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Chemistry Mock Test
Chemistry Mock Test (Hard)
Chemical formulas, equations, compounds, and calculations practice for CSCA.
Multiple Choice (10 questions)
1
The complex [CoF6]³? is paramagnetic while [Co(NH3)6]³? is diamagnetic. This is due to:
A. Difference in coordination number
B. NH3 being a weaker field ligand
C. F? being a weaker field ligand
D. F? being a stronger field ligand
Answer:C
2
In the reaction 2A + B ? products, rate = k[A]²[B]. If [A] is doubled and [B] is halved, the rate:
A. Remains same
B.Calcium (Ca)
C.Becomes 1/4
D. Halves
Answer: D.
3
The hybridization of Xe in XeF4 is:
A.sp³d²
B.sp²
C.sp³d
D.sp³
Answer: A.
4
For a first-order reaction, the time for 99.9% completion is about:
A.Half-life
B. Ten times half-life
C. Hundred times half-life
D. Twice half-life
Answer: B.
5
Which has highest covalent character?
A. LiCl
B. NaCl
C. KCl
D. CsCl
Answer: A.
6
The number of isomers for C4H8 (excluding stereoisomers) is:
A. 3
B. 2
C. 5
D. 7
Answer: C.
7
In Freundlich adsorption isotherm, x/m = kP¹/n. For chemical adsorption, n is:
A. 1
B. 0
C. Between 0 and 1
D. Greater than 1
Answer: A.
8
The crystal field splitting energy (?0) is maximum for:
A. [Co(NH3)6]³?
B. [Co(NH3)6]³?
C. [Co(CN)6]³?
D. [Co(H2O)6]³?
Answer: C.
9
“The half-life of a second-order reaction depends on:
A. Neither temperature nor concentration
B. Both temperature and initial concentration
C. Only initial concentration
D. Only temperature
Answer: B. .
10
In the decomposition of H2O2, the role of MnO2 is:
A. Oxidizing agent
B. Catalyst
C. Inhibitor
D. Reducing agent
Answer: B.
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