IIT JEE Practice Question and Answer

Q: What gets wetter and wetter the more it dries? 2028 0

  • 1
    Soap
    Correct
    Wrong
  • 2
    Towel
    Correct
    Wrong
  • 3
    Clothes
    Correct
    Wrong
  • 4
    Sponge
    Correct
    Wrong
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Answer : 2. "Towel"
Explanation :

Answer: B) Towel Explanation: Towel gets wetter and wetter the more it dries because we use that towel which is dried after used.

Q: Which of these is NOT a lipid? 2028 0

  • 1
    Wax
    Correct
    Wrong
  • 2
    Cholesterol
    Correct
    Wrong
  • 3
    RNA
    Correct
    Wrong
  • 4
    Phospholipid
    Correct
    Wrong
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Answer : 3. "RNA"
Explanation :

Answer: C) RNA Explanation: RNA is not a lipid among the given options.   A lipid is a substance of biological origin that is soluble in nonpolar solvents. It comprises a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, and phospholipids.

Q: Which of these was a goal of unions? 2027 0

  • 1
    union ownership of business
    Correct
    Wrong
  • 2
    government ownership of business
    Correct
    Wrong
  • 3
    a shorter workweek
    Correct
    Wrong
  • 4
    government reform
    Correct
    Wrong
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Answer : 3. "a shorter workweek"
Explanation :

Answer: C) a shorter workweek Explanation: Labor unions are associations of workers who pursue common objectives. Workers use this platform to bargain collectively on behalf of the majority of workers.

Q: Find the odd term from the given series of numbers  ? 125, 127, 130, 135, 142, 153, 165 ? 2026 0

  • 1
    153
    Correct
    Wrong
  • 2
    165
    Correct
    Wrong
  • 3
    142
    Correct
    Wrong
  • 4
    127
    Correct
    Wrong
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Answer : 2. "165"
Explanation :

Answer: B) 165 Explanation: From the beginning, the next term comes by adding prime numbers in a sequence of 2, 3, 5, 7, 9, 11, 13... to its previous term. But 165 will not be in the series as it must be replaced by 166 since 153+13 = 166.

Q: The missing number in the Series 114, 131, 165, 216,  ?, 369 2025 0

  • 1
    314
    Correct
    Wrong
  • 2
    304
    Correct
    Wrong
  • 3
    294
    Correct
    Wrong
  • 4
    284
    Correct
    Wrong
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Answer : 4. "284"
Explanation :

Answer: D) 284 Explanation: 114       131     165     216     ?      369    +17      +34     +51     +68    +85   => The missing number in the given Number series = 216 + 68 = 284.

Q: Express 6.72 % in ratio ? 2025 0

  • 1
    65 : 124
    Correct
    Wrong
  • 2
    42 : 625
    Correct
    Wrong
  • 3
    21 : 125
    Correct
    Wrong
  • 4
    37 : 442
    Correct
    Wrong
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Answer : 2. "42 : 625"
Explanation :

Answer: B) 42 : 625 Explanation: 6.72/100 = 672/10000 = 42/625

Q: Under which conditions are gases most soluble in water? 2025 0

  • 1
    low pressure and low temperature
    Correct
    Wrong
  • 2
    low pressure and high temperature
    Correct
    Wrong
  • 3
    high pressure and low temperature
    Correct
    Wrong
  • 4
    high pressure and high temperature
    Correct
    Wrong
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Answer : 3. "high pressure and low temperature"
Explanation :

Answer: C) high pressure and low temperature Explanation: Henry's Law tells that the solubility of a gas is directly proportional to the partial pressure of the gas above the solvent. Hence under high pressure, more gas is dissolved. Also that Henry's Law involves a constant which is temperature-dependent. Under high temperatures, less gas is dissolved whereas under low temperatures, more gas is dissolved.   For Example ::   You can think of a can of soda. The contents are under pressure and if you shake the can before opening, the soda fizzes out all over as you open it. So the higher the pressure, the more gas or more CO2 can be dissolved in the drink. Eliminate choices 1 and 2. Now focus on the temperature. Soda goes flat (loses carbonation or gas) as it warms up. Soda is usually served cold because more of the carbonation or CO2 stays in the drink when the soda is cold.   Hence, in high pressure and low temperature conditions gases are most soluble in water.

Q: A calorie is another term for carbohydrate. 2024 0

  • 1
    TRUE
    Correct
    Wrong
  • 2
    FALSE
    Correct
    Wrong
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Answer : 2. "FALSE"
Explanation :

Answer: B) FALSE Explanation: The given statement that a calorie is another term for carbohydrate is False.   Carbohydrates are one of the main types of nutrients, and are most important source of energy.   Where as Calorie is a measurement of how much heat energy is generated by the body processing food.   Your digestive system changes carbohydrates into glucose(blood sugar). Your body uses this sugar for energy.

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