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MHT - CET MCQ

MHT CET Chemistry Model Test 01 · Maharashtra Board STD 12 Science (MSBSHSE - English Medium). 50 questions.

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50 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Which is the gas evolved when carboxylic acids react with strongly electropositive metals (such as Na, K, Ca, Zn)?
  • ✓
    $\mathrm{H}_2$
  • B
    $\mathrm{H}_2 \mathrm{O}$ vapour
  • C
    $\mathrm{O}_2$
  • D
    $\mathrm{CO}_2$
Answer
Correct option: A.
$\mathrm{H}_2$
A. $\mathrm{H}_2$
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MCQ 21 Mark
Which of the following compounds yields 3-Ethylpentan-3-ol by using ethyl magnesium iodide followed by acid hydrolysis?
  • ✓
    Pentan-3-one
  • B
    Propanone
  • C
    Pentan-2-one
  • D
    Butanone
Answer
Correct option: A.
Pentan-3-one
A
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MCQ 31 Mark
Rosenmund reduction of ____________ yields benzaldehyde.
  • A
    benzyl alcohol
  • B
    benzoic acid
  • ✓
    benzoyl chloride
  • D
    cyclohexanecarbaldehyde
Answer
Correct option: C.
benzoyl chloride
C
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MCQ 41 Mark
Which of the following is a mixed ketone?
  • A
    Acetone
  • B
    Pentan-3-one
  • C
    Benzophenone
  • ✓
    Butanone
Answer
Correct option: D.
Butanone
D
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MCQ 51 Mark
Which of the following on oxidation yields ethyl methyl ketone?
  • A
    Propan-2-ol
  • B
    Butan-1-ol
  • ✓
    Butan-2-ol
  • D
    2-Methylpropan-2-ol
Answer
Correct option: C.
Butan-2-ol
C
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MCQ 61 Mark
(I)

Image

(II) $\ce{P + Zn ->[\Delta] Q}$

(III) $\ce{P ->[Na2Cr2O7][H2SO4] R}$

Q and R are respectively:

  • ✓
    benzene and benzoquinone
  • B
    benzene and salicylic acid
  • C
    benzoquinone and phenol
  • D
    phenol and benzoic acid
Answer
Correct option: A.
benzene and benzoquinone
A
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MCQ 71 Mark
$\ce{CH3 - CH = CH2 ->[HBr][Peroxide] A}$

Identify A.

  • ✓
    n-propyl bromide
  • B
    2-bromopropene
  • C
    isopropyl bromide
  • D
    1-bromopropene
Answer
Correct option: A.
n-propyl bromide
A
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MCQ 81 Mark
Which alcohol is difficult to oxidise?
  • ✓
    2-Methylpropan-2-ol
  • B
    Methanol
  • C
    Butan-1-ol
  • D
    Propan-2-ol
Answer
Correct option: A.
2-Methylpropan-2-ol
A
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MCQ 91 Mark
When phenol is oxidised with chromic anhydride or sodium dichromate in the presence of $\mathrm{H}_2 \mathrm{SO}_4$, ____________ is formed.
  • A
    pyrogallol
  • B
    quinine
  • ✓
    p-benzoquinone
  • D
    p-hydroquinone
Answer
Correct option: C.
p-benzoquinone
C. p-benzoquinone
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MCQ 121 Mark
Which ligand among the following has highest splitting power of d-orbitals of central metal ion?
  • ✓
    CO
  • B
    NCS
  • C
    $OH^-$
  • D
    $S^{2-}$
Answer
Correct option: A.
CO
A. CO
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MCQ 131 Mark
The coordination number and oxidation state of Cr in $\mathrm{K}_3\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$ are respectively ____________.
  • ✓
    6 and +3
  • B
    3 and 0
  • C
    4 and +2
  • D
    3 and +3
Answer
Correct option: A.
6 and +3
A. 6 and +3
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MCQ 141 Mark
Which is the INCORRECT property of lanthanoids?
  • ✓
    Very high electronegativity
  • B
    Soft metals with silvery white colour
  • C
    Moderate densities of about 7 g $cm^{-3}$
  • D
    High coordination number in complexes
Answer
Correct option: A.
Very high electronegativity
A. Very high electronegativity
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MCQ 151 Mark
Which of the following elements belongs to first inner transition series?
  • A
    Pu
  • ✓
    Pr
  • C
    Fm
  • D
    Bk
Answer
Correct option: B.
Pr
B
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MCQ 161 Mark
Identify the INCORRECT statement about d-block elements.
  • A
    They are lustrous and shining.
  • B
    They are hard and have high density.
  • ✓
    They have low tensile strength.
  • D
    They are efficient catalysts.
Answer
Correct option: C.
They have low tensile strength.
C
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MCQ 171 Mark
The mixture used for artificial breathing by asthma patients:
  • A
    He and $\mathrm{H}_2
  • ✓
    He and $\mathrm{O}_2$
  • C
    He and $\mathrm{N}_2$
  • D
    Ne and $\mathrm{O}_2$
Answer
Correct option: B.
He and $\mathrm{O}_2$
B. He and $\mathrm{O}_2$
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MCQ 181 Mark
Which of the following interhalogen is a pale brown gas at room temperature?
  • A
    $\mathrm{ICl}_3$
  • ✓
    BrF
  • C
    $\mathrm{ClF}_7$
  • D
    $\mathrm{ClF}_3$
Answer
Correct option: B.
BrF
B. BrF
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MCQ 191 Mark
Carnallite contains the element ____________.
  • ✓
    chlorine
  • B
    sulfur
  • C
    sodium
  • D
    fluorine
Answer
Correct option: A.
chlorine
A
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MCQ 201 Mark
The mass of sulphur dioxide produced by burning 32 g of sulphur in excess of oxygen in contact process is ____________ g.

