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 381: The acid in electrolysis of water is dilute
Options:
A) HNO3
B) CH3COOH
C) H2SO
D) HCl
Show Answer
The correct answer is C .
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Question 382: When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes
Options:
A) negatively charged
B) positvely charged
C) neutral
D) bipolar
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The correct answer is A .
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Question 383: Which of the following substances are all made by the process of polymerization?
Options:
A) Nylon and soap
B) Ethanoic acid margarine and ethanol
C) Nylon and artificial rubber
D) Soap and butane
E) Margarine and nylon
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The correct answer is C .
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Question 384:
What is the IUPAC name for the following compound? HCCCH
Options:
A) Acetylene
B) Methyl acetylene
C) Butanol
D) Decanoic acid
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The correct answer is B .
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Question 385: Which of the following is used as fuel in miners' lamp?
Options:
A) Ethanal
B) Ethyne
C) Ethene
D) Ethane
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The correct answer is B .
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Question 386: Which of the following elements will form oxide which will dissolve both in dilute HNO3 and NaOH solutions to form salts?
Options:
A) Al
B) Mg
C) Ag
D) Mn
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The correct answer is A .
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Question 387: The mathematical expression of PH is
Options:
A) log 10[OH-]
B) log 101/[H 3 O+]
C) log 10[H 3 O+]
D) log 101/[OH -]
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The correct answer is B .
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Question 388: The property which makes alcohol soluble in water is the
Options:
A) boiling point
B) hydrogen bonding
C) ionic character
D) covalent nature
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The correct answer is B .
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Question 389: The alloy duralumin is used for the building of aeroplanes because it?
Options:
A) asborbs heat readily from sure thereby preventing the inside of the plane from getting cold at high attitudes
B) reflects sunlight readily, thereby keeping the inside of the plane cool
C) is extremely durable and possesses reflective ability
D) is easily the lightest building material
E) possesses both strenght and lightness
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The correct answer is E .
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Question 390:
The equilibrium reaction between copper (l) chloride and chlorine at 25oC and 1 atmosphere is represented by the equation:
2CuCl +Cl2 ⇌ 2 CuCl2 ∆H = - 166 KJ. Which of the following statements is TRUE for the reaction, pressure remaining constant?
Options:
A) more CuCl is formed at 40oC
B) more CuCl2 is formed at 10oC
C) Less CuCl2 is formed at 10oC
D) there is no change in the amount of CuCl2 formed at 40oC and10oC
E) more CuCl is consumed at 40oC
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The correct answer is B .