IIT JEE Practice Question and Answer

Q: Who is known as the Second Law Officer of India? 2361 0

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    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: If 15% of x = 20% of y, then x:y is  ___? 2360 0

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

Answer: A) 4:3 Explanation: Given 15% of x = 20% of y => 15x = 20y => x/y = 20/15 => x : y = 4 : 3

Q: How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together ? 2359 0

  • 1
    7
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    11
    Correct
    Wrong
  • 4
    5
    Correct
    Wrong
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Answer : 2. "9"
Explanation :

Answer: B) 9 Explanation: LCM of 2, 3, 7 is 42. => (700 – 300)/42 = 9  22/42 => 9 Numbers.

Q: The modulus of elasticity for mild steel is approximately equal to 2359 0

  • 1
    210 kN/mm2
    Correct
    Wrong
  • 2
    100 kN/mm2
    Correct
    Wrong
  • 3
    80 kN/mm2
    Correct
    Wrong
  • 4
    10 kN/mm2
    Correct
    Wrong
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Answer : 1. "210 kN/mm2"
Explanation :

Answer: A) 210 kN/mm2 Explanation: It is useful to have a property of a material that is independent of the size of the sample and can be use to compare its elastic properties with another - this is called the Modulus of Elasticity for the material. The modulus of elasticity is defined as:   Modulus of elasticity = Stress / Strain   There are three types of moduli. They are : (a) the Young Modulus - tensile and compression longitudinal stress (b) the shear modulus - a shearing stress (c) the bulk modulus - volume changes of the specimen.

Q: A remedy for all diseases 2358 0

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    Antiseptic
    Correct
    Wrong
  • 2
    Lyric
    Correct
    Wrong
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    Narcotics
    Correct
    Wrong
  • 4
    Panacea
    Correct
    Wrong
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Answer : 4. "Panacea"
Explanation :

Answer: D) Panacea Explanation: Panacea, also known as panchrest, is a medicine supposed remedy that is claimed to cure all diseases and prolong life indefinitely. It is named after the Greek goddess of universal remedy Panakeia.

Q: A train covers a distance between station A and station B in 45 min.If the speed of the train is reduced by 5 km/hr,then the same distance is covered in 48 min.what is the distance between the stations A and B ? 2356 0

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    80 kms
    Correct
    Wrong
  • 2
    60 kms
    Correct
    Wrong
  • 3
    45 kms
    Correct
    Wrong
  • 4
    32 kms
    Correct
    Wrong
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Answer : 2. "60 kms"
Explanation :

Answer: B) 60 kms Explanation: Let 'd' be the distance and 's' be the speed and 't' be the timed=sxt45 mins = 3/4 hr and 48 mins = 4/5 hrAs distance is same in both cases;s(3/4) = (s-5)(4/5)3s/4 = (4s-20)/515s = 16s-80s = 80 km.=> d = 80 x 3/4 = 60 kms.

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 ? 2355 0

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    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: A man saves 20% of his monthly salary. If an account of dearness of things he is to increase his monthly expenses by 15%, he is only able to save Rs. 400 per month. What is his monthly salary ? 2355 0

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    Rs. 6000
    Correct
    Wrong
  • 2
    Rs. 4500
    Correct
    Wrong
  • 3
    Rs. 5000
    Correct
    Wrong
  • 4
    Rs. 6500
    Correct
    Wrong
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Answer : 3. "Rs. 5000"
Explanation :

Answer: C) Rs. 5000 Explanation: Income = Rs. 100 Expenditure = Rs. 80 Savings = Rs. 20 Present Expenditure 80x(15/100) = Rs. 12 = 80 + 12 = Rs. 92 Present Savings = 100 – 92 = Rs. 8 100 ------ 8? --------- 400 => 5000 His salary = Rs. 5000

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