(Average atomic mass: S = 32 u, O = 16 u).

  • A
    160
  • ✓
    64
  • C
    32
  • D
    128
Answer
Correct option: B.
64
B
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MCQ 211 Mark
What is the oxidation state of chlorine atom in hypochlorous acid?
  • A
    +2
  • ✓
    +1
  • C
    −1
  • D
    +3
Answer
Correct option: B.
+1
B
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MCQ 221 Mark
The molecular formula of metaperiodic acid is ____________.
  • A
    HIO
  • ✓
    $\mathrm{H}_2 \mathrm{IO}_6$
  • C
    $\mathrm{HIO}_3$
  • D
    $\mathrm{HIO}_4$
Answer
Correct option: B.
$\mathrm{H}_2 \mathrm{IO}_6$
B. $\mathrm{H}_2 \mathrm{IO}_6$
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MCQ 231 Mark
Which of the following statements are TRUE?
  • A
    HBr is a liquid at room temperature.
  • B
    $\mathrm{SbCl}_3$ is more covalent than $\mathrm{SbCl}_5$.
  • C
    $\mathrm{SeO}_2$ is amphoteric in nature.
  • ✓
    In $\mathrm{SeCl}_2$, there are two lone pairs of electrons on the central atom.
Answer
Correct option: D.
In $\mathrm{SeCl}_2$, there are two lone pairs of electrons on the central atom.
D. In $\mathrm{SeCl}_2$, there are two lone pairs of electrons on the central atom.
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MCQ 241 Mark
In group 16, atomic radii ____________ down the group while atomic radii ____________ across a period.
  • A
    decreases, decreases
  • B
    decreases, increases
  • ✓
    increases, decreases
  • D
    increases, increases
Answer
Correct option: C.
increases, decreases
C
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MCQ 251 Mark
Which of the following is a character of catalyst?
  • A
    It affects the energies of reactants and products of the reaction.
  • B
    It increases the activation energy of reactants.
  • C
    It changes the position of equilibrium.
  • ✓
    lt increases the rates of both forward and backward reactions equally in reversible reaction.
Answer
Correct option: D.
lt increases the rates of both forward and backward reactions equally in reversible reaction.
D
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MCQ 261 Mark
The order of the reaction for which the unit of rate constant is $s^{-1}$ is ____________.
  • A
    0
  • B
    2
  • C
    3
  • ✓
    1
Answer
Correct option: D.
1
D. 1
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MCQ 271 Mark
For the reaction $\ce{2A + B -> 3C + D}$, which among the following is NOT the correct rate law expression?
  • A
    `("d"["D"])/("dt")`
  • ✓
    `- ("d"["C"])/(3 "dt")`
  • C
    `- ("d"["B"])/("dt")`
  • D
    `- ("d"["A"])/(2 "dt")`
Answer
Correct option: B.
`- ("d"["C"])/(3 "dt")`
B
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MCQ 281 Mark
The rate of disappearance of $\mathrm{SO}_2$ in the reaction $2 \mathrm{SO}_2+\mathrm{O}_2 \longrightarrow 2 \mathrm{SO}_3$ is $1.28 \times 10^{-3} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$. Then the rate of formation of $\mathrm{SO}_3$ is _____________ $\mathrm{mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$.
  • A
    $0.80 \times 10^{-3}$
  • ✓
    $1.28 \times 10^{-3}$
  • C
    $0.64 \times 10^{-3}$
  • D
    $1.60 \times 10^{-3}$
Answer
Correct option: B.
$1.28 \times 10^{-3}$
B. $1.28 \times 10^{-3}$
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MCQ 291 Mark
A single vertical line is used to denote __________ in the cell notation of galvanic cell.
  • A
    anode
  • ✓
    phase boundary
  • C
    cathode
  • D
    salt bridge
Answer
Correct option: B.
phase boundary
B
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MCQ 301 Mark
What is the value of cell constant if conductance and conductivity of a solution is same?
  • ✓
    $1.0 \mathrm{~cm}^{-1}$
  • B
    $0.1 \mathrm{~cm}^{-1}$
  • C
    $10.0 \mathrm{~cm}^{-1}$
  • D
    $0.5 \mathrm{~cm}^{-1}$
Answer
Correct option: A.
$1.0 \mathrm{~cm}^{-1}$
A. $1.0 \mathrm{~cm}^{-1}$
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MCQ 311 Mark
In how many of the following, ∆S is positive?
i. Melting of ice
ii. Sublimation of iodine
iii. Dissolution of $\mathrm{CuSO}_4$ in water
iv. Condensation of water vapour
