IIT JEE Practice Question and Answer

Q: In a joint family, there are 24 members whose age is decreased by 4 months, when one girl aged 24 years is replaced by a new boy. Find the age of the new boy ? 1615 0

  • 1
    18 years
    Correct
    Wrong
  • 2
    12 years
    Correct
    Wrong
  • 3
    15 years
    Correct
    Wrong
  • 4
    16 years
    Correct
    Wrong
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Answer : 4. "16 years"
Explanation :

Answer: D) 16 years Explanation: Age of new boy = (Age of moved girl) – (Number of family members × Decreased in average) = 24 – 24×4/12 = 24 – 8 = 16 years.

Q: What does the APR on a credit card determine? 1615 0

  • 1
    fee paid by bank for deposits
    Correct
    Wrong
  • 2
    fee paid for borrowing money
    Correct
    Wrong
  • 3
    Both A & B
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 2. "fee paid for borrowing money"
Explanation :

Answer: B) fee paid for borrowing money Explanation: A credit card's interest rate is the price you pay for borrowing money. For credit cards, the interest rates are typically stated as a yearly rate. This is called the annual percentage rate (APR). On most cards, you can avoid paying interest on purchases if you pay your balance in full each month by the due date. Your APR is expressed in terms of a year, but credit card companies use it to calculate charges over your monthly statement period.

Q: Which of the following chemical compounds has the highest boiling point? 1615 0

  • 1
    Dimethyl ether (CH3OCH3)
    Correct
    Wrong
  • 2
    Methanol (CH3OH)
    Correct
    Wrong
  • 3
    Methane (CH4)
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 2. "Methanol (CH3OH)"
Explanation :

Answer: B) Methanol (CH3OH) Explanation: Chemical Compounds with stronger intermolecular forces have higher boiling points.   The order of strengths of intermolecular forces is:  London dispersion < dipole-dipole < H-bonding   Methane (CH4) — London dispersion forces Dimethyl ether (CH3OCH3) — dipole-dipole attractions Methanol (CH3OH) — hydrogen bonding Therefore, Methanol - CH3OH with H-Bonding have highest Boiling Point among the given chemical compounds.

Q: Logic Challenge 1614 0

  • 1
    40
    Correct
    Wrong
  • 2
    20
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    36
    Correct
    Wrong
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Answer : 3. "2"
Explanation :

Answer: C) 2 Explanation: In the starting it is given that Couple went to the movie and No other went with them. So total members went to movie is only 2.

Q: Why did settlers move to the great plains? 1614 0

  • 1
    There were minerals in the region
    Correct
    Wrong
  • 2
    Government was offering 160 acres of land for free
    Correct
    Wrong
  • 3
    Land prices in the East were getting too expensive
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 4. "All of the above"
Explanation :

Answer: D) All of the above Explanation: Land prices in the East were getting too expensive, and the West (Great Plains) offered an opportunity for more people to own land. Although the area suffered from extreme weather and poor soils, many people decided to take the risk and venture to the Great Plains. The government was also committed to supporting those who decided to make the move.   Settlers moved to the Great Plains for several reasons. One reason was the government was offering 160 acres of land for free if the settler agreed to live on the land for five years. This was part of the Homestead Act of 1862.   Some people went to the Great Plains when they heard there were minerals in the region. Gold was one mineral found in the Great Plains region. People hoped to make a lot of money by mining gold.

Q: What fields did progressives aim to reform? 1614 0

  • 1
    workplace conditions
    Correct
    Wrong
  • 2
    education
    Correct
    Wrong
  • 3
    government
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 4. "All of the above"
Explanation :

Answer: D) All of the above Explanation:

Q: Which of the following is not an enzyme? 1614 0

  • 1
    Oxytocin
    Correct
    Wrong
  • 2
    Trypsin
    Correct
    Wrong
  • 3
    Pepsin
    Correct
    Wrong
  • 4
    Ptyalin
    Correct
    Wrong
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Answer : 1. "Oxytocin"
Explanation :

Answer: A) Oxytocin Explanation: Oxytocin is a mamallian hormone and also acts as neuro transmitter in the brain.

Q: Which one of the following is often called "Twitter of China" ? 1614 0

  • 1
    Youku
    Correct
    Wrong
  • 2
    Sina weibo
    Correct
    Wrong
  • 3
    We chat
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 2. "Sina weibo"
Explanation :

Answer: B) Sina weibo Explanation:

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