IIT JEE Practice Question and Answer
8Q: A man reaches his office 20 min late, if he walks from his home at 3 km per hour and reaches 30 min early if he walks 4 km per hour. How far is his office from his house ? 5808 05b5cc74ae4d2b4197774fa68
5b5cc74ae4d2b4197774fa68- 120 kmfalse
- 216 kmfalse
- 314 kmfalse
- 410 kmtrue
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Answer : 4. "10 km"
Explanation :
Answer: D) 10 km Explanation: Let distance = x km.Time taken at 3 kmph : dist/speed = x/3 = 20 min late.time taken at 4 kmph : x/4 = 30 min earlierdifference between time taken : 30-(-20) = 50 mins = 50/60 hours.x/3- x/4 = 50/60x/12 = 5/6x = 10 km.
Q: Second Ozone Hole was detected over 5807 05b5cc697e4d2b4197774c5aa
5b5cc697e4d2b4197774c5aa- 1Tibettrue
- 2Swedenfalse
- 3Northern hemisoherefalse
- 4Antarcticafalse
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Answer : 1. "Tibet"
Explanation :
Answer: A) Tibet Explanation: Second ozone hole was detected over Tibet in the year 2006. Ozone is a form of oxygen, acts as a high-altitude atmospheric screen against cancer-causing ultraviolet light. The main source of these halogens in the stratosphere is photodissociation of man made halocarbon refrigerants, solvents, propellants and CFC's.
Q: egg: fish : : ________ : plant 5799 05b5cc6d9e4d2b4197774e848
5b5cc6d9e4d2b4197774e848- 1seedtrue
- 2stemfalse
- 3rootfalse
- 4leaffalse
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Answer : 1. "seed"
Explanation :
Answer: A) seed Explanation: Fish is from eggs whereas plant is from seeds.
Q: कौन सा मदरबोर्ड फॉर्म फैक्टर एक 20 पिन कनेक्टर का उपयोग करता है? 5775 15b5cc6abe4d2b4197774cfd1
5b5cc6abe4d2b4197774cfd1- 1Baby ATfalse
- 2ATfalse
- 3ATXtrue
- 4उपरोक्त सभीfalse
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Answer : 3. "ATX"
Explanation :
Answer: C) ATX व्याख्या: ATX (एडवांस्ड टेक्नोलॉजी एक्सटेंडेड) एक मदरबोर्ड फॉर्म फैक्टर है जो एक 20 पिन कनेक्टर का उपयोग करता है। एटीएक्स को इंटेल द्वारा 1995 में एटी फॉर्म फैक्टर जैसे पिछले वास्तविक मानकों में सुधार करने के लिए विकसित किया गया था। यह कई वर्षों में डेस्कटॉप कंप्यूटर एनक्लोजर, मदरबोर्ड और बिजली आपूर्ति डिजाइन में पहला बड़ा बदलाव था, जिससे भागों के मानकीकरण और विनिमेयता में सुधार हुआ।
Q: The market price of an article was 40% more than its cost price. Rana was going to sell it at market price to a customer, but he showed Rana some defects in the article, due to which Rana gave him a discount of 28.57%. Next day he came again and showed Rana some more defects, hence he gave him another discount that was equal to 12.5% of the cost price. What was the approximate profit/loss to Rana ? 5770 05b5cc75ce4d2b4197774fc8e
5b5cc75ce4d2b4197774fc8e- 1Loss of 12.5%true
- 2Profit of 12.5%false
- 3Loss of 24.5%false
- 4Profit of 22.5%false
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Answer : 1. "Loss of 12.5%"
Explanation :
Answer: A) Loss of 12.5% Explanation: Let the cost price be Rs. 100Then, market price is Rs. 140Now, the first discount is of 28.57% Rs.140 =~ Rs. 40Hence, its selling price = 140 - 40 = Rs. 100Now since Rana is selling at cost price, any further discount will be equal to loss percentage. The next dicount of 12.5% will be the loss percentage to Rana.
Q: A constitutional monarchy provides what power to a monarch? 5769 05b5cc67ee4d2b4197774c220
5b5cc67ee4d2b4197774c220- 1Absolute power over parliamentfalse
- 2Only power given in the constitutiontrue
- 3Power for kings, not queensfalse
- 4A divine right of kingsfalse
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Answer : 2. "Only power given in the constitution"
Explanation :
Answer: B) Only power given in the constitution Explanation: A constitutional monarchy is a form of monarchical government established under a constitutional system which acknowledges an elected or hereditary monarch as head of state. The monarchs in a constitutional monarchy had only the power that was allocated to them in the constitution of their land or republic.
Q: Select the odd term out of the following? 5738 15b5cc6bfe4d2b4197774da2e
5b5cc6bfe4d2b4197774da2e- 1Internettrue
- 2Macintosh OSXfalse
- 3Linux Mintfalse
- 4Windows 8.1false
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Answer : 1. "Internet"
Explanation :
Answer: A) Internet Explanation: Internet is not an operating system.
Q: SI unit of equivalent conductance 5717 05b5cc670e4d2b4197774bffd
5b5cc670e4d2b4197774bffd- 1ohm/cmfalse
- 2Siemens m2/equivalenttrue
- 3Siemens/equivalentfalse
- 4mho/cmfalse
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Answer : 2. "Siemens m2/equivalent"
Explanation :
Answer: B) Siemens m2/equivalent Explanation: Equivalent conductance is defined as the conductance of an electrolyte solution containing one gram equivalent of the electrolyte. It is equal to the product of specific conductance (k) of the solution and the volume (V) of the solution that contains one gram equivalent of the electrolyte. λ = k x V Unit of spceific conductance k is Siemens / m. Volume of the solution V is m3 Now, required equivalent conductance unit is Siemens.m2/equivalent .