IIT JEE Practice Question and Answer

Q: Which of the following is not a pure substance? 2150 0

  • 1
    Oxygen
    Correct
    Wrong
  • 2
    Carbon dioxide
    Correct
    Wrong
  • 3
    Water
    Correct
    Wrong
  • 4
    Milk
    Correct
    Wrong
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Answer : 4. "Milk"
Explanation :

Answer: D) Milk Explanation: Milk is not a pure substance since it has so many constituents that can be separated physically. Compounds are pure substances formed from elements unlike mixtures.

Q: Lethargic : Vital :: Trite : ? 8328 0

  • 1
    Unique
    Correct
    Wrong
  • 2
    Slug
    Correct
    Wrong
  • 3
    Lazy
    Correct
    Wrong
  • 4
    Skinny
    Correct
    Wrong
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Answer : 1. "Unique"
Explanation :

Answer: A) Unique Explanation: Lethargic means "sluggish", kind of inactive Vital means full of energy, lively So, they are antonyms. So, for the 2nd part of the analogy, you are looking for a antonym to trite Trite means lacking originality or freshness. Overused. Kind of like a cliche So, an antonym could be original, unique, innovative.

Q: Which color has the highest frequency? 1421 0

  • 1
    Violet
    Correct
    Wrong
  • 2
    Red
    Correct
    Wrong
  • 3
    Indigo
    Correct
    Wrong
  • 4
    Green
    Correct
    Wrong
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Answer : 1. "Violet"
Explanation :

Answer: A) Violet Explanation: In VIBGYOR. It has colors ordered from highest to lowest frequency.                 Violet > Indigo > Blue > Green > Yellow > Orange > Red   That says Violet has the highest frequency. We know, Speed of light = Frequency x Wavelength => As frequeny is inversely proportional to wavelength i.e, as frequwncy goes high wavelength goes down.   So, the violet color has the highest frequency.

Q: Is Nitrogen an Inert gas? 1751 0

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

Answer: B) FALSE Explanation: Nitrogen is found as a diatomic molecule (N2) in nature. There is a triple bond between the two nitrogen atoms.   The triple bond is pretty strong. Therefore, it needs a lot of energy to break those bonds and participate in a reaction. So nitrogen is commonly referred to as and used as an inert gas (high abundance & low cost.) However, it’s not truly inert like most noble gases. Nitrogen does react if the conditions are met. But those conditions are not exactly mild, but are not as extreme as for noble gases.   It forms nitric oxide and nitrogen dioxide with oxygen, ammonia with hydrogen, and nitrogen sulfide with sulfur.

Q: Rotate : Energy :: Stop : ? 4757 0

  • 1
    Spin
    Correct
    Wrong
  • 2
    Break
    Correct
    Wrong
  • 3
    Inertia
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 3. "Inertia"
Explanation :

Answer: C) Inertia Explanation: To rotate is to energy to stop is to inertia. From the definition itself we know that inertia is a property by virtue of which a body continues to be in the state of rest or in state of motion. So over here whenever energy is supplied then the body starts to move that is a displacement is there and it is rotating where as whenever the body is stopped an inertia of rest is created.   So, Rotate : Energy :: Stop : Inertia.

Q: What sugar is found in RNA? 2144 0

  • 1
    Deoxyribose
    Correct
    Wrong
  • 2
    Ribose
    Correct
    Wrong
  • 3
    Pentose
    Correct
    Wrong
  • 4
    Sucrose
    Correct
    Wrong
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Answer : 2. "Ribose"
Explanation :

Answer: B) Ribose Explanation: RNA - ribonucleic acid is a type of nucleic acid. The sugar contained in it is called Ribose.

Q: Internal controls are concerned with 1557 0

  • 1
    the extent of government regulations
    Correct
    Wrong
  • 2
    preparing income tax returns
    Correct
    Wrong
  • 3
    safeguarding assets
    Correct
    Wrong
  • 4
    only manual systems of accounting
    Correct
    Wrong
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Answer : 3. "safeguarding assets"
Explanation :

Answer: C) safeguarding assets Explanation: Internal control, as defined in accounting and auditing, is a process for assuring achievement of an organization's objectives in operational effectiveness and efficiency, reliable financial reporting, and compliance with laws, regulations and policies. A broad concept, internal control involves everything that controls risks to an organization.   Internal control is all of the policies and procedures management uses to achieve the following goals. Safeguard University assets - well designed internal controls protect assets from accidental loss or loss from fraud.   Ensure the reliability and integrity of financial information - Internal controls ensure that management has accurate, timely and complete information, including accounting records, in order to plan, monitor and report business operations.   Ensure compliance - Internal controls help to ensure the University is in compliance with the many federal, state and local laws and regulations affecting the operations of our business.   Promote efficient and effective operations - Internal controls provide an environment in which managers and staff can maximize the efficiency and effectiveness of their operations.   Accomplishment of goals and objectives - Internal controls system provide a mechanism for management to monitor the achievement of operational goals and objectives.   Hence, Internal controls are concerned with safeguarding assets.

Q: In which of the following organelles does photosynthesis take place? 1779 0

  • 1
    Miochondria
    Correct
    Wrong
  • 2
    Chloroplast
    Correct
    Wrong
  • 3
    Central Vacuole
    Correct
    Wrong
  • 4
    Ribosome
    Correct
    Wrong
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Answer : 2. "Chloroplast"
Explanation :

Answer: B) Chloroplast Explanation: Chloroplasts use energy from light to transform carbon dioxide and water into sugar and oxygen. A green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes.

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