IIT JEE Practice Question and Answer
8Q: Which is faster Light or Sound? 1573 15b5cc6b3e4d2b4197774d463
5b5cc6b3e4d2b4197774d463- 1Lighttrue
- 2Soundfalse
- 3Both are samefalse
- 4Can't be determinedfalse
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Answer : 1. "Light"
Explanation :
Answer: A) Light Explanation: Light travels Faster than Sound. Light : 1. Light doesn't require a medium to travel. 2. It travels in the vaccum with the speed of 1,86,000 miles per second. Sound: 1. Sound rquire a medium. 2. It travels in the Air with the speed of 340 meters per second. 3. It travels Faster in Water than in Air. 4. It travels Faster in Steel than in Water.
Q: Who Built The Suez Canal? 1572 05b5cc6b3e4d2b4197774d3dd
5b5cc6b3e4d2b4197774d3dd- 1Theodore Rooseveltfalse
- 2Ferdinand de Lessepstrue
- 3Robert Millsfalse
- 4James Hobanfalse
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Answer : 2. "Ferdinand de Lesseps"
Explanation :
Answer: B) Ferdinand de Lesseps Explanation: The Suez Canal in Egypt, is a 101 mile long canal that connects the Mediterranean Sea with the Gulf of Suez, a northern branch of the Red Sea. It was built in 1869 by Ferdinand de Lesseps.
Q: K men agree to donate a gift of Rs. L to trust. If three men drop out how much more will each have to contribute towards the purchase of the gift ? 1571 05b5cc74fe4d2b4197774fb44
5b5cc74fe4d2b4197774fb44- 1L / (k-3)false
- 2k / (L-3)false
- 32K / 3L-Kfalse
- 43L / K(K-3)true
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Answer : 4. "3L / K(K-3)"
Explanation :
Answer: D) 3L / K(K-3) Explanation: Intial contribution = L/KAfter 3 men drop, then contribution =L/K-3The amount more to pay in contribution = LK-3 - LK = 3LK(K-3)
Q: Nucleotides are attached by bonds between the 1571 05b5cc658e4d2b4197774bda9
5b5cc658e4d2b4197774bda9- 1phosphates and sugarstrue
- 2nitrates and sugarsfalse
- 3nitrates and phosphatesfalse
- 4sugars and hydratesfalse
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Answer : 1. "phosphates and sugars"
Explanation :
Answer: A) phosphates and sugars Explanation: In DNA, adjacent nucleotides are linked by a phosphodiester bond: a covalent bond is formed between the 5' phosphate group of one nucleotide and the 3'-OH group of another. Hence, in this manner, each strand of DNA has a "backbone" of phosphate-sugar-phosphate-sugar-phosphate.
Q: If the price of a commodity is decreased by 20% and its consumption is increased by 10%, what will be the increase or decrease in the expenditure on the commodity? 1570 05b5cc6a2e4d2b4197774cb70
5b5cc6a2e4d2b4197774cb70- 1increase 12%false
- 2decrease 12%true
- 3increase 16%false
- 4decrease 16%false
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Answer : 2. "decrease 12%"
Explanation :
Answer: B) decrease 12% Explanation: Given the price of a commodity is decreased by p = 20% And its consumption is increased by q = 10% Now, required increase or decrease in the expenditure on the commodity can be p + q + pq/100 = -20 + 10 - 200/100 = -10 - 2 = -12%. Hence, decrease in the expenditure = 12%
Q: Hemavathi gets 3 marks for each right sum and loses 2 marks for each wrong sum. He attempts 35 sums and obtains 60 marks. The number of sums attempted correctly is ? 1570 05b5cc73de4d2b4197774f90c
5b5cc73de4d2b4197774f90c- 123false
- 224false
- 325false
- 426true
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Answer : 4. "26"
Explanation :
Answer: D) 26 Explanation: Let, Hema attempted 'k' sum correctly, then k x 3 -2 x(35-k) = 605k = 130k = 26 so 26 correct sums.
Q: What are the followers of buddhism called? 1570 05b5cc675e4d2b4197774c148
5b5cc675e4d2b4197774c148- 1Buddhiststrue
- 2Parsisfalse
- 3Noble Truthsfalse
- 4Bhikkhusfalse
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Answer : 1. "Buddhists"
Explanation :
Answer: A) Buddhists Explanation: Buddhism is the world's fourth-largest religion, with over 520 million followers or over 7% of the global population. People who practice Buddhism are called Buddhists. Buddhists seek to reach a state of nirvana, following the path of the Buddha, Siddhartha Gautama, who went on a quest for Enlightenment around the sixth century BC. There is no belief in a personal god.
Q: 112 × 54 = 1570 05b5cc6b9e4d2b4197774d752
5b5cc6b9e4d2b4197774d752- 168947false
- 269874false
- 370000true
- 476000false
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Answer : 3. "70000"
Explanation :
Answer: C) 70000 Explanation: 112 × 54112 × 1024= 112 × 1000024= 1120000/16 = 70,000.

