IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Which of the following is a renewable source of energy 1633 0

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    Natural gas
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    Coal
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    Wind
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  • 4
    Oil
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उत्तर : 3. "Wind"
व्याख्या :

Answer: C) Wind Explanation: The energy sources that are constantly being replenished, such as sunlight, wind, and water. This means that we can use them as much as we want, and we do not have to worry about them running out. Additionally, renewable energy sources are usually much more environmentally friendly than fossil fuels. Overall, they release very few chemicals, like carbon dioxide, that can harm the environment. Most of this energy comes from fossil fuels, such as coal, oil, and natural gas. These are nonrenewable energy sources, which means that if we use them all up, we can never get more during our lifetime. Fossil fuels also contribute greatly to global climate change by releasing carbon dioxide into the air when they are burned.

प्र: Why is india called bharat? 1633 0

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उत्तर :
व्याख्या :

The name Bharat is derived from the legendary king Bharat who was ancestor of kauravas and pandavas, son of King Dushyanta and Shakuntala. The name India is derived from the river Sindhu which flows in the north west of the country. The Greeks used to call us Indoi meaning the people of the Indus.

प्र: Express 0.875 and 0.375 as a Fraction. 1631 0

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    3/11 & 7/11
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  • 2
    7/9 & 9/13
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  • 3
    7/8 & 3/8
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    गलत
  • 4
    7/9 & 9/11
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उत्तर : 3. "7/8 & 3/8"
व्याख्या :

Answer: C) 7/8 & 3/8 Explanation: Given 0.875 and 0.375 0.875 :: After decimal point there are 3 digits 875 Now, mutiply and divide 0.875 with 1000 0.875 x 10001000 = 8751000 Now, this can be reduced to fraction 78Therefore, 0.875 as fraction = 78 Similarly, 0.375 ::  After decimal point there are 3 digits 375 Now, mutiply and divide 0.375 with 1000 0.375 x 10001000 = 3751000Now, this can be reduced to fraction 38Therefore, 0.375 as fraction = 38

प्र: Manish completes a work in 20 days. After 8 days Sriram joined the work. In how many days will the work be completed  ? Statements : I. Sriram takes twice the time than Manish to complete the work.II. Sriram completes half the work in 15 days. 1630 0

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    Statement I alone is sufficient to answer the question
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    Statement II alone is sufficient to answer the question
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    Either the statements I & II is sufficient to answer the question
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  • 4
    Neither the statements I & II is sufficient to answer the question
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उत्तर : 3. "Either the statements I & II is sufficient to answer the question"
व्याख्या :

Answer: C) Either the statements I & II is sufficient to answer the question Explanation: From statement I, Time taken by Sriram to complete the work = 40 days From statement II, Time taken by Sriram to complete the wok = 30 days So from both either by statement I or statement II we can find the time to complete the work.

प्र: Which dinosaur is sometimes referred to as the thunder lizard? 1630 0

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    Diplodocus
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    Brontosaurus
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    Arm reptile
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    Cunningham
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उत्तर : 2. "Brontosaurus"
व्याख्या :

Answer: B) Brontosaurus Explanation: Although well known as one of the most iconic dinosaurs, Brontosaurus (the 'thunder lizard') has long been considered misclassified. Since 1903, the scientific community has believed that the genus Brontosaurus was in fact the Apatosaurus.

प्र: A rectangular lawn of dimensions 80 m x 60 m has two roads each 10 m wide running in the middle of the lawn, one parallel to the length and the other parallel to the breadth. What is the cost of traveling the two roads at Rs.3 per sq m ? 1630 0

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    Rs. 3600
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  • 2
    Rs. 3800
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    गलत
  • 3
    Rs. 3900
    सही
    गलत
  • 4
    Rs. 3700
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उत्तर : 3. "Rs. 3900"
व्याख्या :

Answer: C) Rs. 3900 Explanation: Area = (l + b – d) d = (80 + 60 – 10)10 => 1300 sq.mts => 1300 x 3 = Rs.3900

प्र: Who has been appointed as the first woman Secretary General of the Lok Sabha? 1630 0

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    Rama Devi
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  • 2
    Sumitra Mahajan
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  • 3
    Anupama Kare
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  • 4
    Snehlata Shrivastava
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उत्तर : 4. "Snehlata Shrivastava"
व्याख्या :

Answer: D) Snehlata Shrivastava Explanation: Snehlata Shrivastava, appointed as the first woman Secretary General of the Lok Sabha. The appointment was made by Lok Sabha Speaker Sumitra Mahajan. Ms. Shrivastava will replace Anoop Mishra, who retired on November 30, 2017.  Ms. Shrivastava, a senior civil servant with 35 years of rich and varied administrative experience is a 1982 batch IAS officer from the Madhya Pradesh cadre. Rama Devi holds the distinction of the being the first woman secretary general of the Rajya Sabha.

प्र: The main result of aerobic respiration is the 1630 0

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    production of lactic acid as an end product
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    production of ATP from the breakdown of glucose
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    conversion of radiant energy into chemical energy
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  • 4
    storage of energy in a polysaccharide
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उत्तर : 2. "production of ATP from the breakdown of glucose"
व्याख्या :

Answer: B) production of ATP from the breakdown of glucose Explanation: The three steps within the aerobic respiration process are glycolysis, the citric acid cycle, and oxidative phosphorylation. Photosynthesis builds glucose, and what was built in photosynthesis is broken down during aerobic respiration.   Hence, production of ATP from the breakdown of glucose is the main result of aerobic respiration.

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