IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Which of the following is not a compound? 1757 0

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    Brass
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    Quick lime
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    Marble
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    गलत
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    Soda ash
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उत्तर : 1. "Brass"
व्याख्या :

Answer: A) Brass Explanation: Among the given options Brass is not a compound. Since it is an alloy, it is a mixture.    The smallest part of a compound is called a molecule. It has a unique composition that is always the same. Compound is a substance that consists of two or more elements.

प्र: Breeding and management of bees is called 2264 0

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    Pisciculture
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    Sericulture
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    Silviculture
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    Apiculture
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उत्तर : 4. "Apiculture"
व्याख्या :

Answer: D) Apiculture Explanation: Breeding and management of bees is called Apiculture.   A beekeeper or apiarist keeps bees in order to collect their honey and other products that the hive produces (including beeswax, propolis, flower pollen, bee pollen, and royal jelly), to pollinate crops, or to produce bees for sale to other beekeepers. A location where bees are kept is called an 'apiary' or 'bee yard.'

प्र: What is always coming but never arrives? 1990 0

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उत्तर :
व्याख्या :

It is Tomorrow. It always be tomorrow which represents coming but never arrives.

प्र: Which of the following vitamin helps in clotting of blood? 1500 0

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    Vitamin K
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    Vitamin D
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    Vitamin B1
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    Vitamin B2
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उत्तर : 1. "Vitamin K"
व्याख्या :

Answer: A) Vitamin K Explanation: Vitamin K helps in clotting of blood. It is used by the body to help blood clot.   Warfarin (Coumadin) is used to slow blood clotting. By helping the blood clot, vitamin K might decrease the effectiveness of warfarin (Coumadin).

प्र: Which of the following describes the Urban League? 2654 0

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    focused on helping poor African American workers
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    helped middle-class African Americans struggle for political and social justice
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    formed in response to race riots in 1908
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    led by Jane Addams and Ida B. Wells
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उत्तर : 1. "focused on helping poor African American workers"
व्याख्या :

Answer: A) focused on helping poor African American workers Explanation:

प्र: What was the symbol of death of gautama buddha? 1728 0

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    Stupa
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    Bodhi tree
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    Lion
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    Chaitya
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उत्तर : 1. "Stupa"
व्याख्या :

Answer: A) Stupa Explanation: Stupa represents the symbol of death of Gautama Buddha. On the other hand, Bodhi Tree is the symbol of nirvana of Gautama Buddha.

प्र: Pollination by wind is called 2018 0

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    Hydrophily
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    Entomophily
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    Anemophily
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    Zoophily
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उत्तर : 3. "Anemophily"
व्याख्या :

Answer: C) Anemophily Explanation: Pollination by wind is called Anemophily or Wind pollination. The process of the transfer of pollen from one individual plant to another, whereby the pollen is carried by air currents is called Anemophily.   Almost all gymnosperms (Non-flowering plants) are anemophilous, as are many plants in the order Poales, including grasses, sedges and rushes.

प्र: An electrically charged atom or group of atoms is called 1414 0

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    An ion
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    A meson
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    A electron
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    None of the above
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उत्तर : 1. "An ion"
व्याख्या :

Answer: A) An ion Explanation: An electrically charged atom or group of atoms formed by the loss or gain of one or more electrons is called an Ion. Cation: An ion is a cation (positive ion) if it is created by electron loss and is attracted to the cathode in electrolysis. Anion: An ion is an anion (negative ion) if it is created by an electron gain and is attracted to the anode.   The valence of an ion is equal to the number of electrons lost or gained and is indicated by a plus sign for cations and a minus sign for anions. Ex: Na +, Cl−, Ca ++,...

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