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 351: An acid is said to be weak if?
Options:
A) its ions are so completely dissociated that they easily drift apart
B) the acid is not corrosive
C) the acid has low specific gravity
D) its ions move very slowly when in solution
E) its ions are incompletely dissociated
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The correct answer is E .
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Question 352: In titration involving sodium hydroxide and dilute hydrochloric acid, where would you place the base?
Options:
A) in the beaker
B) in the conical flask
C) in a burette
D) in the standard flask
E) in the measuring cylinder
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The correct answer is B .
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Question 353: PCL5(g)= PCL3(g) + Cl2(g)In the reaction above, a decrease in pressure will
Options:
A) Decelerate the reaction
B) Increase yield of Pcl3
C) Increase the yield of Pcl5
D) Accurate the reaction
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The correct answer is B .
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Question 354:
The diagram above best illustrates the effect of decrease in
Options:
A) concentration
B) temperature
C) surface area
D) pressure
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The correct answer is A .
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Question 355: Given the reactions (i) Fe(s) + X(NO3)2(aq) → Fe(NO3) + X(s) (ii) H2(g) + XO → X + H2O(s); X is likely to be?
Options:
A) copper
B) zinc
C) calcium
D) lead
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The correct answer is A .
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Question 356: Which of the following statements is correct during the electrolysis of a caustic soda solution using platinum electrodes?
Options:
A) Oxygen gas is given off at the cathode
B) Hydrogen gas is given of at the anode
C) Sodium metals is deposited at the anode
D) Sodium metal is deposited at the cathode
E) AAlkalinity at the cathode increases
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The correct answer is E .
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Question 357:
Which of the curves above represents the behaviour of 1 mole of an ideal gas?
Options:
A) l
B) ll
C) lll
D) lV
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The correct answer is C .
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Question 358: Local black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the?
Options:
A) acid
B) ester of allanoic acid
C) alkali
D) alkanol
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The correct answer is C .
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Question 359: Duralumin consists of aluminium, copper, ?
Options:
A) zinc and gold
B) lead and maganese
C) nickle and silver
D) manganese and magnesium
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The correct answer is D .
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Question 360: Terylene is synthesized from ethane- 1, 2-diol and benzene - 1, 4-dicarboxylic acid by?
Options:
A) addition reaction
B) condensation reaction
C) elimination reaction
D) substitution reaction
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The correct answer is B .