v. Dissociation of $\mathrm{H}_2$ molecule into atoms
vi. Conversion of carbon dioxide gas to dry ice
vii. Vaporization of acetone
  • A
    4
  • B
    3
  • ✓
    5
  • D
    2
Answer
Correct option: C.
5
C. 5
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MCQ 321 Mark
The standard enthalpy of formation of ammonia is $-46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The enthalpy change for the reaction:$\ce{2NH3_{(g)} -> 2N2_{(g)} + 3H2_{(g)}}$ is ____________.
  • A
    $46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
  • B
    $-23.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
  • ✓
    $92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
  • D
    $-92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
Answer
Correct option: C.
$92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
C. $92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
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MCQ 331 Mark
$30 \times 10^{-4}$ kg urea dissolved in water to make 500 mL aqueous solution and it is isotonic with cane sugar solution. What quantity of cane sugar is present in it's 1 lit. solution?
(At mass: H =I, N = 14, 0 = 16, C = 12)
  • ✓
    34.2 g
  • B
    17.1 g
  • C
    3.42 g
  • D
    171 g
Answer
Correct option: A.
34.2 g
A. 34.2 g
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MCQ 341 Mark
3.795 g of sulphur is dissolved in 100 g of $\mathrm{CS}_2$. This solution boils at 319.81 K . The boiling point of $\mathrm{CS}_2$ is 319.45 K . The molecular formula of sulphur in solution is ____________ . (Given that $\mathrm{K}_{\mathrm{b}}$ for $\mathrm{CS}_2=2.42 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$ and atomic mass of $S=32 \mathrm{u})$
  • A
    $S_4$
  • B
    $S_{10}$
  • ✓
    $S_8$
  • D
    $S_6$
Answer
Correct option: C.
$S_8$
C. $S_8$
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MCQ 351 Mark
What will be the molar mass of solute if vapour pressure of pure benzene is 450 mm Hg when 1.5 g of non-volatile solute is added to 30 g of benzene?
(Vapour pressure of solution= 400 mm Hg, Atomic mass C = 12, H = 1)
  • ✓
    $35.1 g mol ^{-1}$
  • B
    $26.1 g mol ^{-1}$
  • C
    $28.4 g mol ^{-1}$
  • D
    $30.0 g mol ^{-1}$
Answer
Correct option: A.
$35.1 g mol ^{-1}$
A
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MCQ 361 Mark
0.5 molal aqueous solution of a weak acid (HX) is 20% Ionized. If Kr of water is $1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$, the lowering in freezing point of solution is ______.
  • A
    - 0.56 K
  • ✓
    1.12 K
  • C
    - 1.12 K
  • D
    0.56 K
Answer
Correct option: B.
1.12 K
B. 1.12 K
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MCQ 371 Mark
Sea water is a homogeneous mixture of ____________ type of solution.
  • A
    solid in gas
  • B
    solid in solid
  • C
    gas in solid
  • ✓
    solid in liquid
Answer
Correct option: D.
solid in liquid
D
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MCQ 381 Mark
In two dimensional AAAA type packing, the coordination number of each sphere is ____________.
  • A
    2
  • B
    12
  • ✓
    4
  • D
    6
Answer
Correct option: C.
4
C
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MCQ 391 Mark
Which is the number of atoms in $12.08 \times 10^{23}$ unit cells if an element crystallizes in bcc structure?
  • A
    $2.08 \times 10^{22}$
  • ✓
    $2.416 \times 10^{24}$
  • C
    $4.838 \times 10^{24}$
  • D
    $1.208 \times 10^{23}$
Answer
Correct option: B.
$2.416 \times 10^{24}$
B. $2.416 \times 10^{24}$
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MCQ 401 Mark
Select the INCORRECT match:
  • A
    Molecular solid: $SO_2$
  • B
    Covalent network solid: Graphite
  • C
    Metallic solid: Mg
  • ✓
    Ionic solid: Cu
Answer
Correct option: D.
Ionic solid: Cu
D. Ionic solid: Cu
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MCQ 411 Mark
The cracking of propane yields ____________.
  • A
    propene and $H_2$
  • B
    ethane and methane
  • C
    ethene and ethane
  • ✓
    ethene and methane
Answer
Correct option: D.
ethene and methane
D. ethene and methane
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MCQ 421 Mark
IUPAC name of

