IIT JEE Practice Question and Answer

Q: Which choice best describes the polarity of BrF5? 1837 0

  • 1
    nonpolar bonds / nonpolar molecule
    Correct
    Wrong
  • 2
    nonpolar bonds / polar molecule
    Correct
    Wrong
  • 3
    polar bonds / polar molecule
    Correct
    Wrong
  • 4
    polar bonds / nonpolar molecule
    Correct
    Wrong
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Answer : 3. "polar bonds / polar molecule"
Explanation :

Answer: C) polar bonds / polar molecule Explanation:

Q: Compound interest on a certain sum of money at 20% per annum for 2 years is Rs.5995. What is the SI on the same money at 8% per annum for 6 years ? 1837 0

  • 1
    Rs. 5989
    Correct
    Wrong
  • 2
    Rs. 6540
    Correct
    Wrong
  • 3
    Rs. 7844
    Correct
    Wrong
  • 4
    Rs. 6789
    Correct
    Wrong
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Answer : 2. "Rs. 6540"
Explanation :

Answer: B) Rs. 6540 Explanation: Given C.I = 5984, R = 20% , T = 2yrs  C.I = P1+201002-1   5984 =    => P = (5995x25)/11   P = Rs. 13625   Now S.I = PTR/100   SI = (13625 x 8 x 6)/100 = Rs. 6540

Q: What is the primary reason to issue stock? 1836 0

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Answer :
Explanation :

The primary reason to issue stock is to raise money to start and maintain an ongoing business. Other Reasons:: The reasons that a company might want to raise money by issuing stock are:   To develop new products   To buy more advanced equipment   To pay for new buildings and inventories   To hire more employees   To provide for a merger or acquisition   To decrease debt   To give company owners greater flexibility   To place a value on the company.

Q: Khushi bought the bangles of equal number of Rs. 34 per piece, Rs. 42 per piece and Rs. 6 per piece. She spends total Rs. 1722 on all types of bangles. How many bangles did she buy of each type  ? 1836 0

  • 1
    27
    Correct
    Wrong
  • 2
    13
    Correct
    Wrong
  • 3
    17
    Correct
    Wrong
  • 4
    21
    Correct
    Wrong
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Answer : 4. "21"
Explanation :

Answer: D) 21 Explanation: Let number of bangles kushi purchase of each type = x From the given data, 34x + 42x + 6x = 1722 x = 1722/82 = 21.

Q: Find the next number in the following number series? 410, 409, 413, 404, ? 1835 0

  • 1
    412
    Correct
    Wrong
  • 2
    415
    Correct
    Wrong
  • 3
    418
    Correct
    Wrong
  • 4
    420
    Correct
    Wrong
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Answer : 4. "420"
Explanation :

Answer: D) 420 Explanation: The given number series 410, 409, 413, 404, ? , follows a pattern that  410 410 - 13 = 409409 + 22 = 413413 - 33 = 404404 + 42 = 420   Hence, the next number in the given series is 420.

Q: CTRL + ] is used for 1835 0

  • 1
    Re-do
    Correct
    Wrong
  • 2
    Right align text
    Correct
    Wrong
  • 3
    Increase in font size
    Correct
    Wrong
  • 4
    Expand or collapse the ribbon
    Correct
    Wrong
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Answer : 3. "Increase in font size"
Explanation :

Answer: C) Increase in font size Explanation: CTRL + ] is a computer shortcut and is used for Increase in font size.   Shortcuts : Re-do ---- Ctrl + Y Right align text ---- Ctrl + R Expand or collapse the ribbon ---- Ctrl + F1

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Answer :
Explanation :

Let the present age's of mother be 'M' and that of her son be 'S'. According to the given data in the question, M - 5 = 3(S - 5) F - 3S = -10  ...............(1) Then given , M + 5 : S + 5 = 11 : 5  => 5M - 11S = 30 ..............(2)   From (1) & (2), we get S = 20 Then by substituting S = 20 in (1) or (2), we get M = 50.   Hence, the present age of mother is M = 50 years.

Q: The cotton gin was an important invention because 1835 0

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Answer :
Explanation :

Cotton Gin was invented by Eli Whitney in 1793, which is used to separate cotton seeds from cotton fiber.   Hence, it was an important invention because it dramatically reduced the amount of time it took to separate cotton seeds from cotton fiber.

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