IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: KYC norms for e-wallets made mandatory from 1646 0

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    March 31
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    March 1
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    April 1
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    May 1
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उत्तर : 2. "March 1"
व्याख्या :

Answer: B) March 1 Explanation:

प्र: Which phase change is an example of an exothermic process? 1646 0

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    Liquid to Solid
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    Gas to Solid
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    Gas to Liquid
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    All the above
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उत्तर : 4. "All the above"
व्याख्या :

Answer: D) All the above Explanation: Processes that require or give off heat will be limited to changes of state, known as phase changes, and changes in chemical constitution, or chemical reactions. Changes of state involve a solid melting, a liquid freezing, a liquid boiling or a gas condensing.   An exothermic process is one that gives off heat, which is transferred to the surroundings. An endothermic process is a reaction which heat has to be supplied to the system from the surroundings.   Here in all the given options, heat is taken away from them to change there phase.  Liquid to Solid --- Freezing Gas to Liquid --- Condensation Gas to Solid --- Deposition  are all examples of exothermic processes.

प्र: The yield to maturity on a discount bond is 1646 0

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    equal to both the coupon rate / current yeild
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    less than the current yeild but greater than the coupon rate
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    greater than both the coupon rate / current yeild
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    equal to the current yeild but greater than the coupon rate
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उत्तर : 1. "equal to both the coupon rate / current yeild"
व्याख्या :

Answer: A) equal to both the coupon rate / current yeild Explanation: Yield to maturity is a concept for fixed rate bonds and is the internal rate of return i.e. the rate at which future flows are discounted on a compound basis to give the present value of the bond including accrued interest.

प्र: The world's tallest twisted tower is ? 1645 0

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    Tokyo Sky Tree
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    BREN Tower
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    Burj Khalifa
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    Infinity Tower
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उत्तर : 4. "Infinity Tower"
व्याख्या :

Answer: D) Infinity Tower Explanation: The world's tallest twisted tower, the Infinity Tower was launched in Dubai Marina on 10 June 2013.

प्र: What is the shortest phase of the cell cycle? 1645 0

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    M
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    G1
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    S
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    G2
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उत्तर : 1. "M"
व्याख्या :

Answer: A) M Explanation: Longest and shortest phases Of cell cycle: Shortest Phase - M phase or Mitotic phase. Longest phase - G1 phase of the Interphase Longest and shortest phases During Mitosis:Longest Phase - Prophase Shortest Phase - Anaphase

प्र: Who has been appointed as the Election Commissioner of India  ? 1644 0

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    S. Y. Quraishi
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    Sunil Arora
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    H. S. Brahma
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    Nasim Zaidi
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उत्तर : 2. "Sunil Arora"
व्याख्या :

Answer: B) Sunil Arora Explanation:

प्र: Watson bought a book for Rs. 240 and sold to Johny at a profit  of 50%. Johny wants to sell this book to Shekar so that he earns a profit of 25%. But Shekar is adamant at buying this book at a discount of 10%. What marked price should Johny quote to Shekar so as to achieve desired profit ? 1644 0

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    Rs. 450
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    Rs. 360
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    Rs. 415
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    Rs. 500
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उत्तर : 4. "Rs. 500"
व्याख्या :

Answer: D) Rs. 500 Explanation: Watson bought the book for Rs. 240 and sold to Johny at a profit of 50%. S.P = C.P(1 + P%/100) => S.P for Watson = C.P for Johny = 240(1 + 50/100) = 240 x 1.5 = Rs. 360 Let Johny quoted the marked price of the book as Rs. M We know, SP = M.P(1 - Discount(%)/100) Here discount = 10% to Shekar, S.P for Johny = M(1 - 10/100) = 0.9M But Johny want to earn 25% profit, => S.P = C.P(1 + P%/100) => 0.9M = 360(1 + 25/100) => M = (360x1.25)/0.9 => M = Rs. 500 Therefore, Johny should quote Rs. 500 as the marked price of the book to get 25% profit and allowing 10% discount to Shekar.

प्र: Vision can be affected by drugs and alcohol making, especially difficult to distinguish 1644 0

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    Light
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    Colors
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उत्तर : 2. "Colors"
व्याख्या :

Answer: B) Colors Explanation: Drinking alcohol can cause many damages to your body. Your vision can be affected as you will face blurred and double vision and even you can't identify colors.

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