IIT JEE Practice Question and Answer

Q: Cobalt 60 is used for cancer treatment it emmits which rays? 1576 0

  • 1
    Alpha
    Correct
    Wrong
  • 2
    Beta
    Correct
    Wrong
  • 3
    Gamma
    Correct
    Wrong
  • 4
    X rays
    Correct
    Wrong
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Answer : 3. "Gamma"
Explanation :

Answer: C) Gamma Explanation: Cobalt therapy or cobalt-60 therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer.   Cobalt 60 is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. It is produced artificially in nuclear reactors.

Q: Waksman got the noble prize for the discovery of 1575 0

  • 1
    Streptomycin
    Correct
    Wrong
  • 2
    Chloromycetin
    Correct
    Wrong
  • 3
    Pencillin
    Correct
    Wrong
  • 4
    Neomycin
    Correct
    Wrong
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Answer : 1. "Streptomycin"
Explanation :

Answer: A) Streptomycin Explanation: In 1952, Waksman was awarded the Nobel Prize in Physiology or Medicine in recognition "for his discovery of streptomycin," the first antibiotic active against tuberculosis.

Q: What gets bigger the more you take away? 1575 0

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Answer :
Explanation :

A Hole gets bigger and bigger as you take more away from it.

Q: In a daily morning walk three persons step off together. their steps measure 75 cm, 80 cm and 85 cm respectively. What is the minimum distance each should walk so that thay can cover the distance in complete steps  ? 1575 0

  • 1
    222 m 44 cm
    Correct
    Wrong
  • 2
    204 m
    Correct
    Wrong
  • 3
    201 m 21 cm
    Correct
    Wrong
  • 4
    208 m
    Correct
    Wrong
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Answer : 2. "204 m"
Explanation :

Answer: B) 204 m Explanation: To find the minimum distance, we have to get the LCM of 75, 80, 85 Now, LCM of 75, 80, 85 = 5 x 15 x 16 x 17 = 20400 Hence, the minimum distance each should walk so that thay can cover the distance in complete steps = 20400 cms = 20400/100 = 204 mts.

Q: A earns 50% of B's salary, B earns 80% of C's salary. If the total earnings for a month is Rs. 22000, then what is the earning for A ? 1575 0

  • 1
    Rs. 4000
    Correct
    Wrong
  • 2
    Rs. 4200
    Correct
    Wrong
  • 3
    Rs. 4400
    Correct
    Wrong
  • 4
    Rs. 4600
    Correct
    Wrong
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Answer : 1. "Rs. 4000"
Explanation :

Answer: A) Rs. 4000 Explanation: Let C's salary be Rs. x Then B's salary = 80x/100 => A's salary = (50/100) * (80x/100) = 40x/100 But given total earnings in a month = 22000 => x + 80x/100 + 40x/100 = 22000 => x + 120x/100 = 22000 => x = 10000 => A's salary = 40 x 10000/100 = Rs. 4000

Q: 1 Billion Seconds Equals to 1574 0

  • 1
    34.76 years
    Correct
    Wrong
  • 2
    32.48 years
    Correct
    Wrong
  • 3
    33.31 years
    Correct
    Wrong
  • 4
    31.68 years
    Correct
    Wrong
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Answer : 4. "31.68 years"
Explanation :

Answer: D) 31.68 years Explanation: We know that 1 year = 365.25 days 1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds   => 1 Year = 365.25 x 24 x 60 x 60 Seconds But 1 billion seconds = ? 1 Year = 365.25 x 24 x 60 x 60 Seconds     ?     =  1000000000 Seconds   ? = 1000000000365.25 x 24 x 60 x 60 years = 31. 68 years.

Q: Which of these is Not a Carcinogen? 1574 0

  • 1
    Cadmium
    Correct
    Wrong
  • 2
    Asbestos
    Correct
    Wrong
  • 3
    Benzene
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: Asbestos can cause  Lungs Gastrointestinal tract  types of Cancer. Benzene can cause Leukemia Hodgkin's lymphoma types of Cancer. Cadmium can cause Prostate type of Cancer.

Q: Commercial banks are funded through which of the following? 1574 0

  • 1
    Stock holders
    Correct
    Wrong
  • 2
    Government funding
    Correct
    Wrong
  • 3
    Services
    Correct
    Wrong
  • 4
    Customer deposits
    Correct
    Wrong
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Answer : 4. "Customer deposits"
Explanation :

Answer: D) Customer deposits Explanation: A commercial bank is a type of financial institution that accepts deposits, offers checking account services, makes business, personal and mortgage loans, and offers basic financial products like certificates of deposit (CDs) and savings accounts to individuals and small businesses. A commercial bank is where most people do their banking, as opposed to an investment bank.   Commercial banks are funded through customer deposits. These banks make money by providing loans and earning interest income from those loans. The types of loans a commercial bank can issue vary and may include mortgages, auto loans, business loans and personal loans. A commercial bank may specialize in just one or a few types of loans.   Customers who deposit money into these accounts effectively lend money to the bank and are paid interest. However, the interest rate paid by the bank on money they borrow is less than the rate charged on money they lend.

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