IIT JEE Practice Question and Answer

Q: Navaneet has thrice the money Poonam has and Poonam has 25% more money than Hebah. If the average money of the three is Rs. 350, What is the amount that Navaneet has ? 1534 0

  • 1
    Rs. 175
    Correct
    Wrong
  • 2
    Rs. 220.75
    Correct
    Wrong
  • 3
    Rs. 218.55
    Correct
    Wrong
  • 4
    Rs. 656.25
    Correct
    Wrong
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Answer : 4. "Rs. 656.25"
Explanation :

Answer: D) Rs. 656.25 Explanation: Assume Hebah has Rs. M Since 25% more money at Poonam => Money at Poonam = M + (25% of M) => Money at Poonam = M + 0.25M = Rs. 1.25M Money with Navaneet is thrice the money with Poonam, => Money at Navaneet = 3(1.25M) = Rs. 3.75M Now, sum of all Money = (M + 1.25M + 3.75M) = Rs. 6M But given the average of the money is Rs. 350 => 6M/3 = 350 => 2M = 350 => M = 350/2 = Rs. 175 => Amount of money Navaneet has = Rs. 3.75M = 3.75 x 175 = Rs. 656.25.

Q: Which solution has the highest pH? 1534 0

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    50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)
    Correct
    Wrong
  • 2
    50.0 mL 0.0500 M sodium hydroxide, NaOH (aq)
    Correct
    Wrong
  • 3
    50.0 mL 0.0500 M nitric acid, HNO3 (aq)
    Correct
    Wrong
  • 4
    50.0 mL 0.0500 M nitrous acid, HNO2 (aq)
    Correct
    Wrong
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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.

Q: A man pays Rs. 6.40 per litre of milk. He adds water and sells the mixture at Rs. 8 per litre, thereby making 37.5% profit. The proportion of water to milk received by the customers is 1534 0

  • 1
    1 : 10
    Correct
    Wrong
  • 2
    10 : 1
    Correct
    Wrong
  • 3
    9 : 11
    Correct
    Wrong
  • 4
    11 : 9
    Correct
    Wrong
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Answer : 1. "1 : 10"
Explanation :

Answer: A) 1 : 10 Explanation: Customer ratio of Milk and Water is given by Milk          ::        Water   6.4                         0          81 + 38 =6411  6411                      6410 - 6411  => Milk : Water = 110 : 11 = 10 : 1   Therefore, the proportionate of Water to Milk for Customer is 1 : 10

Q: The Global Entrepreneurship Summit (GES) 2017 was in ______? 1534 0

  • 1
    Spain
    Correct
    Wrong
  • 2
    Hyderabad
    Correct
    Wrong
  • 3
    Newyork
    Correct
    Wrong
  • 4
    Beijing
    Correct
    Wrong
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Answer : 2. "Hyderabad"
Explanation :

Answer: B) Hyderabad Explanation: The United States of America and the Republic of India are proud to announce the 8th annual Global Entrepreneurship Summit (GES) in Hyderabad, India on 28-30 November, 2017. This year's Summit will highlight the theme Women First, Prosperity for All, and will focus on supporting women entrepreneurs and fostering economic growth globally. Advisor to the President Ivanka Trump will headline the United States delegation to the Summit.   GES is the preeminent annual entrepreneurship gathering that convenes emerging entrepreneurs, investors and supporters from around the world. GES 2017 will create an environment that empowers innovators, particularly women, to take their ideas to the next level. Through two and a half days of networking, mentoring, and workshops, GES empowers entrepreneurs to pitch their ideas, build partnerships, secure funding, innovate, and find their target customers --- creating new goods and services that will transform societies.

Q: Which of the following things was illegalised by India Act 5th of 1843 ? 1533 0

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    Sati Pratha
    Correct
    Wrong
  • 2
    Slavery
    Correct
    Wrong
  • 3
    Polygamy
    Correct
    Wrong
  • 4
    Child marriage
    Correct
    Wrong
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Answer : 2. "Slavery"
Explanation :

Answer: B) Slavery Explanation: The Indian Slavery Act, also called as Act 5th of 1843, was an act passed in British India under East India Company rule, which outlawed many economic transactions associated with slavery.

Q: Which dinosaur is sometimes referred to as the thunder lizard? 1532 0

  • 1
    Diplodocus
    Correct
    Wrong
  • 2
    Brontosaurus
    Correct
    Wrong
  • 3
    Arm reptile
    Correct
    Wrong
  • 4
    Cunningham
    Correct
    Wrong
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Answer : 2. "Brontosaurus"
Explanation :

Answer: B) Brontosaurus Explanation: Although well known as one of the most iconic dinosaurs, Brontosaurus (the 'thunder lizard') has long been considered misclassified. Since 1903, the scientific community has believed that the genus Brontosaurus was in fact the Apatosaurus.

Q: The average salinity of seawater is 1532 0

  • 1
    35%
    Correct
    Wrong
  • 2
    3.5%
    Correct
    Wrong
  • 3
    3%
    Correct
    Wrong
  • 4
    2.5%
    Correct
    Wrong
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Answer : 2. "3.5%"
Explanation :

Answer: B) 3.5% Explanation: Seawater or salt water is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5% or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts dissolved in it.   Hence, The average salinity of seawater is 3.5%.

Q: Which is faster Light or Sound? 1532 1

  • 1
    Light
    Correct
    Wrong
  • 2
    Sound
    Correct
    Wrong
  • 3
    Both are same
    Correct
    Wrong
  • 4
    Can't be determined
    Correct
    Wrong
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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.

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