IIT JEE Practice Question and Answer
8Q: Who of the following appointed as head of Punjab National Bank ? 1313 05b5cc6e1e4d2b4197774ec06
5b5cc6e1e4d2b4197774ec06- 1Dinabandu Mohapatrafalse
- 2Usha Ananthasubramanianfalse
- 3R A Narayanfalse
- 4Sunil Mehtatrue
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Answer : 4. "Sunil Mehta"
Explanation :
Answer: D) Sunil Mehta Explanation: Dinabandu Mohapatra for - Bank of India Usha Ananthasubramanian for - Allahabad Bank R A Sankara Narayan for - Vijaya Bank
Q: Simplify the following equation [K-L2-K+L2]4K = a/b 1310 05b5cc6d6e4d2b4197774e674
5b5cc6d6e4d2b4197774e674- 1K = b /afalse
- 2bL = -atrue
- 3KL = 1false
- 4aK = -bfalse
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Answer : 2. "bL = -a"
Explanation :
Answer: B) bL = -a Explanation: [(K-L)2-K+L2]4K = abK2+L2-2KL-K2+L2+2KL4K= ab => - 4KL/4K = a/b => L = - a/b => bL = -a
Q: If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to _____ ? 1310 05b5cc6d9e4d2b4197774e853
5b5cc6d9e4d2b4197774e853- 1300 mtrue
- 230 mfalse
- 33 mfalse
- 40.3 mfalse
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Answer : 1. "300 m"
Explanation :
Answer: A) 300 m Explanation: h = = 3 × 108/106 = 300 m
Q: Which of the following is a property of sodium hydroxide? 1310 05b5cc697e4d2b4197774c5f5
5b5cc697e4d2b4197774c5f5- 1It is insoluble in ether and other Non-polar solventstrue
- 2It is slowly soluble in waterfalse
- 3It has an odor of rotten egg smellfalse
- 4All the abovefalse
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Answer : 1. "It is insoluble in ether and other Non-polar solvents"
Explanation :
Answer: A) It is insoluble in ether and other Non-polar solvents Explanation: Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+ and hydroxide anions OH−. Properties: 1. It is highly soluble in water, and readily absorbs moisture and carbon dioxide from the air. 2. NaOH is insoluble in ether and other non-polar solvents. 3. It is an odorless compound. Uses: Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner.
Q: "World Fisheries Day" is observed on _____ ? 1310 05b5cc6c3e4d2b4197774dc72
5b5cc6c3e4d2b4197774dc72- 121st Novtrue
- 211th Decfalse
- 310th Octfalse
- 429th Sepfalse
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Answer : 1. "21st Nov"
Explanation :
Answer: A) 21st Nov Explanation:
Q: What is the four-digit number in which the first digit is 1/3 of the second,the third is the sum of the first and second, and the last is three times the second ? 1309 05b5cc71be4d2b4197774f558
5b5cc71be4d2b4197774f558- Show AnswerHide Answer
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Answer :
Explanation :
It is given that the first digit is 1/3 of the second. There are 3 such possibilities 1)1 and 32)2 and 63)3 and 9 Now, the third digit is the sum of the first and second digits.1)1 + 3 = 4 2)2 + 6 = 83)3 + 9 = 12It is clear that option 3 is not possible. So we are left with only two options. Also, the last digit is three times the second, which rules out the second option. Hence, the answer is 1349.
Q: If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x+y is equal to ? 1309 05b5cc761e4d2b4197774fd62
5b5cc761e4d2b4197774fd62- 15false
- 24false
- 33false
- 42true
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Answer : 4. "2"
Explanation :
Answer: D) 2 Explanation: Since 653xy is divisible by 5 as well as 2, so y = 0.Now, 653x0 must be divisible by 8.So, 3x0 must be divisible by 8. This happens when x = 2x + y = (2 + 0) = 2.
Q: _______ creates history, becoming leading run-getter in Women’s ODIs ? 1308 05b5cc6d1e4d2b4197774e3c5
5b5cc6d1e4d2b4197774e3c5- 1M.M. Lanningfalse
- 2S.R. Taylorfalse
- 3Mithali Rajtrue
- 4Charlotte Edwardsfalse
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Answer : 3. "Mithali Raj"
Explanation :
Answer: C) Mithali Raj Explanation: 1. Mithali Raj has been India’s premier player ever since she made her debut in 1999. 2. In the crucial game against Australia, Mithali became the woman cricketer who has scored most runs in ODIs. Mithali Raj became the first women’s player to reach 6000 ODI runs. England’s Charlotte Edwards was the previous leading run-getter in ODIs with 5992 runs. 3. She has 48 not-outs to her name, which is the most in women’s cricket.