Practice Question and Answer

Q: Which two atoms form an ionic bond? 1844 0

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Answer :
Explanation :

Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another.. This bond generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.   Example :: One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.

Q: A Committee of 5 persons is to be formed from a group of 6 gentlemen and 4 ladies. In how many ways can this be done if the committee is to be included atleast one lady? 1844 0

  • 1
    123
    Correct
    Wrong
  • 2
    113
    Correct
    Wrong
  • 3
    246
    Correct
    Wrong
  • 4
    945
    Correct
    Wrong
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Answer : 3. "246"
Explanation :

Answer: C) 246 Explanation: A Committee of 5 persons is to be formed from 6 gentlemen and 4 ladies by taking.    (i) 1 lady out of 4 and 4 gentlemen out of 6  (ii) 2 ladies out of 4 and 3 gentlemen out of 6  (iii) 3 ladies out of 4 and 2 gentlemen out of 6  (iv) 4 ladies out of 4 and 1 gentlemen out of 6    In case I the number of ways = C14×C46 = 4 x 15 = 60  In case II the number of ways = C24×C36 = 6 x 20 = 120  In case III the number of ways = C34×C26 = 4 x 15 = 60 In case IV the number of ways = C44×C16 = 1 x 6 = 6    Hence, the required number of ways = 60 + 120 + 60 + 6 = 246

Q: After working for 8 days, Hari Ram finds that only 1/3 rd of the work has been done. He employs Satya who is 60% as efficient as Hari Ram. How many days more would Satya take to complete the work ? 1844 0

  • 1
    24 1/2 days
    Correct
    Wrong
  • 2
    25 3/2 days
    Correct
    Wrong
  • 3
    24 2/3 days
    Correct
    Wrong
  • 4
    26 2/3 days
    Correct
    Wrong
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Answer : 4. "26 2/3 days"
Explanation :

Answer: D) 26 2/3 days Explanation: 1/3 ---- 8 1 -------? Hari can do total work in = 24 days As satya is 60% efficient as Hari, then Satya = 1/24 x 60/100 = 1/40 => Satya can do total work in 40 days 1 ----- 40 2/3 ---- ? => 26 2/3 days.

Q:

A landscape which is caused due to the fissure in the earth along which one side has moved down with reference to the other is known as

1844 0

  • 1
    Rift Valley
    Correct
    Wrong
  • 2
    U Shaped Valley
    Correct
    Wrong
  • 3
    V Shaped Valley
    Correct
    Wrong
  • 4
    Hanging Valley
    Correct
    Wrong
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Answer : 1. "Rift Valley"

Q:

Which national leader has been called Lokhitwadi?

1844 0

  • 1
    Gopalhari Deshmukh
    Correct
    Wrong
  • 2
    Lala Lajpat Rai
    Correct
    Wrong
  • 3
    Motilal Nehru
    Correct
    Wrong
  • 4
    Mahatma Gandhi
    Correct
    Wrong
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Answer : 1. "Gopalhari Deshmukh"

Q:

Consider the statements and conclusions given below and find out which of the / (s) conclusions logically follows from the given statement.
Statement:
No country is completely self-sufficient these days.
Conclusion:
I. Country men in general have become lazy.
II. It is impossible to produce and produce everything that a country needs.

1844 0

  • 1
    Only conclusion I follows.
    Correct
    Wrong
  • 2
    Only conclusion II follows.
    Correct
    Wrong
  • 3
    Either conclusion I or conclusion II follows.
    Correct
    Wrong
  • 4
    Neither conclusion I nor conclusion II follows.
    Correct
    Wrong
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Answer : 4. "Neither conclusion I nor conclusion II follows."

Q:

Who had been adjudged "Player of the Series" for theICC U-19 World Cup?

1844 0

  • 1
    Akbar Ali
    Correct
    Wrong
  • 2
    Sushant Mishra
    Correct
    Wrong
  • 3
    Parvez Hossain Emon
    Correct
    Wrong
  • 4
    Yashasvi Jaiswal
    Correct
    Wrong
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Answer : 4. "Yashasvi Jaiswal"

Q: Pluto dwells on the inner edge of the 1844 0

  • 1
    Main asteroid belt
    Correct
    Wrong
  • 2
    Oort cloud
    Correct
    Wrong
  • 3
    Kuiper belt
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 3. "Kuiper belt"
Explanation :

Answer: C) Kuiper belt Explanation: Pluto dwells on the inner edge of the The Kuiper belt which is a belt of asteroids that lies on the outer edge of the solar system. Pluto is a dwarf planet that is supposed to be no longer a planet and is still considered a planet because of its history in the solar system.   It takes 248 years to make one orbit around the sun. As to where it is, depends on time.

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