Exams


Q:

which of the following molecule contains a nonpolar covalent bond?

A) Br2 B) CO2
C) CCl4 D) CO
 
Answer & Explanation Answer: A) Br2

Explanation:

Br-Br.

In Br2, two of the same atoms, pull on each side of the bond is equal making it as non-polar.

The other options all include a significantly more electronegative atom (the oxygens and the chlorine), so those bonds are all polar covalent.

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Filed Under: Chemistry
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Q:

A 12 m long wire is cut into two pieces, one of which is bent into a circle and the other into a square enclosing the circle. What is the radius of the circle?

A) 12/π+4 B) 6/π+4
C) 3/π+4 D) 6/π+2√2
 
Answer & Explanation Answer: B) 6/π+4

Explanation:
As it is clear that 2r = a where a is the side of the square and
R is the radius of circle
It is given that 2πr + 4a = 12
a = 12/(π+4)
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Filed Under: Simplification
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Q:

When some goods or productive factors are completely fixed in amount, regardless of price, the supply curve is

A) horizontal B) downward sloping to the right
C) vertical D) upward sloping to the right
 
Answer & Explanation Answer: D) upward sloping to the right

Explanation:

Although demand curves are typically downward sloping to reflect that consumers’ utility for a good diminishes with increased consumption, firm supply curves are generally upward sloping.The upward sloping character reflects that firms will be willing to increase production in response to a higher market price because the higher price may make additional production profitable.

 

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Filed Under: Indian Economy
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Q:

Common styles of leadership include

A) Autocratic leadership B) Transactional leadership
C) Democratic leadership D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

There are 9 common styles of leadership. They are:

 

Transformational leadership

Transactional leadership

Servant leadership

Autocratic leadership

Laissez-faire leadership

Democratic leadership

Bureaucratic leadership

Charismatic leadership.

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Filed Under: Indian Politics
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Q:

A shopkeeper, sold cashew nuts at the rate Rs 1,260 a kg and bears a loss of 8%. Now if he decides to sell it at Rs 1,386 per kg, what will be the result?

A) 1.2 percent gain B) 2.4 percent gain
C) 1.2 percent loss D) 2.4 percent loss
 
Answer & Explanation Answer: A) 1.2 percent gain

Explanation:
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Filed Under: Profit and Loss
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Q:

PQ is the chord of a circle whose centre is O. ROS is a line segment originating from a point R on the circle that intersect PQ produced at point S such that QS = OR. If ∠QSR = 30°, then what is the value (in degrees)of POR?

A) 30 B) 45
C) 60 D) 90
 
Answer & Explanation Answer: D) 90

Explanation:
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Filed Under: Area
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Q:

What reacts with oxygen to produce rust?

A) Aluminium B) Silver
C) Copper D) Iron
 
Answer & Explanation Answer: D) Iron

Explanation:

Iron reacts with oxygen in the presence of moisture or water to form a red oxide called rust and the reaction involved is called as Redox reaction.

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Filed Under: General Science
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Q:

16/3 =

A) 5.33 B) 6
C) 5.74 D) 5.68
 
Answer & Explanation Answer: A) 5.33

Explanation:

16/3 = 5.333.. = 5.3

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Filed Under: Decimal Fractions
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