IIT JEE Practice Question and Answer

Q: Simplify  413 + 215 + 414 = ? 947 0

  • 1
    10 47/60
    Correct
    Wrong
  • 2
    11 45/73
    Correct
    Wrong
  • 3
    11 47/36
    Correct
    Wrong
  • 4
    10 35/48
    Correct
    Wrong
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Answer : 1. "10 47/60"
Explanation :

Answer: A) 10 47/60 Explanation: The given equation is in Mixed fraction. Now to solve this type of fractions, 413 + 215 + 414 =?? = 4 + 2 + 4 + 13 + 15 + 14 ? = 10 + 4760? = 104760

Q: Who has Indian gymnast become the first Indian to win an individual medal at the Gymnastics World Cup? 946 0

  • 1
    Dipa Karmakar
    Correct
    Wrong
  • 2
    Swati Narang
    Correct
    Wrong
  • 3
    Veenita Kumari
    Correct
    Wrong
  • 4
    Aruna Budda Reddy
    Correct
    Wrong
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Answer : 4. "Aruna Budda Reddy"
Explanation :

Answer: D) Aruna Budda Reddy Explanation: Aruna Budda Reddy has created history by becoming the first Indian to win an individual medal at the Gymnastics World Cup in Melbourne, Australia. She clinched a Bronze medal in the Women’s Vault.

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Answer :
Explanation :

It is given that the first digit is 1/3 of the second. There are 3 such possibilities 1)1 and 32)2 and 63)3 and 9 Now, the third digit is the sum of the first and second digits.1)1 + 3 = 4 2)2 + 6 = 83)3 + 9 = 12It is clear that option 3 is not possible. So we are left with only two options. Also, the last digit is three times the second, which rules out the second option. Hence, the answer is 1349.

Q: Why are hydrocarbons insoluble in water? 942 0

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Answer :
Explanation :

We know that polar substances are soluble in polar solvents and non polar substances are soluble in non-polar solvents only. Here the hydrocarbons are non-polar molecular substances and water is a polar solvent. So water can't dissolve hydrocabons.   Hence, as hydrocarbons are non-polar substances, they are insoluble in water as it is a highly polar solvent.

Q: A certain amount earns simple interest of Rs. 2260 after 3 years. Had the interest been 1 % more how much more interest would it have earned ? 942 0

  • 1
    Rs. 175
    Correct
    Wrong
  • 2
    Rs. 220.75
    Correct
    Wrong
  • 3
    Rs. 126
    Correct
    Wrong
  • 4
    Can't be determined
    Correct
    Wrong
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Answer : 4. "Can't be determined"
Explanation :

Answer: D) Can't be determined Explanation: Here given Interest earned = Rs. 2260 Time = 3 years Rate of interest = ? Principal Amount = ? So, it can't be determined.

Q: One-third of the boys and one-half of the girls of a college participated in a sport. If the number of participating students is 300, out of which 100 are boys. What is the total number of students in the college ? 942 0

  • 1
    550
    Correct
    Wrong
  • 2
    575
    Correct
    Wrong
  • 3
    625
    Correct
    Wrong
  • 4
    700
    Correct
    Wrong
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Answer : 4. "700"
Explanation :

Answer: D) 700 Explanation: Let number of boys = B Number of girls = G From the given data, 1B/3 + 1G/2 = 300 But given B/3 = 100 => B = 300 G/2 = 300 - 100 G = 200 x 2 => G = 400 Therefore, total number of students in the college = B + G = 700.

Q: Which of the following is the strongest acid? 941 0

  • 1
    ClCH2COOH
    Correct
    Wrong
  • 2
    BrCH2COOH
    Correct
    Wrong
  • 3
    FCH2COOH
    Correct
    Wrong
  • 4
    ICH2COOH
    Correct
    Wrong
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Answer : 3. "FCH2COOH"
Explanation :

Answer: C) FCH2COOH Explanation: FCH2COOH is the strongest acid out of all .Since the electron withdrawing inductive effect (-I effect) of the halogens decreases in the order   F>Cl> Br> I , therefore the acidic strength of the α- halo acids decreases in the same order.   FCH2COOH  >  ClCH2COOH   >   BrCH2COOH   >   ICH2COOH.

Q: Who has been appointed as the first woman Secretary General of the Lok Sabha? 941 0

  • 1
    Rama Devi
    Correct
    Wrong
  • 2
    Sumitra Mahajan
    Correct
    Wrong
  • 3
    Anupama Kare
    Correct
    Wrong
  • 4
    Snehlata Shrivastava
    Correct
    Wrong
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Answer : 4. "Snehlata Shrivastava"
Explanation :

Answer: D) Snehlata Shrivastava Explanation: Snehlata Shrivastava, appointed as the first woman Secretary General of the Lok Sabha. The appointment was made by Lok Sabha Speaker Sumitra Mahajan. Ms. Shrivastava will replace Anoop Mishra, who retired on November 30, 2017.  Ms. Shrivastava, a senior civil servant with 35 years of rich and varied administrative experience is a 1982 batch IAS officer from the Madhya Pradesh cadre. Rama Devi holds the distinction of the being the first woman secretary general of the Rajya Sabha.

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