IIT JEE Practice Question and Answer
8Q: Which of these is a starting point for primary succession? 1425 05b5cc68ee4d2b4197774c412
5b5cc68ee4d2b4197774c412- 1a neglected yardfalse
- 2a surface exposed by a retreating glaciertrue
- 3an abandoned cityfalse
- 4abandoned farmlandfalse
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Answer : 2. "a surface exposed by a retreating glacier"
Explanation :
Answer: B) a surface exposed by a retreating glacier Explanation:
Q: What process never occurs in interphase? 1425 05b5cc62ae4d2b4197774b8c7
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Answer :
Explanation :
Absence of cell division is the process that never comes in interphase.
Q: Oxidation Number of 'S' in H2SO4? 1425 05b5cc6b3e4d2b4197774d491
5b5cc6b3e4d2b4197774d491- 1+6true
- 2+2false
- 3-6false
- 4-2false
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Answer : 1. "+6"
Explanation :
Answer: A) +6 Explanation: In H2SO4, Hydrogen has a charge of +2, with each hydrogen has +1. Oxygen has a charge of -8, with each oxugen has -2. Total charge = (2 - 8) = -6 Therefore, the Oxidation number of Sulphur S is '+6' because to make the compound stable.
Q: What is something you will never see again? 1425 05b5cc62ae4d2b4197774b8eb
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Answer :
Explanation :
Yesterday, is what we will never see again as the time we come across will never be back.
Q: Number Challenge Puzzle ? 1424 05b5cc6d3e4d2b4197774e4be
5b5cc6d3e4d2b4197774e4be- 11true
- 24false
- 35false
- 40false
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Answer : 1. "1"
Explanation :
Answer: A) 1 Explanation: In each row, Sum of 1st two digit number + last two digit number = Middle two digit number i.e., 1st row 15 + 40 = 55 2nd row 46 + 47 = 93 Similarly, 7x + 16 = 87 => x = 1.
Q: The Hydraulic Break works on the principle of _____ ? 1424 05b5cc6c2e4d2b4197774dc09
5b5cc6c2e4d2b4197774dc09- 1Pascal's Lawtrue
- 2Boyle's lawfalse
- 3Coulomb's lawfalse
- 4Bernouli's lawfalse
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Answer : 1. "Pascal's Law"
Explanation :
Answer: A) Pascal's Law Explanation:
Q: Simplify the following equation [K-L2-K+L2]4K = a/b 1422 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: Commissioned - Antonym 1422 05b5cc658e4d2b4197774bdb8
5b5cc658e4d2b4197774bdb8- 1Instructfalse
- 2Empowerfalse
- 3Nominatefalse
- 4Dismisstrue
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Answer : 4. "Dismiss"
Explanation :
Answer: D) Dismiss Explanation: Commissioned means Authority granted for a particular action or function. Here, in the given options Dismiss is the only word which is opposite in meaning to commissioned. Hence, Antonym of Commissioned is Dismiss.