$\begin{array}{cc}
\ce{C2H5 - CH2 - C(Cl) - C2H5}\\
\phantom{...}|\\
\phantom{......}\ce{C2H5}
\end{array}$

  • A
    3-chloro-2-ethylpentane
  • B
    2-chloro-3-ethylhexane
  • C
    2-ethyl-3-chloropentane
  • ✓
    3-chloro-3-ethylhexane
Answer
Correct option: D.
3-chloro-3-ethylhexane
D
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MCQ 431 Mark
Froth and whipped cream are examples of ____________.
  • A
    emulsion
  • B
    gel
  • C
    aerosol
  • ✓
    foam
Answer
Correct option: D.
foam
D
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MCQ 441 Mark
The volume of $400 \mathrm{~cm}^3$ chlorine gas at 400 mm of Hg is decreased to $200 \mathrm{~cm}^3$ at constant temperature. What is the new pressure of gas?
  • A
    1600 mm of Hg
  • ✓
    800 mm of Hg
  • C
    600 mm of Hg
  • D
    200 mm of Hg
Answer
Correct option: B.
800 mm of Hg
B. 800 mm of Hg
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MCQ 451 Mark
Alkaline hydrolysis of which among the following compounds leads to the formation of a racemate?
  • A
    1-Chloropropane
  • B
    Bromomethane
  • C
    1-Chlorobutane
  • ✓
    2-Chloro-2-phenylbutane
Answer
Correct option: D.
2-Chloro-2-phenylbutane
D
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MCQ 461 Mark
In the complex $\left[\mathrm{Co}(\mathrm{en})_3\right] \mathrm{Cl}_3$, ____________.
  • A
    charge on the complex ion is 0
  • B
    coordination number of Co is 3
  • ✓
    oxidation number of Co is +3
  • D
    coordination sphere is $Cl^-$
Answer
Correct option: C.
oxidation number of Co is +3
C. oxidation number of Co is +3
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MCQ 471 Mark
Among the following MOs, the highest energy MO that is occupied by electrons in case of $\mathrm{N}_2$ molecule is ____________.
  • A
    $\sigma^{\star} 2 s$
     
  • B
    $\pi 2 p_y$
  • C
    $\pi^* 2 P_x$
  • ✓
    $\sigma 2 p_z$
Answer
Correct option: D.
$\sigma 2 p_z$
D. $\sigma 2 p_z$
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MCQ 491 Mark
____________ is an example of molecule with expanded octet.
  • A
    $\mathrm{NO}_2$
  • B
    $\mathrm{SCl}_2$
  • ✓
    $\mathrm{SF}_6$
  • D
    LiCl
Answer
Correct option: C.
$\mathrm{SF}_6$
C. $\mathrm{SF}_6$
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MCQ 501 Mark
The volume of oxygen required for complete combustion of 0.25 mole of methane at S.T.P. is ______.
  • ✓
    $11.2 \mathrm{~dm}^3$
  • B
    $22.4 \mathrm{~dm}^3$
  • C
    $7.46 \mathrm{~dm}^3$
  • D
    $5.6 \mathrm{~dm}^3$
Answer
Correct option: A.
$11.2 \mathrm{~dm}^3$
A. $11.2 \mathrm{~dm}^3$
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