IIT JEE Practice Question and Answer

Q: What frequency range is the high frequency band? 1711 0

  • 1
    3 kHz
    Correct
    Wrong
  • 2
    3 to 30 MHz
    Correct
    Wrong
  • 3
    30 to 300 MHz
    Correct
    Wrong
  • 4
    10 GHz
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "3 to 30 MHz"
Explanation :

Answer: B) 3 to 30 MHz Explanation: The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.

Q: Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I? 1711 0

  • Show AnswerHide Answer
  • Workspace

Answer :
Explanation :

The answer is 'X'. 1. It is the 24th letter in the alphabetical order. 2. XX (20 in Roman) 3. XXX is used to refer dirty.

Q: The new agricultural strategy in india was introduced in 1710 0

  • 1
    1956
    Correct
    Wrong
  • 2
    1966
    Correct
    Wrong
  • 3
    1976
    Correct
    Wrong
  • 4
    1986
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "1966"
Explanation :

Answer: B) 1966 Explanation: The Green Revolution in India refers to a period of time when agriculture in India changed to an industrial system due to the adoption of modern methods and technology such as high yielding variety (HYV) seeds, tractors, pump sets, etc. Green revolution was started by Dr.M.S. Swaminathan.   The new agricultural strategy was adopted in India during the Third Plan, i.e., during 1960s. As suggested by the team of experts of the Ford Foundation in its report "India’s Crisis of Food and Steps to Meet it" in 1959 the Government decided to shift the strategy followed in agricultural sector of the country.   During the period of mid-1960s, Prof. Norman Borlaug of Mexico developed new high yielding varieties of wheat and accordingly various countries started to apply this new variety with much promise. Similarly, in the kharif season in 1966, India adopted High Yielding Varieties Programme (HYVP) for the first time.

Q: The cost price of 40 Magazines is the same as the selling price of 'P' articles. If the profit is 25%, then the value of 'P' is: 1710 0

  • 1
    32
    Correct
    Wrong
  • 2
    40
    Correct
    Wrong
  • 3
    16
    Correct
    Wrong
  • 4
    30
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "32"
Explanation :

Answer: A) 32 Explanation: Let C.P. of each Magazine be Rs. 1 C.P. of P articles = Rs. P.  S.P. of P articles = Rs. 40.   Profit = Rs. (40 - P)   Now, Gain% = ProfitC.P×100 = 40-PP×100    Here 40-PP×100= 25 -->P = 32.

Q: Which is the oldest tennis tournament in the world and also prestigious? 1710 0

  • 1
    Wimbledon
    Correct
    Wrong
  • 2
    US Open
    Correct
    Wrong
  • 3
    French Open
    Correct
    Wrong
  • 4
    Australian Open
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "Wimbledon"
Explanation :

Answer: A) Wimbledon Explanation: Wimbledon Tournament in the city London, is the prestigious and the oldest tournament in the world.

Q: Which one phosphorylates ADP to make ATP? 1710 0

  • Show AnswerHide Answer
  • Workspace

Answer :
Explanation :

ATP synthase Phosphorylates ADP to make ATP.

Q: P can do a piece of work in 5 less days than Q. If both of them can do the same work in 1119days, in how many days will Q alone do the same work  ? 1710 0

  • 1
    24 days
    Correct
    Wrong
  • 2
    25 days
    Correct
    Wrong
  • 3
    20 days
    Correct
    Wrong
  • 4
    19 days
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "25 days"
Explanation :

Answer: B) 25 days Explanation: Let Q complete that work in 'L' days   => 1L + 1L-5 = 9100   => 9L2-245L+500=0   L = 25 days.

  • Show AnswerHide Answer
  • Workspace

Answer : 4. "Rs.5000"
Explanation :

Answer: D) Rs.5000 Explanation: Let a, b and c be the amounts invested in schemes X, Y and Z respectively. Then, As we know: Simple interest (S.I.) = PTR/100 (a × 10 × 1/100) + (b × 12 × 1/100) + (c × 15 × 1/100) = 3200 = 10a + 12b + 15c = 320000 .........(1) Now, c = 240% of b = 12b/5 .........(2) And, c = 150% of a = 3a/2 => a = 2/3 c = (2 × 12)b/(3 × 5) = 8b/5 .......(3) From (1), (2) and (3), we have 16b + 12b + 36b = 320000 => 64b = 320000 => b = 5000 ∴ Sum invested in Scheme Y = Rs.5000.

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully