IIT JEE Practice Question and Answer

Q: Find the odd one out? 6, 3, 3, 4.5, 10 2387 0

  • 1
    3
    Correct
    Wrong
  • 2
    4.5
    Correct
    Wrong
  • 3
    6
    Correct
    Wrong
  • 4
    10
    Correct
    Wrong
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Answer : 4. "10"
Explanation :

Answer: D) 10 Explanation: Here the given number series is 6, 3, 3, 4.5, 10 The odd one in the given series is 10 The pattern it follows is 6 6 x 0.5 = 3 3 x  1  = 3 3 x 1.5 = 4.5 4.5 x 2 = 9   Hence, the odd number is 10.

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.  ? 2387 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: In a class of 180, where girls are twice the number of boys, Rupesh[a boy]  ranked 34th from the top. If there are 18 girls ahead of Rupesh, how many boys are after him in rank? 2387 0

  • 1
    45
    Correct
    Wrong
  • 2
    44
    Correct
    Wrong
  • 3
    60
    Correct
    Wrong
  • 4
    can't be determined
    Correct
    Wrong
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Answer : 2. "44"
Explanation :

Answer: B) 44 Explanation: No. of boys up to the 34th rank = 34-18 = 16    Total no of boys = 180x1/2+1 = 60    number of boys after the rank of Rupesh = 60 - 16 = 44

Q: The Mudumalai National Park is located in which state  ? 2386 2

  • 1
    Chattisgarh
    Correct
    Wrong
  • 2
    Haryana
    Correct
    Wrong
  • 3
    Tamil Nadu
    Correct
    Wrong
  • 4
    Karnataka
    Correct
    Wrong
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Answer : 3. "Tamil Nadu"
Explanation :

Answer: C) Tamil Nadu Explanation: The Mudumalai National Park (MNP) is located about 150 kilometres north-west of Coimbatore city in Tamil Nadu. The protected area is home to several endangered and vulnerable species including Indian elephant, Bengal tiger, gaur and Indian leopard. There are at least 266 species of birds in the sanctuary, including critically endangered Indian white-rumped vulture and long-billed vulture.

Q: Opposite word of Enormous? 2386 0

  • 1
    tiny
    Correct
    Wrong
  • 2
    large in size
    Correct
    Wrong
  • 3
    high quantity
    Correct
    Wrong
  • 4
    to the most extent
    Correct
    Wrong
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Answer : 1. "tiny"
Explanation :

Answer: A) tiny Explanation: Enormous means very large in quantity or size or extent. Antonym or opposite of enormous is little, small or tiny.

Q: Which of the following is the strongest base? 2385 0

  • 1
    LiCH3
    Correct
    Wrong
  • 2
    LiF
    Correct
    Wrong
  • 3
    LiOH
    Correct
    Wrong
  • 4
    LiNH2
    Correct
    Wrong
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Answer : 1. "LiCH3"
Explanation :

Answer: A) LiCH3 Explanation: The stability of the ions is determined by the energy of the lone pairs. Carbon has the least effective nuclear charge (Zeff) and so the lone pair on the CH3− ion has the highest energy, making it the least stable ion and so the strongest base. The Zeff increases as we move across the period until we get to fluorine which has the greatest Zeff and so its lone pairs have the lowest energy, making F− the least basic ion.   In order of decreasing basicity they are ranked LiCH3 > LiNH2 > LiOH > LiF. We are dealing with the ions F−, OH−, NH2− and CH3− and so the factor which influences their basicity is the stability of the ion compared to its conjugate acid.

Q: Which statement is true of all atoms that are anions? 2385 0

  • 1
    The atom has fewer protons than does a neutral atom of the same element.
    Correct
    Wrong
  • 2
    The atom has more protons than electrons.
    Correct
    Wrong
  • 3
    The atom has more neutrons than protons.
    Correct
    Wrong
  • 4
    The atom has more electrons than protons.
    Correct
    Wrong
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Answer : 4. "The atom has more electrons than protons."
Explanation :

Answer: D) The atom has more electrons than protons. Explanation: Anions are atoms or radicals (groups of atoms), that have gained electrons. Since they now have more electrons than protons, anions have a negative charge.

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? 2383 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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