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Chemistry MCQ

Introduction to Analytical Chemistry · Maharashtra Board STD 11 (MSBSHSE - Semi English Medium). 23 questions.

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MCQ

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23 questions · auto-graded multiple-choice test.

MCQ 11 Mark
When two properties of a system are mathematically related to each other, the relation can be deduced by
  • A
    Working out mean deviation
  • ✓
    Plotting a graph
  • C
    Calculating relative error
  • D
    all the above three
Answer
Correct option: B.
Plotting a graph
Plotting a graph
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MCQ 21 Mark
In $CuSO _4 5 H _2 O$ the percentage of water is ……(Cu = 63.5, S = 32, O = 16, H = 1)
  • A
    10%
  • ✓
    36%
  • C
    60%
  • D
    72%
Answer
Correct option: B.
36%
36%
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MCQ 31 Mark
How many grams of oxygen will be required to react completely with 27 g of Al? (Atomic mass : Al = 27, O = 16)
  • A
    8
  • B
    16
  • ✓
    24
  • D
    32
Answer
Correct option: C.
24
24
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MCQ 41 Mark
The hydrocarbon contains 79.87 % carbon and 20.13 % of hydrogen. What is its empirical formula ?
  • A
    CH
  • B
    CH2
  • ✓
    CH3
  • D
    C2H5
Answer
Correct option: C.
CH3
CH3
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MCQ 51 Mark
Two elements A (At. mass 75) and B (At. mass 16) combine to give a compound having 75.8 % of A. The formula of the compound is
  • A
    $A B$
  • B
    $A _2 B$
  • C
    $AB _2$
  • ✓
    $A _2 B_3$
Answer
Correct option: D.
$A _2 B_3$
$A _2 B_3$
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MCQ 61 Mark
How many grams of water will be produced by complete combustion of 12g of methane gas
  • A
    16
  • ✓
    27
  • C
    36
  • D
    56
Answer
Correct option: B.
27
27
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MCQ 71 Mark
By decomposition of 25 g of CaCO3, the amount of CaO produced will be ……………….
  • A
    2.8 g
  • B
    8.4 g
  • ✓
    14.0 g
  • D
    28.0 g
Answer
Correct option: C.
14.0 g
14.0 g
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MCQ 81 Mark
In Avogadro’s constant $6.022 \times 10^{23} mol^{-1}$, the number of significant figures is ……….
  • A
    3
  • ✓
    4
  • C
    5
  • D
    6
Answer
Correct option: B.
4
4
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MCQ 91 Mark
The number of significant figures in $1.50 \times 10^4 g$ is ………..
  • A
    2
  • ✓
    3
  • C
    4
  • D
    6
Answer
Correct option: B.
3
3
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MCQ 111 Mark
Which one of the following property of matter is Not quantitative in nature ?
  • A
    Mass
  • B
    Length
  • ✓
    Colour
  • D
    Volume
Answer
Correct option: C.
Colour
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MCQ 121 Mark
The branch of chemistry which deals with the study of separation, identification and quantitative determination of the composition of different substances is called………………..
  • A
    Physical chemistry
  • B
    Inorganic chemistry
  • C
    Organic chemistry
  • ✓
    Analytical chemistry
Answer
Correct option: D.
Analytical chemistry
Analytical chemistry
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MCQ 131 Mark
Molality of a solution is the __________
  • ✓
    number of moles of solute present in 1 kg of solvent
  • B
    number of moles of solute present in 1 L of solution
  • C
    mass of solute present in 1 kg of solvent
  • D
    number of moles of solute present in 1 kg of solution
Answer
Correct option: A.
number of moles of solute present in 1 kg of solvent
number of moles of solute present in 1 kg of solvent
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MCQ 141 Mark
$0.9$ glucose $(C_6H_{12}O_6)$ is present in $1 \ L$ of solution. Find molarity.
  • A
    $5 \ M$
  • B
    $50 \ M$
  • ✓
    $0.005 \ M$
  • D
    $0.5 \ M$
Answer
Correct option: C.
$0.005 \ M$
$0.005 \ M$
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MCQ 151 Mark
If a solution is made up of 1 mol ethanol and 9 mol water, then mole fraction of water in the solution is ___________
  • A
    0.1
  • B
    0.5
  • ✓
    0.9
  • D
    1.0
Answer
Correct option: C.
0.9
0.9
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MCQ 161 Mark
___________ reagent is the reactant that reacts completely but limits further progress of the reaction.
  • A
    Oxidizing
  • B
    Reducing
  • ✓
    Limiting
  • D
    Excess
Answer
Correct option: C.
Limiting
Limiting
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MCQ 171 Mark
1.2 g of Mg (At. mass 24) will produce MgO equal to _____________
  • ✓
    0.05 mol
  • B
    0.03 mol
  • C
    0.01 mol
  • D
    0.02 mol
Answer
Correct option: A.
0.05 mol
0.05 mol
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MCQ 191 Mark
The molecular mass of an organic compound is $78 \ g \ mol^{-1}.$ Its empirical formula is $CH.$ The molecular formula is ____________
  • A
    $C_2H_4$
  • B
    $C_2H_2$
  • ✓
    $C_6H_6$
  • D
    $C_4H_4$
Answer
Correct option: C.
$C_6H_6$
$C_6H_6$
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MCQ 201 Mark
The $\%$ of $H_2O$ in $Fe(CNS)_3.3H_2O$ is ___________
  • A
    $34$
  • B
    $11$
  • ✓
    $19$
  • D
    $46$
Answer
Correct option: C.
$19$
$19$
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MCQ 211 Mark
18.238 is rounded off to four significant figures as ___________
  • A
    18.20
  • B
    18.23
  • C
    18.2360
  • ✓
    18.24
Answer
Correct option: D.
18.24
18.24
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MCQ 221 Mark
For the following measurements in which the true value is 4.0 g, find the CORRECT statement.
StudentReadings (g)
A4.013.99
B4.053.95
  • A
    Results of both the students are neither accurate nor precise.
  • ✓
    Results of student A are both precise and accurate.
  • C
    Results of student A are neither precise nor accurate.
  • D
    Results of student B are both precise and accurate.
Answer
Correct option: B.
Results of student A are both precise and accurate.
Results of student A are both precise and accurate.
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