IIT JEE Practice Question and Answer
8Q: Mahesh bought 100 kg of rice for Rs. 1040 and sold it at a loss of as much money as he received for 30 kg rice. At what price did he sell the rice? 1439 05b5cc6b3e4d2b4197774d3e3
5b5cc6b3e4d2b4197774d3e3- 1Rs. 7.46/kgfalse
- 2Rs. 8/kgtrue
- 3Rs. 8.74/kgfalse
- 4Rs. 8.56/kgfalse
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Answer : 2. "Rs. 8/kg"
Explanation :
Answer: B) Rs. 8/kg Explanation: Let the selling price of the rice = Rs.P/kg Now, according to the question, 1040 - 100p = 30p => p = 8/kg Hence, the selling price of the rice = Rs. 8/kg
Q: Currency exchange rates are based on 1439 05b5cc62ce4d2b4197774b8f7
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Answer :
Explanation :
The amount of money you’ll get for a given amount of your country’s currency is based on internationally determined exchange rates. Exchange rates can be either fixed or floating. Fixed exchange rates use a standard, such as gold or another precious metal, and each unit of currency corresponds to a fixed quantity of that standard that should (theoretically) exist.
Q: Which is faster Light or Sound? 1438 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 has launched a survey on the NaMo App, asking people to rate the performance of the government at the Centre and MPs and MLAs in their constituencies recently? 1436 05b5cc669e4d2b4197774bf36
5b5cc669e4d2b4197774bf36- 1Home Minister Rajnath Singhfalse
- 2HRD Minister Prakash Javadekarfalse
- 3Finance Minister Piyush Goyalfalse
- 4Prime Minister Narendra Moditrue
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Answer : 4. "Prime Minister Narendra Modi"
Explanation :
Answer: D) Prime Minister Narendra Modi Explanation: Prime Minister Narendra Modi has launched a survey on the NaMo App, asking people to rate the performance of the government at the Centre and MPs and MLAs in their constituencies. He launched the initiative, to mark the completion of four years of the NDA government, which came to power at the Centre in 2014.
Q: Which country have declared 2020 'Unique Year for Space Sector' ? 1436 05b5cc6c0e4d2b4197774db23
5b5cc6c0e4d2b4197774db23- 1United Arab Emiratestrue
- 2Englandfalse
- 3USAfalse
- 4Indiafalse
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Answer : 1. "United Arab Emirates"
Explanation :
Answer: A) United Arab Emirates Explanation:
Q: Electrical Arcing occurs when 1436 05b5cc69be4d2b4197774c7d7
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Answer :
Explanation :
An electric arc is a visible plasma discharge between two electrodes that is caused by electrical current ionizing gasses in the air. Electric arcs occur in nature in the form of lightning.
Q: There are 11 True or False questions. How many ways can these be answered ? 1435 05b5cc6d0e4d2b4197774e385
5b5cc6d0e4d2b4197774e385- 111!/2false
- 21024false
- 311!false
- 42048true
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Answer : 4. "2048"
Explanation :
Answer: D) 2048 Explanation: Given 11 questions of type True or False Then, Each of these questions can be answered in 2 ways (True or false) Therefore, no. of ways of answering 11 questions = 211 = 2048 ways.
Q: Which solution has the highest pH? 1435 05b5cc6a2e4d2b4197774cb8a
5b5cc6a2e4d2b4197774cb8a- 150.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)true
- 250.0 mL 0.0500 M sodium hydroxide, NaOH (aq)false
- 350.0 mL 0.0500 M nitric acid, HNO3 (aq)false
- 450.0 mL 0.0500 M nitrous acid, HNO2 (aq)false
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Answer : 1. "50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)"
Explanation :
Answer: A) 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) Explanation: 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) has the highest pH value. Sodium hydroxide and Calcium hydroxide are strong bases so they completely ionize in solution. Because they ionize at the same rate, and Calcium hydroxide has the higher pH calculated, then Calcium hydroxide, in fact, has the highest pH. Nitric acid is a strong acid, so it completely ionizes in water. Whilst nitrous acid is a weak acid. Therefore, the nitric acid solution has the LOWEST ph.

