IIT JEE Practice Question and Answer
8Q: Cobalt 60 is used for cancer treatment it emmits which rays? 1576 05b5cc697e4d2b4197774c5c5
5b5cc697e4d2b4197774c5c5- 1Alphafalse
- 2Betafalse
- 3Gammatrue
- 4X raysfalse
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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 05b5cc626e4d2b4197774b82f
5b5cc626e4d2b4197774b82f- 1Streptomycintrue
- 2Chloromycetinfalse
- 3Pencillinfalse
- 4Neomycinfalse
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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 05b5cc696e4d2b4197774c5a4
5b5cc696e4d2b4197774c5a4- Show AnswerHide Answer
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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 05b5cc6c0e4d2b4197774dabc
5b5cc6c0e4d2b4197774dabc- 1222 m 44 cmfalse
- 2204 mtrue
- 3201 m 21 cmfalse
- 4208 mfalse
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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 05b5cc6c3e4d2b4197774dc3b
5b5cc6c3e4d2b4197774dc3b- 1Rs. 4000true
- 2Rs. 4200false
- 3Rs. 4400false
- 4Rs. 4600false
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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 05b5cc6afe4d2b4197774d24f
5b5cc6afe4d2b4197774d24f- 134.76 yearsfalse
- 232.48 yearsfalse
- 333.31 yearsfalse
- 431.68 yearstrue
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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 05b5cc6afe4d2b4197774d273
5b5cc6afe4d2b4197774d273- 1Cadmiumfalse
- 2Asbestosfalse
- 3Benzenefalse
- 4All the abovetrue
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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 05b5cc699e4d2b4197774c729
5b5cc699e4d2b4197774c729- 1Stock holdersfalse
- 2Government fundingfalse
- 3Servicesfalse
- 4Customer depositstrue
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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.

