IIT JEE Practice Question and Answer
8Q: Compressions and Rarefactions are characteristic of 1782 05b5cc6a9e4d2b4197774ceea
5b5cc6a9e4d2b4197774ceea- 1Longitudinal wavestrue
- 2Transverse wavesfalse
- 3Both A & Bfalse
- 4Neither of A & Bfalse
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Answer : 1. "Longitudinal waves"
Explanation :
Answer: A) Longitudinal waves Explanation: Compressions and Rarefactions are characteristic of Longitudinal waves. The direction of vibration of the particles is in the same plane as in which the wave is propagating. The particles vibrate back and forth, about their mean positions.
Q: A man covers half of his journey by train at 60 km/hr, half of the remaining by bus at 30 km/hr and the rest by cycle at 10 km/hr. Find his average speed during the entire journey? 1782 05b5cc6ade4d2b4197774d12f
5b5cc6ade4d2b4197774d12f- 132 kmphfalse
- 220 kmphfalse
- 318 kmphfalse
- 424 kmphtrue
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Answer : 4. "24 kmph"
Explanation :
Answer: D) 24 kmph Explanation: Let the total distance of the journey of a man = d kms Now, the average speed of the entire journey = dd120 + d120 + d40 = 24 kmph.
Q: _ po _ mp _ n _ _ onmpo_. 1782 05b5cc6d6e4d2b4197774e67e
5b5cc6d6e4d2b4197774e67e- 1opmpnmfalse
- 2mponpofalse
- 3mnompntrue
- 4mnopnmfalse
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Answer : 3. "mnompn"
Explanation :
Answer: C) mnompn Explanation: The pattern 'mpon' is repeated.
Q: The price of pulses has increased by 25%. The percentage of reduction that a family should effect in the use of pulses so as not to increase the expenditure on this account is ? 1782 05b5cc75ce4d2b4197774fc3e
5b5cc75ce4d2b4197774fc3e- 116%false
- 220%true
- 384%false
- 472%false
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Answer : 2. "20%"
Explanation :
Answer: B) 20% Explanation: Reduction in consumption= P100+P X 100%= 25100+25 X 100%= 20%
Q: MONEX is associated with 1782 05b5cc651e4d2b4197774bd00
5b5cc651e4d2b4197774bd00- 1Monetary experimentfalse
- 2Lunar experimentfalse
- 3Montreal experimentfalse
- 4Monsoon experimenttrue
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Answer : 4. "Monsoon experiment"
Explanation :
Answer: D) Monsoon experiment Explanation: Monsoon experiment is abbreviated as MONEX. The Monsoon Experiment is the core of the GARP Monsoon Subprogramme, which is a major international effort to achieve a better understanding of the Planetary monsoon circulation, the major seasonal perturbation of the general circulation of the atmosphere and the influence of the annual cycle of precipitation associated with the monsoon on the agriculture of the many populous nations of the region. Hence, MONEX is associated with The Monsoon Experiment.
Q: With an average speed of 40 km/hr, a train reaches its destination in time. If it goes with an average speed of 35 km/hr, it is late by 15 minutes. Find the length of the total journey? 1781 05b5cc662e4d2b4197774be9c
5b5cc662e4d2b4197774be9c- 170 kmstrue
- 260 kmsfalse
- 345 kmsfalse
- 430 kmsfalse
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Answer : 1. "70 kms"
Explanation :
Answer: A) 70 kms Explanation: Let the time taken by train be 't' hrs. Then, 40t = 35t + 1560 40t = 35t + 35/4 t = 7/4 hrs Therefore, Required length of the total journey d = s x t = 40 x 7/4 = 70 kms.
Q: Which of the following Rivers has no Bridges built over it? 1781 05b5cc6bde4d2b4197774d906
5b5cc6bde4d2b4197774d906- 1Nilefalse
- 2Congo riverfalse
- 3Amazon rivertrue
- 4Yellow riverfalse
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Answer : 3. "Amazon river"
Explanation :
Answer: C) Amazon river Explanation: There are No bridges over The Amazon River. The Amazon River, in South America, is the largest river by discharge volume of water in the world and the second longest in length after The Nile in Egypt.
Q: What is the name of the World's smallest republic which has an area of 21 sq.km.? 1781 05b5cc6a8e4d2b4197774ceb1
5b5cc6a8e4d2b4197774ceb1- 1Palermofalse
- 2Naurutrue
- 3Vatican Cityfalse
- 4Namurfalse
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Answer : 2. "Nauru"
Explanation :
Answer: B) Nauru Explanation: