GATE Practice Question and Answer

Q: Which of the following equations represents Photosynthesis? 2196 0

  • 1
    6CO2 + 6H2O -----> C6H12O6 + 6O2
    Correct
    Wrong
  • 2
    C6H12O6 + 6O2 -----> CO2 + 6H2O
    Correct
    Wrong
  • 3
    CO2 + H2O -----> C6H12O6 + 6O2
    Correct
    Wrong
  • 4
    6O2 + 6H2O -----> C6H12O6 + 6CO2
    Correct
    Wrong
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Answer : 1. "6CO2 + 6H2O -----> C6H12O6 + 6O2"
Explanation :

Answer: A) 6CO2 + 6H2O -----> C6H12O6 + 6O2 Explanation: Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.   Photosynthesis can be represented using a chemical equation.   The overall balanced equation is                 6CO2 +  6H2O   →Sunlight    C6H12O6   +   6O2Source of Carbon & Oxygen  + Source of Electrons & Hydrogen + Energy that drives Photosynthesis             ----> Sugar + Gas produced by splitting water.   Where  CO2 = carbon dioxide  H2O = waterC6H12O6 = glucose  O2 = oxygen.

Q: Rs. 69 were divided among 115 family members so that each lady gets 50 paise less than each gentleman, and each gentleman received twice the paise as each lady received. Find the number of  gentlemen in the family? 2193 0

  • 1
    23
    Correct
    Wrong
  • 2
    92
    Correct
    Wrong
  • 3
    48
    Correct
    Wrong
  • 4
    52
    Correct
    Wrong
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Answer : 1. "23"
Explanation :

Answer: A) 23 Explanation: Total number of female members = 115 Let the number of males = x Number of females = y => x + y = 115  ......(1) According to the given data, x + y(0.50) = 69 ......(2) From (1) & (2), we get 0.5y = 46 => y = 46 x 2 = 92 => x = 115 - 92 = 23   Hence, required number of gentlemen in the family = x = 23.

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Answer : 1. "11 days"
Explanation :

Answer: A) 11 days Explanation: Let 'n' number of days it take to complete.   we know that sum of n number= n/2[2a+(n-1)d]where a=20,d=1;n/2[2x20+(n-1)1]=275n[n+39]=550n2 + 39n - 550 = 0 n2+ 50n - 11n - 550 = 0(n-11) (n-50) = 0n-11 = 0;n = 11(Days).

Q: The interest on a certain deposit at 4.5% p.a. is Rs. 202.50 in one year. How much will the additional interest in one year be on the same deposit at 5% p.a.  ? 2190 0

  • 1
    Rs. 22.5
    Correct
    Wrong
  • 2
    Rs. 2.5
    Correct
    Wrong
  • 3
    Rs. 202
    Correct
    Wrong
  • 4
    Rs. 25
    Correct
    Wrong
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Answer : 1. "Rs. 22.5"
Explanation :

Answer: A) Rs. 22.5 Explanation: We know that I = PTR/100=> P = 20250/4.5 = 4500Now, new Interest at 5% = 4500x1x5/100 = 225Now the additional amount = 225 - 202.5 = Rs. 22.5

Q: What kind of tree can you carry in your hand? 2182 0

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Answer :
Explanation :

Palm tree.

Q: Malleability and Ductility of metals can be accounted due to 2179 0

  • 1
    the crystalline structure in metal
    Correct
    Wrong
  • 2
    the interaction of electrons with metal ions in the lattice
    Correct
    Wrong
  • 3
    the presence of electrostatic force
    Correct
    Wrong
  • 4
    the capacity of layers of metal ions to slide over the other
    Correct
    Wrong
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Answer : 4. "the capacity of layers of metal ions to slide over the other"
Explanation :

Answer: D) the capacity of layers of metal ions to slide over the other Explanation:

Q: I. a2-7a+12 = 0, II. b2-3b+2 = 0 Solve both the equations to find the values of a and b  ? 2179 0

  • 1
    if a > b
    Correct
    Wrong
  • 2
    if a < b
    Correct
    Wrong
  • 3
    if the relationship between a and b cannot be established.
    Correct
    Wrong
  • 4
    if a ≤ b
    Correct
    Wrong
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Answer : 1. "if a > b"
Explanation :

Answer: A) if a > b Explanation: I.  (a - 3)(a - 4) = 0   => a = 3, 4   II.   (b - 2)(b - 1) = 0   => b = 1, 2   => a > b

Q: What rights does the Declaration of Independence express? 2178 0

  • 1
    The right to remain silent when interrogated by police
    Correct
    Wrong
  • 2
    The right to citizenship
    Correct
    Wrong
  • 3
    Legal rights of citizens
    Correct
    Wrong
  • 4
    Human rights of citizens, including life and liberty
    Correct
    Wrong
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Answer : 3. "Legal rights of citizens"
Explanation :

Answer: C) Legal rights of citizens Explanation: The Declaration of Independence express Legal rights of citizens.

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