IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Wild animals are not considered a natural resource. 1823 0

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    TRUE
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    FALSE
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उत्तर : 2. "FALSE"
व्याख्या :

Answer: B) FALSE Explanation: The given statement is False. Wild animals are considered as a natural resource. Natural resources are resources taken from nature to satisfy our needs. These natural resources are: 1) Air 2) Water 3) Soil 4) Plants 5) Animals 6) Minerals 7) Forests 8) Natural Gas 9) Coal 10) Petroleum.

प्र: Cobalt 60 is used for cancer treatment it emmits which rays? 1823 0

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    Alpha
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    Beta
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    Gamma
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    X rays
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उत्तर : 3. "Gamma"
व्याख्या :

Answer: C) Gamma Explanation: Cobalt therapy or cobalt-60 therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer.   Cobalt 60 is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. It is produced artificially in nuclear reactors.

प्र: Which of the Phrases (1), (2), (3) and (4) given below should replace the phrases printed in bold in the sentence to make it grammatically correct.    They claim that their employees are highly committing and disciplined. 1823 0

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    Have been highly committed
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    Have high commitments
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    Are highly committed
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    No correction required
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उत्तर : 3. "Are highly committed"
व्याख्या :

Answer: C) Are highly committed Explanation: As per the rule of adverb, the adverb is followed by the third form of verb.

प्र: Who has been appointed as the new economic affairs secretary in the Union Finance Ministry  ? 1822 0

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    N. K. Sinha
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    Tapan Ray
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    Subhash C. Garg
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    Kirti Singh
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उत्तर : 3. "Subhash C. Garg"
व्याख्या :

Answer: C) Subhash C. Garg Explanation: Subhash C. Garg, a 1983 batch lAS officer of Rajasthan cadre, has been appointed as the new the economic affairs secretary in the Union Finance Ministry. The post fell vacant after Shaktikanta Das retired on May 31, 2017. Currently, Tapan Ray, the corporate affairs secretary, has the additional charge of the economic affairs department. Prior to this appointment, Garg was Executive Director at World Bank for Bangladesh, Bhutan, India and Sri Lanka.

प्र: Tetraethyl lead is used as 1822 0

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    Fire extinguisher
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    Gasoline additive
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    Mosquito repellent
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    Pain killer
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उत्तर : 2. "Gasoline additive"
व्याख्या :

Answer: B) Gasoline additive Explanation: Tetraethyl lead is a highly toxic compound used as a gasoline additive. Tetraethyl lead abbreviated as TEL, is an organo lead compound with the formula (CH3CH2)4Pb. It is a petro-fuel additive which in turn caused increased vehicle performance. This is also used as an antiknock agent in gasoline and jet fuels. Tetraethyl lead is absorbed rapidly by the skin, the lungs, and the gastrointestinal tract. It is converted to triethyl lead, which might be responsible for its toxicity.

प्र: Floridian starch is characteristic energy storage material of which algae? 1822 0

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    Blue green algae
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    Brown algae
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    Red algae
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    Green algae
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उत्तर : 3. "Red algae"
व्याख्या :

Answer: C) Red algae Explanation: The floridian starch is reserve food materials in the red algae or the members of class Rhodophytae. It is a characteristic feature of this group.

प्र: Math Logic Challenge 1821 0

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    23
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    26
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    13
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    29
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उत्तर : 2. "26"
व्याख्या :

Answer: B) 26 Explanation: Let the integer be x. Then,  x2-20x = 156   (x + 6)(x - 26) = 0   x = 26   The integer is 26.

प्र: Can yoy guess the Age of Karthik & Kalyan  ? 1821 0

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    68 & 44
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    64 & 48
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    58 & 54
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    76 & 36
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उत्तर : 2. "64 & 48"
व्याख्या :

Answer: B) 64 & 48 Explanation: Given Karthik + Kalyan = 112 Given that when karthik is at the age of kalyan he is twice of Kalyan's age i.e When he was 48 means Kalyan is at 24 => Present age of Kalyan is 48 And that of Karthik is 112 - 48 = 64

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