal Pradesh

Option 4: Sikkim

Team Careers360 23rd Jan, 2024

Correct Answer: Arunachal Pradesh


Solution : The correct answer is Arunachal Pradesh.

Arunachal Pradesh is home to 1,383,727 people and covers 83,743 square kilometres (32,333 square miles) as per the 2011 Indian Census. It is the least populated state in India, with only 17 people per square kilometre. The

39 Views

Question : Directions: Select the figure that will replace the question mark (?) in the following figure series.

Option 1:

Option 2:

Option 3:

Option 4:

 

Team Careers360 25th Jan, 2024

Correct Answer:

 


Solution : According to the given figure series, in every alternate box, the geometrical figures/ numbers/ letters shift their position following the below pattern –
1. From Box 1 to Box 2 and from Box 3 to Box 4, the pattern is as follows –


2. From Box

25 Views

Question : If the areas of two similar triangles are in the ratio 36 : 121, then what is the ratio of their corresponding sides?

Option 1: 6 : 11

Option 2: 11 : 5

Option 3: 6 : 5

Option 4: 5 : 12

Team Careers360 24th Jan, 2024

Correct Answer: 6 : 11


Solution : Given,
The ratio of the area of two similar triangles = 36 : 121
If two triangles are similar, then the ratio of the area of both triangles is proportional to the square of the ratio of their corresponding sides.
⇒ $\frac{\text{(Area of

10 Views

Question : Directions: Choose the correct sequence of signs for balancing the following equation.
20 _ 4 _ 6 _ 5 _ 35

Option 1: ÷, ×, –, =

Option 2: ×, ÷, +, =

Option 3: ÷, ×, +, =

Option 4: +, ×, ÷, =

Team Careers360 25th Jan, 2024

Correct Answer: ÷, ×, +, =


Solution : Given:
20 _ 4 _ 6 _ 5 _ 35

Replace the given symbols in the options one by one with the original symbols in the given equation.
First option: ÷, ×, –, =
20 ÷ 4 × 6 – 5 =

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