IIT JEE प्रश्न और उत्तर का अभ्यास करें

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

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    Oxygen
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    Carbon dioxide
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    Water
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    Milk
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उत्तर : 4. "Milk"
व्याख्या :

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.

प्र: Lethargic : Vital :: Trite : ? 8328 0

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    Unique
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    Slug
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    Lazy
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    Skinny
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उत्तर : 1. "Unique"
व्याख्या :

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.

प्र: Which color has the highest frequency? 1421 0

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    Violet
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    Red
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    Indigo
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    Green
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उत्तर : 1. "Violet"
व्याख्या :

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.

प्र: Is Nitrogen an Inert gas? 1751 0

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    TRUE
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    FALSE
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उत्तर : 2. "FALSE"
व्याख्या :

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.

प्र: Rotate : Energy :: Stop : ? 4757 0

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    Spin
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    Break
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    Inertia
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    None
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उत्तर : 3. "Inertia"
व्याख्या :

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.

प्र: What sugar is found in RNA? 2144 0

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    Deoxyribose
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    Ribose
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    Pentose
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    Sucrose
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उत्तर : 2. "Ribose"
व्याख्या :

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

प्र: Internal controls are concerned with 1557 0

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    the extent of government regulations
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    preparing income tax returns
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    safeguarding assets
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    only manual systems of accounting
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उत्तर : 3. "safeguarding assets"
व्याख्या :

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.

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

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    Miochondria
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    Chloroplast
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    Central Vacuole
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    Ribosome
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उत्तर : 2. "Chloroplast"
व्याख्या :

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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