IIT JEE Practice Question and Answer

Q: Where are Maglev trains used? 1812 0

  • 1
    London
    Correct
    Wrong
  • 2
    Russia
    Correct
    Wrong
  • 3
    Germany
    Correct
    Wrong
  • 4
    Japan
    Correct
    Wrong
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Answer : 4. "Japan"
Explanation :

Answer: D) Japan Explanation: Maglev trains are used in Japan, South Korea and China only. Maglev derived from magnetic levitation using the principle of magnetic repulsion is a system of train transportation that uses two sets of magnets, one set to repel and push the train up off the track as in levitation then another set to move the 'floating train' ahead at great speed taking advantage of no friction. Maglev trains are therefore quieter and smoother than conventional trains, and have the potential for much higher speeds Despite over a century of research and development, maglev transport systems are in operation in just three countries Japan, South Korea and China.   Hence Maglev -- Magnetic-levitation.

Q: STIMULANT : ACTIVITY :: 1812 0

  • 1
    diagnosis : treatment
    Correct
    Wrong
  • 2
    fertilizer : growth
    Correct
    Wrong
  • 3
    symptom : disease
    Correct
    Wrong
  • 4
    food : hunger
    Correct
    Wrong
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Answer : 2. "fertilizer : growth"
Explanation :

Answer: B) fertilizer : growth Explanation:

Q: Where is the sheet number on a map found? 1812 0

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Answer :
Explanation :

The sheet number on the map is found in bold print in both the upper right and lower left areas of the margin.

Q: How many three digit numbers 'abc' are formed where two of the three digits are same ? 1812 0

  • 1
    252
    Correct
    Wrong
  • 2
    648
    Correct
    Wrong
  • 3
    243
    Correct
    Wrong
  • 4
    900
    Correct
    Wrong
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Answer : 3. "243"
Explanation :

Answer: C) 243 Explanation: Digits are 0,1,2,3,4,5,6,7,8,9. So no. of digits are 10   First all possible case => 9(0 excluded) x 10 x 10 = 900   Second no repetition allowed =>9 x 9 x 8 = 648   Third all digits are same => 9 (111,222,333,444,555,666,777,888,999)   Three digit numbers where two of the three digits are same = 900 - 648 - 9 = 243 ;

Q: Find the remainder when 629 is divided by 5 ? 1812 0

  • 1
    0
    Correct
    Wrong
  • 2
    1
    Correct
    Wrong
  • 3
    3
    Correct
    Wrong
  • 4
    5
    Correct
    Wrong
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Answer : 2. "1"
Explanation :

Answer: B) 1 Explanation: All powers of 6 has 6 in units place so answer will definitely be 1.

Q: In an exhibition, Almond bought a painting for Rs. 20000. He later sold it to Olive for Rs. 23000. Olive sold it to Sarah for double the profit percentage that Almond earned. At what price should Sarah sell this painting to earn 8% profit ? 1811 0

  • 1
    Rs. 34,410
    Correct
    Wrong
  • 2
    Rs. 31,184
    Correct
    Wrong
  • 3
    Rs. 29,999
    Correct
    Wrong
  • 4
    Rs. 32,292
    Correct
    Wrong
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Answer : 4. "Rs. 32,292"
Explanation :

Answer: D) Rs. 32,292 Explanation: Almond Selling price = CP(1 + P%/100) => CP = 20000, SP = 23000 => 23000 = 20000 (1 + P/100) => P% = 100(23000/20000 - 1) = 15 Then, Olive's P% = 30% SP for Olive = CP for Sarah = 23000(1 + 30/100) = 29900 Now Sarah wants to earn profit of 8% => Sp for Sarah = 29900(1 + 8/100) = Rs. 32,292.

Q: The percentage of irrigated land in India is about 1811 0

  • 1
    66%
    Correct
    Wrong
  • 2
    35%
    Correct
    Wrong
  • 3
    71%
    Correct
    Wrong
  • 4
    22%
    Correct
    Wrong
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Answer : 2. "35%"
Explanation :

Answer: B) 35% Explanation: According to World Bank Indicator India - Land use: Agriculture Land - 1797090 sq. Km (about 60.4%).  Forest Area - 677598 sq. Km. (about 22.08%).  Agriculture Irrigated land - 35 %.

Q: photosynthesis takes place faster in 1810 0

  • 1
    darkness
    Correct
    Wrong
  • 2
    red light
    Correct
    Wrong
  • 3
    white light
    Correct
    Wrong
  • 4
    yellow light
    Correct
    Wrong
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Answer : 3. "white light"
Explanation :

Answer: C) white light Explanation: As far as the rate of photosynthesis is concerned, it is fastest in white light making the rate of photosynthesis maximum. After White, We Have Violet Light Where Photosynthesis Occur To A Higher Extent as It Has The Shortest Wavelength Hence Has The Max Energy.   So The Order Is  ::  white>violet>blue.

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