IIT JEE Practice Question and Answer

Q: What does this symbol mean '&'? 2598 0

  • 1
    Caret
    Correct
    Wrong
  • 2
    Bar
    Correct
    Wrong
  • 3
    Ampersand
    Correct
    Wrong
  • 4
    Reversed Caret
    Correct
    Wrong
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Answer : 3. "Ampersand"
Explanation :

Answer: C) Ampersand Explanation: '&' is a Logical Symbol and is called as Ampersand.   ^ is called Caret - is called Bar v is called Reversed Caret.

Q: Tilak rides on a cycle to a place at speed of 22 kmph and comes back at a speed of 20 kmph. If the time taken by him in the second case is 36 min. more than that of the first case, what is the total distance travelled by him (in km)? 2596 0

  • 1
    132 km
    Correct
    Wrong
  • 2
    264 km
    Correct
    Wrong
  • 3
    134 km
    Correct
    Wrong
  • 4
    236 km
    Correct
    Wrong
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Answer : 2. "264 km"
Explanation :

Answer: B) 264 km Explanation: Let the distance travelled by Tilak in first case or second case = d kms Now, from the given data, d/20 = d/22 + 36 min => d/20 = d/22 + 3/5 hrs => d = 132 km.   Hence, the total distance travelled by him = d + d = 132 + 132 = 264 kms.

Q: Who is known as the Second Law Officer of India? 2595 0

  • 1
    Chief justice of India
    Correct
    Wrong
  • 2
    Law minister of India
    Correct
    Wrong
  • 3
    Attorney general of India
    Correct
    Wrong
  • 4
    Solicitor general of India
    Correct
    Wrong
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Answer : 4. "Solicitor general of India"
Explanation :

Answer: D) Solicitor general of India Explanation: The Solicitor General of India is the second law officer of the country.   The Solicitor General of India is below the Attorney General for India, who is the Indian government's chief legal advisor, and its primary lawyer in the Supreme Court of India.   The Solicitor General of India is appointed for the period of 3 years. He assists the Attorney General and is himself assisted by several Additional Solicitors General of India.

Q: The number of ways that 8 beads of different colours be strung as a necklace is 2595 0

  • 1
    2520
    Correct
    Wrong
  • 2
    2880
    Correct
    Wrong
  • 3
    4320
    Correct
    Wrong
  • 4
    5040
    Correct
    Wrong
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Answer : 1. "2520"
Explanation :

Answer: A) 2520 Explanation: The number of ways of arranging n beads in a necklace is (n-1)!2=(8-1)!2=7!2 = 2520  (since n = 8)

Q: Processor's speed of a computer is measured in 2594 0

  • 1
    Hertz
    Correct
    Wrong
  • 2
    Baud
    Correct
    Wrong
  • 3
    MIPS
    Correct
    Wrong
  • 4
    BPS
    Correct
    Wrong
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Answer : 1. "Hertz"
Explanation :

Answer: A) Hertz Explanation: CPU speed is the central factor in a computer's performance. And this CPU speed depends on the processor in the CPU chip. In a computer, clock speed refers to the number of pulses per second generated by an oscillator that sets the tempo for the processor. Clock speed is usually measured in Hertz (Hz).   But now-a-days, a pure processor's performance is measured in MIPS (Millions of Instructions Per Second). As here in the question, how a processor's speed is measured is asked and it is Hertz.    Hence, Processor's speed of a computer is measured in Hertz(Hz) [MHz, GHz].

Q: Cellular respiration is best associated with the 2593 0

  • 1
    microtubule
    Correct
    Wrong
  • 2
    ribosome
    Correct
    Wrong
  • 3
    Golgi apparatus
    Correct
    Wrong
  • 4
    mitochondrion
    Correct
    Wrong
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Answer : 4. "mitochondrion"
Explanation :

Answer: D) mitochondrion Explanation: Cellular respiration is best associated with the organelle Mitochondrion.

Q: Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats ? 2593 0

  • 1
    1 : 2 : 3
    Correct
    Wrong
  • 2
    2 : 3 : 4
    Correct
    Wrong
  • 3
    3: 4 : 5
    Correct
    Wrong
  • 4
    4 : 5 : 6
    Correct
    Wrong
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Answer : 2. "2 : 3 : 4"
Explanation :

Answer: B) 2 : 3 : 4 Explanation: Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. Seats for Mathematics, Physics and Biology in a school are 5x, 7x and 8x. There is a proposal to increase these seats by 40%, 50% and 75% respectively. Then Seats for Mathematics, Physics and Biology in a school will be 1.4 X 5x, 1.5 X 7x and 1.75 X 8x and ratio will be 7 : 10.5 : 14  => 2:3:4.

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? 2592 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

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