Q2/10: Assertion (A): Hydrolysis of an ester in an acidic medium is a pseudo first-order reaction. Reason (R): Water is present in a large excess.
Anonymous Quiz
49%
Both A and R are true and R explains A
28%
Both A and R are true but R does not explain A
14%
A is true but R is false
7%
A is false but R is true
2%
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Q3/10: At high pressure, the decomposition of phosphine (PH3) on a tungsten foil follows which order?
Anonymous Quiz
30%
Zero order
37%
First order
22%
Second order
4%
Third order
7%
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Q4/10: If 75% of a first-order reaction is completed in 32 minutes, what is the half-life of the reaction?
Anonymous Quiz
34%
16 minutes
27%
8 minutes
20%
32 minutes
15%
64 minutes
5%
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Q5/10: The rate of a reaction doubles for every 10 degrees C rise in temperature. If the temperature is raised by 50 degrees C, the rate increases by:
Anonymous Quiz
38%
10 times
28%
24 times
18%
32 times
15%
64 times
3%
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Q6/10: Under what condition will a zero-order reaction have a constant rate throughout the process?
Anonymous Quiz
19%
When reactants are completely consumed
30%
When temperature changes constantly
44%
When reactant concentration does not affect rate
5%
When a catalyst is added continuously
2%
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⚡1
Q7/10: The rate constant for a certain reaction is 3 x 10^-4 L mol-1 s-1. What is the order of this reaction?
Anonymous Quiz
31%
Zero order
13%
First order
44%
Second order
5%
Third order
8%
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Q8/10: Which of the following graphical representations corresponds to a first-order reaction?
Anonymous Quiz
8%
[R] vs t is a straight line
44%
ln[R] vs t is a straight line with negative slope
28%
1/[R] vs t is a straight line
17%
t1/2 vs [R]0 is a straight line
3%
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Q9/10: Which is the correct expression for the rate of the reaction: N2 + 3H2 -> 2NH3?
Anonymous Quiz
49%
-d[N2]/dt = -1/3 d[H2]/dt = 1/2 d[NH3]/dt
27%
-d[N2]/dt = 3 d[H2]/dt = 2 d[NH3]/dt
16%
d[N2]/dt = -3 d[H2]/dt = -2 d[NH3]/dt
5%
-d[N2]/dt = -d[H2]/dt = d[NH3]/dt
3%
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⚡2
Q10/10: Threshold energy of a chemical reaction is mathematically equivalent to:
Anonymous Quiz
20%
Activation energy - average kinetic energy
45%
Activation energy + average kinetic energy
27%
Average kinetic energy / Activation energy
7%
Activation energy alone
0%
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✨ Quiz Time! ✨
Answer today's quiz questions and test your knowledge.
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Answer today's quiz questions and test your knowledge.
Every question is a step toward exam success!
FREE Premium PDFs Available Here: acadpills.com/premium
Good luck!
Q1/10: Which of the following transition metals has the lowest melting point?
Anonymous Quiz
9%
Iron
21%
Zinc
47%
Mercury
13%
Copper
10%
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Q2/10: What is the general valence electronic configuration of d-block elements?
Anonymous Quiz
22%
(n-1)d1-10 ns0-2
46%
(n-1)d1-10 ns1-2
22%
(n-1)d1-10 ns2
8%
nd1-10 ns0-2
2%
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Q3/10: Which of the following ions is colorless in an aqueous solution?
Anonymous Quiz
27%
Ti3+
11%
V3+
35%
Cu+
24%
Fe3+
2%
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Q4/10: The highest oxidation state exhibited by any transition element is:
Anonymous Quiz
25%
+6
30%
+7
37%
+8
7%
+9
2%
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Q5/10: Assertion (A): Zinc, cadmium, and mercury are not true transition elements. Reason (R): They have completely filled d-orbitals in their ground state and typical oxidation states.
Anonymous Quiz
48%
Both A and R are true and R explains A
26%
Both A and R are true but R does not explain A
17%
A is true but R is false
7%
A is false but R is true
2%
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Q6/10: Which of the following phenomena is NOT a consequence of lanthanoid contraction?
Anonymous Quiz
30%
Similar atomic sizes of Zr and Hf
19%
Difficulty in separation of lanthanoids
28%
Decreasing basic strength of hydroxides
21%
High melting points of transition metals
2%
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Q7/10: Mischmetall is a well-known alloy consisting predominantly of:
Anonymous Quiz
34%
Lanthanoid metal and iron
32%
Actinoid metal and copper
25%
Zinc and copper
7%
Titanium and aluminum
2%
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Q8/10: Which oxidation state is the most common and stable among the lanthanoids?
Anonymous Quiz
17%
+2
56%
+3
22%
+4
6%
+5
0%
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