GATE Practice Question and Answer

Q: Lipids are insoluble in water because lipids are 1283 0

  • 1
    Hydrophobic
    Correct
    Wrong
  • 2
    Zwitter ions
    Correct
    Wrong
  • 3
    Hydrophylic
    Correct
    Wrong
  • 4
    Neutral
    Correct
    Wrong
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Answer : 1. "Hydrophobic"
Explanation :

Answer: A) Hydrophobic Explanation: Lipids are soluble in solvents of low polarity, which simply means that lipids are soluble in nonpolar solvents. This solubility property is a result of the large nonpolar regions that are indicative of the lipid molecule.

Q: Two letters are randomly chosen from the word TIME. Find the probability that the letters are T and M? 1283 0

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

Answer: B) 1/6 Explanation: Required probability is given by P(E) = n(E)n(S) = 14C2 = 16

Q: What it goes up but never comes down? 1283 0

  • 1
    Umbrella
    Correct
    Wrong
  • 2
    Hot air balloon
    Correct
    Wrong
  • 3
    Age
    Correct
    Wrong
  • 4
    Rocket
    Correct
    Wrong
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Answer : 3. "Age"
Explanation :

Answer: C) Age Explanation: Yeah, its your AGE which always goes up but sadly never comes down.

Q: abcdefghijklmnopqrstuvwxyz Riddle What sentence contains all abcdefghijklmnopqrstuvwxyz? 1282 0

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Answer :
Explanation :

The Quick Brown Fox Jumped Over The Lazy Dog  is the sentence which contains all 26 alphabets i.e, from a to z.

Q: A number is 2 more than thrice the second number and 4 times the smaller number is 5 more than the greater number. What is greater number  ? 1281 0

  • 1
    7
    Correct
    Wrong
  • 2
    23
    Correct
    Wrong
  • 3
    9
    Correct
    Wrong
  • 4
    21
    Correct
    Wrong
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Answer : 2. "23"
Explanation :

Answer: B) 23 Explanation: Let the greater and smaller number be p and q respectively. 4q = p + 5 ------ (I) p = 3q+2 ------- (II) From equation (I) and (II) q = 7 p = 23

Q: If  1 1 1 1 = R    2 2 2 2 = T    3 3 3 3 = E    4 4 4 4 = N   Then  5 5 5 5 = ? 1281 0

  • 1
    Y
    Correct
    Wrong
  • 2
    Z
    Correct
    Wrong
  • 3
    T
    Correct
    Wrong
  • 4
    X
    Correct
    Wrong
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Answer : 1. "Y"
Explanation :

Answer: A) Y Explanation: If you add all the terms of the LHS of equality, then the last letter of the sum written in words would give you the RHS. 1 + 1 + 1 + 1 = 4 = FOUR 2 + 2 + 2 + 2 = 8 = EIGHT 3 + 3 + 3 + 3 = 12 = TWELVE 4 + 4 + 4 + 4 = 16 = SIXTEEN   So, following the same pattern. 5 + 5 + 5 + 5 = 20 = TWENTY   That gives us our answer to 5 5 5 5 =  "Y".

Q: Number Challenge Puzzle ? 1280 0

  • 1
    1
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    5
    Correct
    Wrong
  • 4
    0
    Correct
    Wrong
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Answer : 1. "1"
Explanation :

Answer: A) 1 Explanation: In each row,  Sum of 1st two digit number + last two digit number = Middle two digit number i.e., 1st row 15 + 40 = 55 2nd row 46 + 47 = 93 Similarly, 7x + 16 = 87 => x = 1.

Q: Intermolecular forces in HCl are 1280 0

  • 1
    Hydrogen bonding
    Correct
    Wrong
  • 2
    Dipole-dipole
    Correct
    Wrong
  • 3
    Dispersion force
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: Intermolecular forces : The forces of attraction present in between the molecules or atoms or compounds is termed as intermolecular forces. The molecule HCl is composed of hydrogen and chlorine atom. There is high difference in electronegativities therefore, it is polar in nature. The H end of HCl is permanently slightly positive charge. The Cl end of HCl has a permanent slight negative charge. the "H" in one molecule is attracted to the "Cl" in a neighbor. The intermolecular force is weak compared to a covalent bond. But this dipole-dipole interaction is one of the stronger intermolecular attractions. It also has hydrogen bonding and dispersion forces.  Dispersion forces are the weakest forces which are present in between all molecules or atoms.Hydrogen bonds are present in molecules having at least one H-A bond where A is the strong electronegative atom (mainly F, Cl and N).

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