Chemistry is the study of the substances that make up matter. It looks at their properties, how they react with each other, and how these reactions can create new substances.
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Question 201: Which of the following alloys contain iron?
Options:
A) Duralumin and steel
B) Brass and bronze
C) Steel and permalloy
D) Soft solder and duralumin
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The correct answer is C .
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Question 202: Which quantum number divides shells into orbitals?
Options:
A) principal
B) Arzimuthal
C) Magnetic
D) Spin
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The correct answer is B .
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Question 203:
Which halogen is a gas at room temperature and is pale yellow in color?
Options:
A) Chlorine (Cl)
B) Fluorine (F)
C) Iodine (I)
D) Bromine (Br)
Show Answer
The correct answer is B .
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Question 204: Which of the following properties is NOT peculiar to matter?
Options:
A) kinetic energy of particles increase from solid to gas
B) Random motion of particles increases from liquid to gas
C) Orderliness of particles increases from gas to liquid
D) Random motion of particles increases from gas to solid
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The correct answer is D .
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Question 205: Which of the following is NOT a true statement of the kinetic Theory of Gases?
Options:
A) The molecules move at random
B) The size of molecules is negligble as compared with the volume of gas
C) The molecular collisions are perfectly elastic
D) Every molecule has the same kinetic energy at a particular temperature
E) The average kinetic energy is proportional to the absolute temperature of the gas
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The correct answer is D .
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Question 206: Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal?
Options:
A) X
B) W
C) Z
D) Y
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The correct answer is C .
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Question 207: Cotton is almost pure?
Options:
A) starch
B) protein
C) animal fibre
D) celluose
E) mineral fibre
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The correct answer is D .
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Question 208: Ethanol reacts with aqueous sodium mono-oxoio date (l) to give a bright yellow solid with a characteristic smell. The product is?
Options:
A) trichloromethane
B) triodomethane
C) iodoethane
D) ethanal
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The correct answer is B .
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Question 209:
What is the percentage by mass of oxygen in Al2(SO4)3. 2H2O?
[Al = 27, S = 32, H = 1, O = 16]
Options:
A) 14.29%
B) 25.39%
C) 50.79%
D) 59.25%
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The correct answer is D .
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Question 210:
When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as
Options:
A) disintegration
B) polymerization
C) cracking
D) degradation
Show Answer
The correct answer is C .