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 521:
The compound above is an
Options:
A) ether
B) ester
C) alkanal
D) alkanol
Show Answer
The correct answer is B .
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Question 522: 2- methylbutan- 2ol is an example of a
Options:
A) dihydric alkanol
B) tertiary alkanol
C) secondary alkanol
D) primary alkanol
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The correct answer is B .
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Question 523: What is the pH of 0.001 mol dm-3 solution of sodium hydroxide
Options:
A) 14
B) 13
C) 12
D) 11
Show Answer
The correct answer is D .
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Question 524: If 24.83 cm3 of 0.15 M NaOH is titrated to its end point with 39.45 cm3 of HCl, what is the molarity of the HCl?
Options:
A) 0.094 M
B) 0.150 M
C) 0.940 M
D) 1.500 M
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The correct answer is A .
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Question 525: 3. 06 g of a sample of potassium trioxochlorate (V) (KCIO) was required to make a saturated solution with 10cm3 of water at 25oC. The solubility of the salt at 25oC is [K =39, Cl = 35.5, O = 16]
Options:
A) 5.0 moles dm3
B) 3.0 moles dm3
C) 2.5 moles dm3
D) 1.0 molesv
E) 0.5 moles dm3
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The correct answer is C .
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Question 526: Which of the following in aqueous solution is neutral to litmus?
Options:
A) NH4CI
B) NaCO3
C) FeCl3
D) NaCl
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The correct answer is D .
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Question 527: The principal constituent of natural gas is
Options:
A) methane
B) ethane
C) propane
D) Butane
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The correct answer is A .
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Question 528: Which of these represents a redox reaction?
Options:
A) AgNO3 + NaCl → AgCAl + NaNO3
B) H2S + Pb(NO3) → PbS + 2HNO3
C) CaCO3 → CaO + CO2
D) Zn + 2HCl → ZnCl2 + H2
Show Answer
The correct answer is D .
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Question 529:
Which of the following gases will diffuse fastest when passed through a porous plug?
[H = 1, C = 12, N = 14, O = 16]
Options:
A) Propane
B) Oxygen
C) Methane
D) Ammonia
Show Answer
The correct answer is C .
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Question 530:
What type of reaction is involved in the formation of alkanols from alkenes?
Options:
A) Elimination reaction
B) Redox reaction
C) Substitution reaction
D) Addition reaction
Show Answer
The correct answer is D .