IIT JEE Practice Question and Answer

Q: The angle between the minute hand and the hour hand of a clock when the time is 4.15 is 1077 0

  • 1
    0
    Correct
    Wrong
  • 2
    37.5
    Correct
    Wrong
  • 3
    27
    Correct
    Wrong
  • 4
    15
    Correct
    Wrong
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Answer : 2. "37.5"
Explanation :

Answer: B) 37.5 Explanation: Angle between hands of a clock   When the minute hand is behind the hour hand, the angle between the two hands at M minutes past H 'o clock   => 30H-M5+M2 degrees   Here H = 4, M = 15 and the minute hand is behind the hour hand.   Hence the angle    = 30[4-(15/5)]+15/2 = 30(1)+7.5 = 37.5 degrees

Q: Shares of a company given in exchange for work done are called ? 1077 0

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    Secondary shares
    Correct
    Wrong
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    Hot equity
    Correct
    Wrong
  • 3
    Preferential shares
    Correct
    Wrong
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    Sweat equity shares
    Correct
    Wrong
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Answer : 4. "Sweat equity shares"
Explanation :

Answer: D) Sweat equity shares Explanation: A sweat equity share is an equity share issued by the company to employees or directors at a discount or for consideration other than cash for providing know-how or making available rights in the nature of intellectual property rights or value additions.

Q: Who had announced that democracy is a government " of the people, by the people and for the people " ? 1076 0

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    Abraham Lincoln
    Correct
    Wrong
  • 2
    George Washignton
    Correct
    Wrong
  • 3
    Theodore Roosevelt
    Correct
    Wrong
  • 4
    Winston Churchill
    Correct
    Wrong
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Answer : 1. "Abraham Lincoln"
Explanation :

Answer: A) Abraham Lincoln Explanation:

Q: At what temperature (in Fahrenheit) pure water freezes? 1076 0

  • 1
    0
    Correct
    Wrong
  • 2
    17
    Correct
    Wrong
  • 3
    32
    Correct
    Wrong
  • 4
    39
    Correct
    Wrong
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Answer : 3. "32"
Explanation :

Answer: C) 32 Explanation: 32oFWe know that T(°F) = T(°C) × 1.8 + 3232(°F) = 0(°C)

Q: The wavelength of a wave is the distance between 1075 0

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    Crest and Trough
    Correct
    Wrong
  • 2
    Crest and Crest
    Correct
    Wrong
  • 3
    Trough and Trough
    Correct
    Wrong
  • 4
    Both B & C
    Correct
    Wrong
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Answer : 4. "Both B & C"
Explanation :

Answer: D) Both B & C Explanation: Distance between two Consecutive Crests or two Consecutive Troughs is called Wavelength. But the distance between crest and adjacent trough is half the wavelength. That is the distance between adjacent crest and trough is called Half the wavelength.

Q: First woman to win olympic medal for India 1074 0

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    Mary Kom
    Correct
    Wrong
  • 2
    Saina Nehwal
    Correct
    Wrong
  • 3
    Karnam Malleshwari
    Correct
    Wrong
  • 4
    P.V. Sindhu
    Correct
    Wrong
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Answer : 3. "Karnam Malleshwari"
Explanation :

Answer: C) Karnam Malleshwari Explanation: The first Indian woman to ever win an Olympic medal for India was Karnam Malleswari who won a bronze medal at the Sydney Olympics 2000 in the Women's 69 kg category in Weightlifting.   Karnam Malleswari is a retired Indian weightlifter. In 1995 she received the Rajiv Gandhi Khel Ratna, India's highest sporting honour, and in 1999 the civilian Padma Shri award.   After that Indian women who won Olymic medals to India was :    1. Mary Kom at the London 2012 Summer Olympics won bronze medal in women's boxing.   2. Saina Nehwal was the first Indian to win a medal in Badminton at the Olympics, by winning the Bronze medal at the London Olympics 2012.   3. Sakshi Malik became the first Indian woman to win a medal in Wrestling. She won the Bronze medal in Women's 58 kg freestyle wrestling in 2016 Summer Olympics held in Rio.   4. P.V. Sindhu became the first ever Indian woman to win the Silver medal at the Olympics, by reaching the Badminton final at Rio Olympics 2016.

Q: What are the Monomers that make up Proteins? 1074 0

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    Amino acids
    Correct
    Wrong
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    Nucleotides
    Correct
    Wrong
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    Disaccharides
    Correct
    Wrong
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    Chaperones
    Correct
    Wrong
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Answer : 1. "Amino acids"
Explanation :

Answer: A) Amino acids Explanation: Proteins are long chains of Amino acids. That is in brief, Amino acids are the monomers of Proteins. Amino acids are compounds which contain both an amino group and a carboxylic group. Proteins are made up of 20 essential amino acids. Monomer means a small molecule of an organic substance i.e, building block in general.

Q: Intermolecular forces in HCl are 1073 0

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    Hydrogen bonding
    Correct
    Wrong
  • 2
    Dipole-dipole
    Correct
    Wrong
  • 3
    Dispersion force
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: Intermolecular forces : The forces of attraction present in between the molecules or atoms or compounds is termed as intermolecular forces. The molecule HCl is composed of hydrogen and chlorine atom. There is high difference in electronegativities therefore, it is polar in nature. The H end of HCl is permanently slightly positive charge. The Cl end of HCl has a permanent slight negative charge. the "H" in one molecule is attracted to the "Cl" in a neighbor. The intermolecular force is weak compared to a covalent bond. But this dipole-dipole interaction is one of the stronger intermolecular attractions. It also has hydrogen bonding and dispersion forces.  Dispersion forces are the weakest forces which are present in between all molecules or atoms.Hydrogen bonds are present in molecules having at least one H-A bond where A is the strong electronegative atom (mainly F, Cl and N).

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