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Q:

In how many different ways can the letters of the word 'THERAPY' be arranged so that the vowels always come together?

A) 720 B) 1440
C) 1800 D) 3600
 
Answer & Explanation Answer: B) 1440

Explanation:

Given word is THERAPY.

Number of letters in the given word = 7

Number of vowels in the given word = 2 = A & E

Required number of different ways, the letters of the word THERAPY arranged such that vowels always come together is

6! x 2! = 720 x 2 = 1440.

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Filed Under: Permutations and Combinations
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Q:

India has donated what amount for a peacekeeping initiative at the UN?

A) $ 3 lakh B) $ 5 lakh
C) $ 10 lakh D) $ 1 lakh
 
Answer & Explanation Answer: A) $ 3 lakh

Explanation:

India has donated $ 3 lakh for a peacekeeping initiative at the United Nations pipeline for peacekeeping initiative at the UN.

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Filed Under: World Organisations
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Q:

50% of a = b, then b% of 40 is the same as _________ of a.

A) 0.25 B) 0.16
C) 2 D) 0.2
 
Answer & Explanation Answer: D) 0.2

Explanation:
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Filed Under: Percentage
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Q:

If the average age of 20 students in Class-I is 10 years and average age of 25 students in Class II is 12 years, find the average age (in years) of all students.

A) 11 B) 11.111
C) 10.50 D) 10.85
 
Answer & Explanation Answer: B) 11.111

Explanation:
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Filed Under: Average
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Q:

If I walk at 7/6 of my usual speed, then I reach my office 15 minutes early. What is the usual time taken (in minutes) by me to reach the office?

 

A) 60 B) 75
C) 90 D) 105
 
Answer & Explanation Answer: D) 105

Explanation:
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Filed Under: Percentage
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Q:

What is the common characteristic of the elements of the same group in the periodic table?

A) Electrons in outer most shell B) Total number of electrons
C) Total number of protons D) Atomic weight
 
Answer & Explanation Answer: A) Electrons in outer most shell

Explanation:
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Filed Under: Chemistry
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Q:

The principal quantum number indicates what property of an electron?

A) energy of electron B) distance of electron from nucleus
C) both a & b D) number of subshells
 
Answer & Explanation Answer: C) both a & b

Explanation:

The principal quantum number is the property of an electron which determines the energy of electron and the distance of electron from the nucleus of an atom.

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Filed Under: Chemistry
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Q:

Which formula represents a polar molecule?

A) C - O B) C - N
C) H - N D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A chemical bond in which the electrons are not shared equally due to differences in the electronegativity of the atoms.

 

The polarity of a covalent bond is measured using its dipole moment.

 Large dipole moment = more polar

 Small dipole moment = more nonpolar.

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Filed Under: Chemistry
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