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 341: Neutralization involves a reaction between H3O+ and?
Options:
A) CI-
B) OH-
C) NO3-
D) CO32-
Show Answer
The correct answer is B .
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Question 342:
How many pi () bonds are there in an alkene with six carbon atoms?
Options:
A) 4
B) 6
C) 5
D) 3
Show Answer
The correct answer is D .
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Question 343: In the oil drop experiment, Millikan determined the?
Options:
A) charge to mass ratio of the electron
B) mass of the electron
C) charge of the electron
D) mass of the proton
Show Answer
The correct answer is C .
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Question 344: The major source of oxides of nitrogen is from the burning of
Options:
A) coal
B) wood
C) fuel
D) chlrofluorocarbons
Show Answer
The correct answer is C .
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Question 345: When glowing splint is inserted into the mouth of a jar containing a gas, the splint is extinguished. The gas gives a white precipitate when passing into barium hydroxide. The gas is?
Options:
A) methane
B) hydrogen chloride
C) hydrogen
D) nitrogen
E) carbondioxide
Show Answer
The correct answer is E .
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Question 346: In the laboratory preparation of ethyl ethanoate, the water present in the mixture is removed using a solution of
Options:
A) an hydrous CaCl4
B) concentrated NaCO4
C) dilute NaOH
D) concentrated H4SO4
Show Answer
The correct answer is D .
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Question 347: A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?
Options:
A) S dissolves in the solution
B) crystals of R are precipitated
C) there is no observable change
D) R and S react to generate heat
Show Answer
The correct answer is B .
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Question 348: The conversion of open chain alkanes into cycloalkanes and aromatic compounds is called
Options:
A) cracking
B) reforming
C) isomerization
D) polymerization
Show Answer
The correct answer is B .
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Question 349:
NO⇔ 2NO ( = -ve)
From the reaction above, which of these conditions would produce the highest equilibrium yield forNO?
Options:
A) Low temperature and high pressure
B) Low temperature and low pressure
C) high temperature and low pressure
D) high temperature and high pressure
Show Answer
The correct answer is A .
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Question 350: The dispersion of a liquid in a liquid medium will give
Options:
A) an emulsion
B) a fog
C) a gel
D) an aerosol
Show Answer
The correct answer is A .