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 671: In the reaction 1O-3 + 5l- + 6H+ → 312 + 3H2O, the oxidizing agent is?
Options:
A) H+
B) l-
C) 1O-
D) l2
Show Answer
The correct answer is C .
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Question 672:
Which type of salt is found in antacid medications and is used to relieve heartburn and indigestion?
Options:
A) Aluminum chloride
B) Magnesium chloride
C) Sodium chloride
D) Calcium chloride
Show Answer
The correct answer is B .
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Question 673: How many lone pairs of electron are there on the central atom of the H2O molecules?
Options:
A) 1
B) 2
C) 3
D) 4
Show Answer
The correct answer is B .
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Question 674: Consider the following equation H2O + 2Fe2+ + Cl2 ↔ 2Fe3+ + 2Cl- + H2O. The only ion which behaves as an oxidising agent is
Options:
A) Fe2+
B) Cl2
C) Fe3+
D) Cl-
E) H2O
Show Answer
The correct answer is B .
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Question 675: An oxide XO2 has a vapour density of 32. What is the atomic mass of X?
Options:
A) 32
B) 20
C) 14
D) 12
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The correct answer is A .
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Question 676: The solvent used for removing grease stain is
Options:
A) turpentine
B) ammonia solution
C) ethanol
D) solution of borax in water
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The correct answer is B .
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Question 677: The modern process of manufacturing steel for iron is by
Options:
A) treatment with acids
B) oxidation
C) blast reduction
D) treatment with alkanal
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The correct answer is C .
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Question 678:
In electrovalency, the oxidation number of the participating metal is always
Options:
A) decreasing
B) increasing
C) constant
D) neutral
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The correct answer is C .
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Question 679:
Duralumin consists of aluminum, copper?
Options:
A) Zinc and Gold
B) Lead and Manganese
C) Nickel and Silver
D) Manganese and Magnesium
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The correct answer is D .
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Question 680: The pair of organic compounds that are isomers is
Options:
A) Benzene and methylbenzene
B) Trichloromethane and tetrachloromethane
C) Ethanol and propane
D) But-1-ene and but-2-ene
Show Answer
The correct answer is D .