IIT JEE Practice Question and Answer
8Q: The more you take away the larger it becomes. What is that? 1421 05b5cc63de4d2b4197774baff
5b5cc63de4d2b4197774baff- Show AnswerHide Answer
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Answer :
Explanation :
A Hole. When you are digging a hole the more you take out the soil, the igger the hole becomes.
Q: Ozone hole refers to 1421 05b5cc6bbe4d2b4197774d82a
5b5cc6bbe4d2b4197774d82a- 1Decrease in the thickness of ozone layer in Stratospheretrue
- 2Increase in thickness of ozone layerfalse
- 3Decrease in the ozone layer in Tropospherefalse
- 4Hole in the ozone layerfalse
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Answer : 1. "Decrease in the thickness of ozone layer in Stratosphere"
Explanation :
Answer: A) Decrease in the thickness of ozone layer in Stratosphere Explanation:
Q: Plants that make their own food are called 1421 05b5cc62fe4d2b4197774b995
5b5cc62fe4d2b4197774b995- 1Autotrophstrue
- 2Hydrophyllsfalse
- 3Decomposersfalse
- 4Heterotrophsfalse
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Answer : 1. "Autotrophs"
Explanation :
Answer: A) Autotrophs Explanation: Plants make their own food through the process of photosynthesis. Plants are self-sufficient. Green plants have the ability to prepare their own food and this is the reason why they are called autotrophs. They make their own food through the process of photosynthesis using light energy to make sugars from carbon dioxide (C02) and water (H20). The chlorophyll which is present in the leaves is the main reason for the production of food in the plants and it is the reason for the greenery of the leaves too.
Q: Area of a square and a rectangle are equal. If side of the square is 40 cm and length of the rectangle is 64 cm, what is the perimeter of the rectangle ? 1420 05b5cc6c2e4d2b4197774dbe1
5b5cc6c2e4d2b4197774dbe1- 1187 cmfalse
- 2178 cmtrue
- 3149 cmfalse
- 4194 cmfalse
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Answer : 2. "178 cm"
Explanation :
Answer: B) 178 cm Explanation: Area of square = 40 x 40 = 1600 sq.cm Given that the areas of Square and Rectangle are equal => Area of rectangle = 1600 Sq.cm We know that, Area of rectangle = L x B Given L = 64 cm Breadth of rectangle = 1600/64 = 25 cm Perimeter of the rectangle = 2(L + B) = 2(64+25) = 178 cm.
Q: Which is an example of Phototropism? 1418 05b5cc6abe4d2b4197774cfd6
5b5cc6abe4d2b4197774cfd6- 1roots of a plant following waterfalse
- 2plant bending toward the lighttrue
- 3roots growing into the soilfalse
- 4a venus flytrap capturing a flyfalse
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Answer : 2. "plant bending toward the light"
Explanation :
Answer: B) plant bending toward the light Explanation: Phototropism is the ability of a photosynthesizing organism, to grow directionally in response to a light source. It is very common in plants, but can also occur in other organisms such as fungi. Example :: Sunflower
Q: Solve the Number Puzzle ? 1416 05b5cc6c9e4d2b4197774dfb6
5b5cc6c9e4d2b4197774dfb6- 120false
- 224false
- 326true
- 430false
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Answer : 3. "26"
Explanation :
Answer: C) 26 Explanation: Here the puzzle follows the logic that Right side number = sum of the number on the left side and the previous number on the left side => 6 = 4+2 => 10 = 6+4 => ? = 16+10 = 26.
Q: Visible light has a higher frequency than 1416 05b5cc63de4d2b4197774bacf
5b5cc63de4d2b4197774bacf- 1Radio wavestrue
- 2X raysfalse
- 3Ultra violetfalse
- 4All the abovefalse
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Answer : 1. "Radio waves"
Explanation :
Answer: A) Radio waves Explanation: Radio waves have much longer wavelengths and lower frequencies than do visible light waves. In contrast, X-rays have much shorter wavelengths and higher frequencies. Ultraviolet Light (UV). part of the electromagnetic spectrum that consists of waves with frequencies higher than those of visible light and lower than those of x-rays.
Q: A container contains 120 lit of Diesel. From this container, 12 lit of Diesel was taken out and replaced by kerosene. This process was further repeated for two times. How much diesel is now there in the container ? 1416 05b5cc6c3e4d2b4197774dc86
5b5cc6c3e4d2b4197774dc86- 188.01 litfalse
- 287.48 littrue
- 387.51 litfalse
- 487.62 litfalse
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Answer : 2. "87.48 lit"
Explanation :
Answer: B) 87.48 lit Explanation: For these type of problems, Quantity of Diesel remained = q1-pqn Here p = 12 , q = 120 => 1201-121203 = 120 x 0.9 x 0.9 x 0.9 = 87.48 lit.

