IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Shivanasamudra Falls is situated on the bank of ______ river ? 1583 0

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    Indus
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  • 2
    Kaveri
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  • 3
    Ganga
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  • 4
    Brahmaputra
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उत्तर : 2. "Kaveri"
व्याख्या :

Answer: B) Kaveri Explanation: Shivanasamudra is a famous waterfall situated in Mandya District of Karnataka State.  Gaganachukki and Barachukki Falls are collectively called as Shivanasamudra Falls.

प्र: Havana is the capital city of 1582 0

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    Suriname
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    Belgium
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    Greece
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    Cuba
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उत्तर : 4. "Cuba"
व्याख्या :

Answer: D) Cuba Explanation: Havana is the capital city of Cuba. It's currency is Cuban Peso.

प्र: Old name of Mahabharata? 1582 0

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    Jai Samhitha
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    Vrahat Katha
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    Rajatarangini
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  • 4
    Saritsagar Katha
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उत्तर : 1. "Jai Samhitha"
व्याख्या :

Answer: A) Jai Samhitha Explanation: How the name changed has so many stories. One of them is In the beginning, Mahabharata has 8800 Slokas and after that it reached to 24000 Slokas. And then it was named as The Great Bharata i.e, Mahabharata.

प्र: The amount of water vapor in the air is 1581 0

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    Hot air
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    Humidity
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    Dew
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    Foam
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उत्तर : 2. "Humidity"
व्याख्या :

Answer: B) Humidity Explanation: The amount of water vapor ranges from a trace amount up to 4% of the mass of air. Water vapor exists as an invisible gas in the air.   The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity. The maximum amount of water vapor that can be in the air depends on the air temperature.

प्र: How many three digit numbers 'abc' are formed where two of the three digits are same ? 1581 0

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    252
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    648
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    243
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    900
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उत्तर : 3. "243"
व्याख्या :

Answer: C) 243 Explanation: Digits are 0,1,2,3,4,5,6,7,8,9. So no. of digits are 10   First all possible case => 9(0 excluded) x 10 x 10 = 900   Second no repetition allowed =>9 x 9 x 8 = 648   Third all digits are same => 9 (111,222,333,444,555,666,777,888,999)   Three digit numbers where two of the three digits are same = 900 - 648 - 9 = 243 ;

प्र: Which country has successfully launched the world's smallest rocket to carry tiny satellite into orbit? 1581 0

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    India
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    Russia
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  • 3
    Japan
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    Australia
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उत्तर : 3. "Japan"
व्याख्या :

Answer: C) Japan Explanation: Japan's - Japan Aerospace Exploration Agency (JAXA) has successfully launched the world's smallest rocket with the ability to put a tiny satellite into orbit. Rocket -  SS-520 which was pnce failed in 2017 lifted off from the Space Center carrying a microsatellite TRICOM-1R, a three-unit CubeSat weighing about 3 kilograms. The CubeSat will now be used to collect images of the Earth's surface via multiple cameras.

प्र: Prokaryotic cells lack 1581 0

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    Membrane bound by organelles
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    Nucleolus
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    Nuclear membrane
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    All the above
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उत्तर : 4. "All the above"
व्याख्या :

Answer: D) All the above Explanation: Prokaryotic cells lack a nucleus and do not have an extensive system of interior membranes. They are encased in a cell wall and many contain external structures such as a capsule, flagellum, or pili. Prokaryotes – have a relatively uniform interior that is not subdivided by internal membranes.

प्र: Twelve children take sixteen days to complete a work which can be completed by 8 adults in 12 days. After working for 3 days, sixteen adults left and six adults and four children joined them. How many days will they take to complete the remaining work ? 1580 0

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    3 days
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    2 days
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    6 days
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  • 4
    12 days
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उत्तर : 3. "6 days"
व्याख्या :

Answer: C) 6 days Explanation: From the given data, 12 children 16 days work,One child’s one day work = 1/192. 8 adults 12 days work,One adult’s one day’s work = 1/96. Work done in 3 days = ((1/96) x 16 x 3) = 1/2 Remaining work = 1 – 1/2 = 1/2 (6 adults+ 4 children)’s 1 day’s work = 6/96 + 4/192 = 1/12 1/12 work is done by them in 1 day. 1/2 work is done by them in 12 x (1/2) = 6 days.

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