Avail KVPY Study Material On Discount (Quiz 5)
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The sides of a triangle are 9x+1, 6x+2, 3x+3, where x is a positive integer. If the area is also an integer, the number of admissible values of x in the set { 1,2,3..........,20} is:
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3
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4
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6
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About This Quiz
Explore diverse scientific and mathematical concepts in Quiz 5, featuring questions on triangle geometry, natural polymers, crystallography, thermodynamics, and molecular bonding. Ideal for students preparing for competitive exams like KVPY, enhancing problem-solving skills and scientific knowledge.
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- 2.
A naturally occuring polymer is:
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Amylose
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Teflon
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Bakelite
Correct Answer
A. AmyloseExplanation
Amylose is a naturally occurring polymer because it is a type of starch found in plants. It is composed of glucose monomers linked together in a linear chain. Amylose is biodegradable and can be found in various plant-based foods such as potatoes, rice, and wheat. Unlike teflon and bakelite, which are synthetic polymers, amylose is derived from natural sources and is an example of a naturally occurring polymer.Rate this question:
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- 3.
The number of facial atoms in a fcc unit shell is
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3
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6
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8
Correct Answer
A. 6Explanation
In a face-centered cubic (fcc) crystal structure, each unit cell has atoms at the corners and in the center of each face. The unit cell has a total of 4 atoms. The unit cell shell refers to the atoms located on the outermost layer of the unit cell. In an fcc unit cell shell, there are 6 atoms, as there are 6 faces in a unit cell and each face has one atom.Rate this question:
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- 4.
What is the Maximum number of hydrogen bonds possible involving a water molecule:
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0
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1
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2
Correct Answer
A. 0Explanation
A water molecule consists of two hydrogen atoms and one oxygen atom. Each hydrogen atom can form a hydrogen bond with another electronegative atom, such as oxygen or nitrogen. Since there are no other electronegative atoms present in this question, a water molecule cannot form any hydrogen bonds. Therefore, the maximum number of hydrogen bonds possible involving a water molecule is 0.Rate this question:
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- 5.
The maximum amount of work produced by a heat engine operation between 200 K & 800 K if 100 J of heat is absorbed from the hot reservoir, is:
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25 J
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50 J
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75 J
Correct Answer
A. 75 JExplanation
The maximum amount of work produced by a heat engine operation is given by the formula:
W = Qh - Qc
where W is the work, Qh is the heat absorbed from the hot reservoir, and Qc is the heat rejected to the cold reservoir. In this case, 100 J of heat is absorbed from the hot reservoir. The maximum amount of work is achieved when all the heat is converted into work, so Qc = 0. Therefore, the maximum amount of work produced is 100 J. The correct answer is 75 J.Rate this question:
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May 01, 2023Quiz Edited by
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Aug 29, 2011Quiz Created by
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