IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Compared to land, the open oceans 1655 0

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    are rich in silica and iron
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    are nutrient-poor environments
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    contain unlimited nitrogen
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    are nutrient-rich environments
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उत्तर : 2. "are nutrient-poor environments"
व्याख्या :

Answer: B) are nutrient-poor environments Explanation:

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उत्तर : 4. "Rs.5000"
व्याख्या :

Answer: D) Rs.5000 Explanation: Let a, b and c be the amounts invested in schemes X, Y and Z respectively. Then, As we know: Simple interest (S.I.) = PTR/100 (a × 10 × 1/100) + (b × 12 × 1/100) + (c × 15 × 1/100) = 3200 = 10a + 12b + 15c = 320000 .........(1) Now, c = 240% of b = 12b/5 .........(2) And, c = 150% of a = 3a/2 => a = 2/3 c = (2 × 12)b/(3 × 5) = 8b/5 .......(3) From (1), (2) and (3), we have 16b + 12b + 36b = 320000 => 64b = 320000 => b = 5000 ∴ Sum invested in Scheme Y = Rs.5000.

प्र: In how many different ways can the letters of the word 'ABYSMAL' be arranged ? 1654 0

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    5040
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    3650
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    4150
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    2520
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उत्तर : 4. "2520"
व्याख्या :

Answer: D) 2520 Explanation: Total number of letters in the word ABYSMAL are 7   Number of ways these 7 letters can be arranged are 7! ways   But the letter is repeated and this can be arranged in 2! ways   Total number of ways arranging ABYSMAL = 7!/2! = 5040/2 = 2520 ways.

प्र: How many black cards are in a deck? 1653 0

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    13
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    26
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    39
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    52
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उत्तर : 2. "26"
व्याख्या :

Answer: B) 26 Explanation: The total cards in the deck are 52. These 52 cards are divided into 4 suits of 13 cards in each suit. Two Red suits and Two black suits. Red suits :: Heart suit and Diamond suit = 26 Black suits :: Spade suit and Club suit = 26.

प्र: How many seconds will a 800 meter long train moving with a speed of 63 km/hr take to cross a man walking with a speed of 3 km/hr in the direction of the train ? 1653 0

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    48
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    52
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    38
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    42
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उत्तर : 1. "48"
व्याख्या :

Answer: A) 48 Explanation: Here distance d = 800 mts speed s = 63 - 3 = 60 kmph = 60 x 5/18 m/s time t = 800x1860x5= 48 sec.

प्र: India's longest cable-bridge inaugurated by PM Modi in which state ? 1652 0

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    Assam
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    Telangana
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    Gujarat
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    Karnataka
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उत्तर : 3. "Gujarat"
व्याख्या :

Answer: C) Gujarat Explanation: PM Modi Inaugurated India's Longest Cable Bridge in Gujarat, a four-lane bridge over the river Narmada in Bharuch. The bridge is 1344 metres long and 22.8 metres wide. It is built by Larsen and Turbo as a part of the Rs. 379 crore project of the National Highway Authority of India.

प्र: The first-ever International MSME Day 2017 has celebrated on which day  ? 1651 0

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    June 27
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    June 23
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    June 26
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    June 28
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उत्तर : 1. "June 27"
व्याख्या :

Answer: A) June 27 Explanation: The International Trade Centre (ITC) has celebrated the first-ever International MSME Day on June 27, 2017 with theme ‘Small business – big impact’. The purpose of the day is to raise public awareness about the importance of MSMEs to economic growth and international development. The Micro, Small and Medium Enterprises (MSME) Day highlights the strong contribution of MSMEs worldwide to livelihoods, communities and economies and the need to support MSMEs towards their success. The ITC is the joint agency of the UN and the WTO supporting SMEs in developing countries and transition economies for sustainable and inclusive trade.

प्र: Cross Contamination is prevented by 1651 0

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उत्तर :
व्याख्या :

Cross Contamination :: Cross Contamination is nothing but a contamination in a cross way i.e, when a bacteria on a kitchen tool transfers to food via direct contact. Two of the most common kitchen tools usually tend to be a knife or a cutting board. However, it is not just bacteria that gets carried from one place to another — it could also be a virus also. Cross Contamination is prevented by the following tips :: 1. Use separate equipment 2. Clean and sanitize all work surfaces 3. Remind employees to wash their hands 4. Purchase prepared food 5. Implement a personal hygiene program.

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