IIT JEE Practice Question and Answer

Q: Area of a square and a rectangle are equal. If side of the square is 40 cm and length of the rectangle is 64 cm, what is the perimeter of the rectangle ? 1341 0

  • 1
    187 cm
    Correct
    Wrong
  • 2
    178 cm
    Correct
    Wrong
  • 3
    149 cm
    Correct
    Wrong
  • 4
    194 cm
    Correct
    Wrong
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Answer : 2. "178 cm"
Explanation :

Answer: B) 178 cm Explanation: Area of square = 40 x 40 = 1600 sq.cm Given that the areas of Square and Rectangle are equal => Area of rectangle = 1600 Sq.cm We know that, Area of rectangle = L x B Given L = 64 cm Breadth of rectangle = 1600/64 = 25 cm Perimeter of the rectangle = 2(L + B) = 2(64+25) = 178 cm.

Q: What is the first thing that alcohol effects? 1340 0

  • 1
    Judgement
    Correct
    Wrong
  • 2
    Speech
    Correct
    Wrong
  • 3
    Vision
    Correct
    Wrong
  • 4
    Balance
    Correct
    Wrong
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Answer : 1. "Judgement"
Explanation :

Answer: A) Judgement Explanation: Alcohol impairs your judgement. Judgement is in your brain stupid and it impairs your brain.

Q: Which is called 'OFF State' in binary? 1340 0

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

Answer: D) 1 Explanation: '0' is called OFF State in Binary...

Q: Which country has been ranked number one in pollution related deaths ? 1340 0

  • 1
    Australia
    Correct
    Wrong
  • 2
    Indonesia
    Correct
    Wrong
  • 3
    India
    Correct
    Wrong
  • 4
    Japan
    Correct
    Wrong
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Answer : 3. "India"
Explanation :

Answer: C) India Explanation:

Q: "International Day for Disaster Reduction" was observed across the world on _____ ? 1340 0

  • 1
    16 October
    Correct
    Wrong
  • 2
    15 October
    Correct
    Wrong
  • 3
    14 October
    Correct
    Wrong
  • 4
    13 October
    Correct
    Wrong
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Answer : 4. "13 October"
Explanation :

Answer: D) 13 October Explanation: International Day for Disaster Reduction, held every 13 October, celebrates how people and communities around the world are reducing their exposure to disasters. The year 2017 focus is : Reducing the number of affected people by disasters by 2030.

Q: What gas makes up most of the atmosphere? 1339 0

  • 1
    Oxygen
    Correct
    Wrong
  • 2
    Helium
    Correct
    Wrong
  • 3
    Nitrogen
    Correct
    Wrong
  • 4
    Carbondioxide
    Correct
    Wrong
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Answer : 3. "Nitrogen"
Explanation :

Answer: C) Nitrogen Explanation: Our atmosphere is made up of 78% Nitrogen, 21% Oxygen and 1% all other gases like argon, carbon dioxide, neon, and helium.   So, Nitrogen makes up the majority of our atmosphere.

Q: Which of the following is the strongest acid? 1339 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: Simplify the following expression? 40% of (244 x ?) = 48 1338 0

  • 1
    24
    Correct
    Wrong
  • 2
    22
    Correct
    Wrong
  • 3
    20
    Correct
    Wrong
  • 4
    18
    Correct
    Wrong
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Answer : 3. "20"
Explanation :

Answer: C) 20 Explanation: We know that  40% = 40100 = 25⇒25 x 244 x ? = 48? = 48 x 5 x 42 x 24 = 20

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