IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Yard is to Inch as Quart is to 7645 0

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    Milk
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    Gallon
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    Liquid
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    Ounce
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उत्तर : 4. "Ounce"
व्याख्या :

Answer: D) Ounce Explanation: Yard is to Inch as Quart is to Ounce. Because Yard and Inch are units of measurement Where Yard is larger than Inch i.e, 1 Yard = 36 Inches. So, here Quart and Ounce are also units of measurement where Quart is larger than Ounce i.e, 1 Quart = 32 Ounces. Gallon is not correct because Gallon is larger than Quart and Milk and Liquid are not units of measurement. So, Ounce is correct.

प्र: Fresh grapes contain 60% water, while dry grapes contain 40% water. How many kgs of dry grapes can be obtained by 60 kg of fresh grapes? 3824 0

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    25 kgs
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    30 kgs
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    35 kgs
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    40 kgs
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उत्तर : 4. "40 kgs"
व्याख्या :

Answer: D) 40 kgs Explanation: The fruit content in both the fresh fruit and dry fruit is the same. Let 'p' kgs of dry grapes are obtained from the 60 kgs of fresh grapes   => 60 x 40100 = p x 60100=> p = 40 kgs.   Therefore, 40 kgs of Dry grapes are obtained from 60 kgs of Fresh grapes.

प्र: A motorboat takes half time to cover a certain distance downstream than upstream. What is the ratio between rate of current and rate of boat in still water? 1799 0

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    1 : 3
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    3 : 2
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    2 : 3
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    3 : 1
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उत्तर : 1. "1 : 3"
व्याख्या :

Answer: A) 1 : 3 Explanation: Let the speed of the boat in still water is 'w' Speed of the current is 'c' Let the distance between two places is 'd' According to the question, motorboat takes half time to cover a certain distance downstream than upstream. dw+c = 12dw-c => 2w - 2c = w + c => w = 3c => c : w = 1 : 3   Hence, the ratio between rate of current(c) and rate of boat in still water(w) = 1 : 3

प्र: Which country has successfully launched the world's smallest rocket to carry tiny satellite into orbit? 1591 0

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    India
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    Russia
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    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: Where are the Macronutrients located on a Nutritional Label? 2146 0

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    On the Top
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    On the Right
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    On the Bottom
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    On the Left
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उत्तर : 1. "On the Top"
व्याख्या :

Answer: A) On the Top Explanation: Macronutrients are located on the Top of a Nutritional Label. Macronutrients are essential substances that the body needs to survive and develop. There are 3 main Macronutrients: 1. Fats 2. Proteins (and) 3. Carbohydrates. The nutritional label is an important part of any food package. Since the Macronutrients refer to a list of nutrients that we need daily in a pretty large amount are the most important nutrients to sustain our living, commonly they are written on the top of the Nutrition Labels.

प्र: The First step of Bacterial Replication is 1789 0

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    Pinching of the plasma membrane
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    Separation of daughter cells
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    Attachment of the DNA to the plasma membrane
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    DNA Replication
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उत्तर : 4. "DNA Replication"
व्याख्या :

Answer: D) DNA Replication Explanation: The First step of Bacterial Replication is DNA Replication. DNA must be copied in order to proceed.

प्र: Find the Missing Number Puzzle for the Given 1501 0

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    8
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    16
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    9
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    12
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उत्तर : 3. "9"
व्याख्या :

Answer: C) 9 Explanation: Given   6 = 3 => Number of letters in SIX = 3   12 = 6 => Number of letters in TWELVE = 6   14 = 8 => Number of letters in FOURTEEN = 8   Similarly,   22 = 9 => Number of letters in TWENTY TWO = 9           Therefore, 22 = 9.

प्र: Which of the following equations represents Photosynthesis? 2628 0

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    6CO2 + 6H2O -----> C6H12O6 + 6O2
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    C6H12O6 + 6O2 -----> CO2 + 6H2O
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    CO2 + H2O -----> C6H12O6 + 6O2
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    6O2 + 6H2O -----> C6H12O6 + 6CO2
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उत्तर : 1. "6CO2 + 6H2O -----> C6H12O6 + 6O2"
व्याख्या :

Answer: A) 6CO2 + 6H2O -----> C6H12O6 + 6O2 Explanation: Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.   Photosynthesis can be represented using a chemical equation.   The overall balanced equation is                 6CO2 +  6H2O   →Sunlight    C6H12O6   +   6O2Source of Carbon & Oxygen  + Source of Electrons & Hydrogen + Energy that drives Photosynthesis             ----> Sugar + Gas produced by splitting water.   Where  CO2 = carbon dioxide  H2O = waterC6H12O6 = glucose  O2 = oxygen.

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