GATE Practice Question and Answer

Q: Which of the following chemical compounds has the highest boiling point? 1623 0

  • 1
    Dimethyl ether (CH3OCH3)
    Correct
    Wrong
  • 2
    Methanol (CH3OH)
    Correct
    Wrong
  • 3
    Methane (CH4)
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 2. "Methanol (CH3OH)"
Explanation :

Answer: B) Methanol (CH3OH) Explanation: Chemical Compounds with stronger intermolecular forces have higher boiling points.   The order of strengths of intermolecular forces is:  London dispersion < dipole-dipole < H-bonding   Methane (CH4) — London dispersion forces Dimethyl ether (CH3OCH3) — dipole-dipole attractions Methanol (CH3OH) — hydrogen bonding Therefore, Methanol - CH3OH with H-Bonding have highest Boiling Point among the given chemical compounds.

Q: What is the 13th letter of the English Alphabet? 2671 0

  • 1
    M & N
    Correct
    Wrong
  • 2
    M & M
    Correct
    Wrong
  • 3
    N & N
    Correct
    Wrong
  • 4
    N & L
    Correct
    Wrong
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Answer : 1. "M & N"
Explanation :

Answer: A) M & N Explanation: There are 26 English Alphabets. They are:   A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z.   Therefore, from the left end the 13th letter is M and is Consonent. And from the right end the 13th letter is N and is Consonent.

Q: 6 : 18 :: 4 : ? 1383 0

  • 1
    14
    Correct
    Wrong
  • 2
    6
    Correct
    Wrong
  • 3
    16
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 4. "8"
Explanation :

Answer: D) 8 Explanation: Here the given number analogy follows two patterns that, 6  18 --> 6 x 3 4 12 --> 4 x 3   OR 6 18 ----> 6x6/2 = 18 4 8 ----> 4x4/2 = 8   As 12 is not available in the options, 8 is correct answer.

Q: Marathon is to race as Hibernation is to 4766 0

  • 1
    Eat
    Correct
    Wrong
  • 2
    Sleep
    Correct
    Wrong
  • 3
    Winter
    Correct
    Wrong
  • 4
    Dream
    Correct
    Wrong
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Answer : 2. "Sleep"
Explanation :

Answer: B) Sleep Explanation: Marathon is to Race as Hibernation is to Sleep.   Marathon is a long race in the similar way Hibernation refers to a long sleep.

Q: What is 12 S of the Z? 1173 0

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Answer :
Explanation :

12 S of Z represents 12 Signs of the Zodiac.   It is similar to the 1. 52 W in a Y        -  52 weeks in a year 2. 3 H in a C          -  3 Hands in a Clock 3. 3600 S in an H   -  3600 Seconds in an Hour 4. 5 O in the W      -   5 Oceans in the World

Q: What is 90 days from today?   Hints : Today is 20th January 2017, Sunday 3274 0

  • 1
    18th April, Friday
    Correct
    Wrong
  • 2
    20th April, Saturday
    Correct
    Wrong
  • 3
    21th April, Sunday
    Correct
    Wrong
  • 4
    19th April, Saturday
    Correct
    Wrong
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Answer : 2. "20th April, Saturday"
Explanation :

Answer: B) 20th April, Saturday Explanation: Given Today is 20th January 2017, Sunday In january, we have 31 days February - 28 days (Non leap year) March - 31 days April - 30 days => Remaining days => 31 - 20 = 11 in Jan + 28 in Feb + 31 in Mar = 11 + 28 + 31 = 70 days More 20 days to complete 90 days => upto 20th April   Therefore, after 90 days from today i.e, 20th Jan 2017 is 20th Apr 2017.   Now, the day of the week will be  90/7 => Remainder '6' As the day starts with '0' on sunday  6 => Saturday.   Required day is 20th April, Saturday.

Q: Which of the following is a Heterogeneous Mixture? 2447 0

  • 1
    Air
    Correct
    Wrong
  • 2
    Table salt
    Correct
    Wrong
  • 3
    Soda
    Correct
    Wrong
  • 4
    Brass
    Correct
    Wrong
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Answer : 3. "Soda"
Explanation :

Answer: C) Soda Explanation: Here Soda is a Heterogenous Mixture.   A Heterogeneous Mixture is a mixture having a non-uniform composition i.e, the mixture contains components in different phases. Using various means, the parts in the mixture can be separated from one another.

Q: DNA can be found in what Organelles? 2038 0

  • 1
    Chloroplasts and Mitichondria
    Correct
    Wrong
  • 2
    Nucleus and Ribosomes
    Correct
    Wrong
  • 3
    Ribosomes and Mitochondria
    Correct
    Wrong
  • 4
    Endoplasmic Reticulum and Nucleus
    Correct
    Wrong
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Answer : 1. "Chloroplasts and Mitichondria"
Explanation :

Answer: A) Chloroplasts and Mitichondria Explanation: DNA can be found in 3 Organelles namely Nucleus, Mitochondria in animals and Chloroplasts in plants.

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