IIT JEE Practice Question and Answer
8Q: What has four wheels and flies? 2223 05b5cc63de4d2b4197774bae8
5b5cc63de4d2b4197774bae8- Show AnswerHide Answer
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Answer :
Explanation :
Garbage truck. It’s true, a garbage truck has 4 wheels and lots of flies because flies like garbage. Here flies means insects like houseflies, mosquitoes, ... It doesn't mean that it flies in the air.
Q: If x = √8 - √7, y = √6 - √5 and z = √10 - 3, which of the following is true ? 2223 05b5cc6dbe4d2b4197774e955
5b5cc6dbe4d2b4197774e955- 1x > y < zfalse
- 2x < y < zfalse
- 3x > y > zfalse
- 4z < x < ytrue
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Answer : 4. "z < x < y"
Explanation :
Answer: D) z < x < y Explanation: x = √8 - √7 = 1/(√8 + √7) and y = √6 - √5 = 1/(√6 + √5) and z = √10 - 3 = 1/(√10 + 3) As (√8 + √7) > (√6 + √5), (√8 - √7) < (√6 - √5) As (√10 + 3) > (√8 + √7) > (√6 + √5) z < x < y.
Q: Under which conditions are gases most soluble in water? 2222 05b5cc619e4d2b4197774b6fb
5b5cc619e4d2b4197774b6fb- 1low pressure and low temperaturefalse
- 2low pressure and high temperaturefalse
- 3high pressure and low temperaturetrue
- 4high pressure and high temperaturefalse
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Answer : 3. "high pressure and low temperature"
Explanation :
Answer: C) high pressure and low temperature Explanation: Henry's Law tells that the solubility of a gas is directly proportional to the partial pressure of the gas above the solvent. Hence under high pressure, more gas is dissolved. Also that Henry's Law involves a constant which is temperature-dependent. Under high temperatures, less gas is dissolved whereas under low temperatures, more gas is dissolved. For Example :: You can think of a can of soda. The contents are under pressure and if you shake the can before opening, the soda fizzes out all over as you open it. So the higher the pressure, the more gas or more CO2 can be dissolved in the drink. Eliminate choices 1 and 2. Now focus on the temperature. Soda goes flat (loses carbonation or gas) as it warms up. Soda is usually served cold because more of the carbonation or CO2 stays in the drink when the soda is cold. Hence, in high pressure and low temperature conditions gases are most soluble in water.
Q: Arun is a cashew merchant in Telangana. He has cashews in sealed wooden boxes of 10kg each. The price of the cashew increases by Rs.20 per kg for every year, but at the same time, 10% of the cashews are eaten by rodents every year. If the price of a 1 kg of fresh cashew is Rs.120, what is the change in his profits if he sells a sealed box after one year of storage, rather than selling it fresh ? (In Rs.) 2221 05b5cc728e4d2b4197774f719
5b5cc728e4d2b4197774f719- 1Rs. 60true
- 2Rs. 54false
- 3Rs. 80false
- 4Rs. 75false
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Answer : 1. "Rs. 60"
Explanation :
Answer: A) Rs. 60 Explanation: Price of 1kg fresh cashew = Rs.120Therefore, price of 10kg = Rs.120 x 10 = Rs.1200 10% of 10kg which eaten by rodents = 10 x 10/100 = 1kg. So, End of Year he had 10kg - 1kg = 9kg So, he sells that 9kg with Rs.20 per kg profit = 9 x 140 = 1260. He buy 10kg wooden box with cashew for Rs.1200 and sell that for Rs. 1260 So, profit = 1260 - 1200 = Rs.60 more money he get.
Q: Operating system functions may include 2221 05b5cc63de4d2b4197774bad4
5b5cc63de4d2b4197774bad4- 1multiprogrammingfalse
- 2input/output controlfalse
- 3virtual storagefalse
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation: An operating system has three main functions: (1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers, (2) establish a user interface, and (3) execute and provide services for applications software.
Q: A man walks 6 km at a speed of 112kmph, runs 8 km at a speed of 2 kmph and goes by bus another 32 km. Speed of the bus is 8 kmph. Find the average speed of the man in kmph. 2218 05b5cc764e4d2b4197774fd8a
5b5cc764e4d2b4197774fd8a- 14314false
- 24213true
- 32413false
- 43414false
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Answer : 2. "4213"
Explanation :
Answer: B) Option B Explanation: Man walked 6 km at 1.5 kmph, again he walked 8 km at speed of 2 kmph and 40 km at a speed of 8kmphtime taken indivisually: => 6/1.5 = 4 m=> 8/2 = 4 m=> 40/8 = 5 m Average speed of man= total distance/ total time=> 54/13 = 4213 kmph
Q: Where should a boat compass be mounted? 2218 05b5cc694e4d2b4197774c493
5b5cc694e4d2b4197774c493- 1near magnetfalse
- 2near ironfalse
- 3away from electrical wiringtrue
- 4All the abovefalse
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Answer : 3. "away from electrical wiring"
Explanation :
Answer: C) away from electrical wiring Explanation: A compass, which is used to assist in navigation, is an instrument that shows magnetic north. You must apply a correction to determine the direction of true north. The ability to steer a boat by a compass is useful if land is out of sight, visibility is reduced, or the boat operator is disoriented. Mount a boat compass away from iron, magnets, and electrical wiring and equipment.
Q: Fill in the blank with a suitable word from the given words. All the efforts of the batsmen went _____ vain as the bowlers failed to perform well. 2218 05b5cc71be4d2b4197774f4f9
5b5cc71be4d2b4197774f4f9- 1forfalse
- 2offfalse
- 3intrue
- 4outfalse
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Answer : 3. "in"
Explanation :
Answer: C) in Explanation:

