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Chemistry M.C.Q (1 Marks)

p- Block Elements · Rajasthan Board (RBSE) STD 12 Science (Rajasthan - English Medium). 70 questions.

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M.C.Q (1 Marks)

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70 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Which of the following catalysts is used in the manufacture of ammonia by Haber's process?
  • A
    $ Al_{2}O_{3} $
  • ✓
    $ Fe + Mo $
  • C
    CuO
  • D
    Pt
Answer
Correct option: B.
$ Fe + Mo $
B
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MCQ 21 Mark
Which of the following is the molecular formula of Orthophosphoric acid?
  • A
    $ H_{3}PO_{3} $
  • ✓
    $ H_{3}PO_{4} $
  • C
    $ HPO_{3} $
  • D
    $ H_{4}P_{2}O_{7} $
Answer
Correct option: B.
$ H_{3}PO_{4} $
B
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MCQ 41 Mark
Which of the following oxides of nitrogen is called laughing gas?
  • A
    Nitric oxide
  • ✓
    Nitrous oxide
  • C
    Dinitrogen trioxide
  • D
    Dinitrogen pentoxide
Answer
Correct option: B.
Nitrous oxide
B
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MCQ 51 Mark
Which of the following elements has electronic configuration $1 s^2 2 s^2 2 p x^1 2 p y^1 2 p z^1$
  • A
    Oxygen
  • B
    Hydrogen
  • ✓
    Nitrogen
  • D
    Fluorine
Answer
Correct option: C.
Nitrogen
C
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MCQ 61 Mark
Which one of the following is the main product of the reaction $ CHCl_{3} + O_{2} \xrightarrow{\text{Light}} \dots + HCl $?
  • A
    $ CO_{2} $
  • B
    $ Cl_{2} $
  • ✓
    $ COCl_{2} $
  • D
    None of these
Answer
Correct option: C.
$ COCl_{2} $
C
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MCQ 81 Mark
The element of group 16 are known as:
  • A
    Halogens
  • ✓
    Chalcogens
  • C
    Transition elements
  • D
    Moble gases
Answer
Correct option: B.
Chalcogens
B
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MCQ 91 Mark
Chlorine reacts with excess of ammonia to form:
  • A
    $ NH_{4}Cl $
  • B
    $ N_{2} + HCl $
  • ✓
    $ N_{2} + NH_{4}Cl $
  • D
    $ N_{2} + NCl_{3} $
Answer
Correct option: C.
$ N_{2} + NH_{4}Cl $
C
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MCQ 111 Mark
What is the formula of Oleum?
  • ✓
    $ H_{2}S_{2}O_{7} $
  • B
    $H _2 SO _4$
  • C
    $ H_{2}SO_{3} $
  • D
    $ H_{2}SO_{5} $
Answer
Correct option: A.
$ H_{2}S_{2}O_{7} $
A
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MCQ 121 Mark
Nitric acid is prepared by:
  • A
    Contact process
  • ✓
    Ostwald's method
  • C
    Photosynthesis
  • D
    Haber's process
Answer
Correct option: B.
Ostwald's method
B
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MCQ 131 Mark
$ PCl_{5} $ is a:
  • ✓
    Oxidising agent
  • B
    Reducing agent
  • C
    Oxidizing and reducing agent both
  • D
    None
Answer
Correct option: A.
Oxidising agent
A
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MCQ 141 Mark
Which of the following gas cannot be collected over water?
  • A
    $ O_{2} $
  • B
    $ H_{2}S $
  • ✓
    $ SO_{2} $
  • D
    $ N_{2} $
Answer
Correct option: C.
$ SO_{2} $
C
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MCQ 151 Mark
The formula of Nitric acid is:
  • ✓
    $ HNO_{3} $
  • B
    $ H_{2}N_{2}O_{2} $
  • C
    $ HNO_{2} $
  • D
    $ HNO_{4} $
Answer
Correct option: A.
$ HNO_{3} $
A
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MCQ 161 Mark
Group I elements of Periodic Table are known as:
  • ✓
    Alkali metals
  • B
    Alkaline earth metals
  • C
    Inert gas
  • D
    None
Answer
Correct option: A.
Alkali metals
A
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MCQ 181 Mark
The hybridisation of N in $ NH_{3} $ is:
  • ✓
    $ sp^{3} $
  • B
    $ sp^{2} $
  • C
    sp
  • D
    $ d^{2}sp^{3} $
Answer
Correct option: A.
$ sp^{3} $
A
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MCQ 191 Mark
Oleum is composed of $ H_{2}SO_{4} $ and which constituent?
  • A
    $ SO_{2} $
  • ✓
    $ SO_{3} $
  • C
    $ H_{2}S $
  • D
    $ HSO_{4}^{-} $
Answer
Correct option: B.
$ SO_{3} $
B
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MCQ 211 Mark
Which of the following gas is mono-atomic?
  • A
    Chlorine
  • ✓
    Helium
  • C
    Nitrogen
  • D
    Oxygen
Answer
Correct option: B.
Helium
B
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MCQ 241 Mark
Other than oxygen in group 16 of the periodic table, the element found is:
  • ✓
    Sulphur
  • B
    Sodium
  • C
    Iron
  • D
    Nitrogen
Answer
Correct option: A.
Sulphur
A
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MCQ 261 Mark
Which metal nitrate gives colourless gas on thermal decomposition?
  • ✓
    $ NaNO_{3} $
  • B
    $ Cu(NO_{3})_{2} $
  • C
    $ Ba(NO_{3})_{2} $
  • D
    $ Hg(NO_{3})_{2} $
Answer
Correct option: A.
$ NaNO_{3} $
A
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MCQ 271 Mark
Which of the following gives yellow or brown precipitate with alkaline Nessler's reagent?
  • A
    $CO _2$
  • ✓
    $NH _3$
  • C
    NaCl
  • D
    KI
Answer
Correct option: B.
$NH _3$
B
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MCQ 281 Mark
Which gas is absorbed strongly by charcoal?
  • A
    CO
  • ✓
    $ NH_{3} $
  • C
    $ NCl_{3} $
  • D
    $ H_{2} $
Answer
Correct option: B.
$ NH_{3} $
B
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MCQ 301 Mark
The product obtained when silica reacts with hydrogen fluoride is:
  • A
    $ SiF_{4} $
  • ✓
    $ H_{2}SiF_{6} $
  • C
    $ H_{2}SiF_{4} $
  • D
    $ H_{2}SiF_{3} $
Answer
Correct option: B.
$ H_{2}SiF_{6} $
B
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MCQ 311 Mark
The molecule which has zero dipole moment is:
  • A
    $ NF_{3} $
  • ✓
    $ BF_{3} $
  • C
    $ ClO_{2} $
  • D
    $ CH_{2}Cl_{2} $
Answer
Correct option: B.
$ BF_{3} $
B
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MCQ 321 Mark
Number of $ \sigma $ and $ \pi $ bonds in $ C_{2} $ molecule is/are:
  • A
    1$ \sigma $ and 1$ \pi $
  • B
    1$ \sigma $ and 2$ \pi $
  • ✓
    2$ \pi $ only
  • D
    1$ \sigma $ and 3$ \pi $
Answer
Correct option: C.
2$ \pi $ only
C
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MCQ 331 Mark
Which of the following is the strongest base?
  • A
    $ NF_{3} $
  • B
    $CH _3- NH _2$
  • ✓
    $\left( CH _3\right)_2- NH$
  • D
    $\left( CH _{3)_3}- N \right.$
Answer
Correct option: C.
$\left( CH _3\right)_2- NH$
C
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MCQ 341 Mark
Strongest oxidising agent is:
  • ✓
    $ F_{2} $
  • B
    $ Cl_{2} $
  • C
    $ I_{2} $
  • D
    $ Br_{2} $
Answer
Correct option: A.
$ F_{2} $
A
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MCQ 371 Mark
Hybridisation of carbon in diamonds is:
  • ✓
    $ sp^{3} $
  • B
    $ sp^{2} $
  • C
    sp
  • D
    $ dsp^{2} $
Answer
Correct option: A.
$ sp^{3} $
A
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MCQ 381 Mark
Maximum percentage of carbon in following allotropes is:
  • A
    In wood charcoal
  • B
    In coconut charcoal
  • ✓
    In graphite
  • D
    None of these
Answer
Correct option: C.
In graphite
C
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MCQ 391 Mark
Good conductor of heat and electricity is:
  • A
    Anthracite coke
  • B
    Diamond
  • ✓
    Graphite
  • D
    Charcoal
Answer
Correct option: C.
Graphite
C
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MCQ 411 Mark
Chemical name of borax is:
  • ✓
    Sodium Tetraborate
  • B
    Sodium Metaborate
  • C
    Sodium Orthoborate
  • D
    None of these
Answer
Correct option: A.
Sodium Tetraborate
A
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MCQ 431 Mark
Electronic configuration of alkali metals is:
  • ✓
    $ ns^{2} $
  • B
    $ ns^{1} $
  • C
    $ np^{6} $
  • D
    $ ns^{0} $
Answer
Correct option: A.
$ ns^{2} $
A
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MCQ 441 Mark
Washing soda is:
  • ✓
    $ Na_{2}CO_{3} \cdot 10H_{2}O $
  • B
    $ Na_{2}CO_{3} \cdot 5H_{2}O $
  • C
    $ Na_{2}CO_{3} $
  • D
    NaOH
Answer
Correct option: A.
$ Na_{2}CO_{3} \cdot 10H_{2}O $
A
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MCQ 451 Mark
What happen when water react with quick lime?
  • ✓
    Exothermic
  • B
    Endothermic
  • C
    Explosive
  • D
    None of these
Answer
Correct option: A.
Exothermic
A
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MCQ 471 Mark
The green vitriol is:
  • ✓
    $ FeSO_{4} \cdot 7H_{2}O $
  • B
    $ CuSO_{4} \cdot 5H_{2}O $
  • C
    $ CaSO_{4} \cdot 2H_{2}O $
  • D
    None of these
Answer
Correct option: A.
$ FeSO_{4} \cdot 7H_{2}O $
A
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MCQ 501 Mark
The shape of $ XeF_{4} $:
  • A
    Tetrahedral
  • ✓
    Square Planar
  • C
    Pyramidal
  • D
    Linear
Answer
Correct option: B.
Square Planar
B
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MCQ 511 Mark
Sodium is a member of which group in Periodic table?
  • ✓
    Group I
  • B
    Group II
  • C
    Group IV
  • D
    None of these
Answer
Correct option: A.
Group I
A
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MCQ 521 Mark
In which of the following weak base is:
  • A
    $ NCl_{3} $
  • B
    $ NBr_{3} $
  • ✓
    $ NI_{3} $
  • D
    $ NF_{3} $
Answer
Correct option: C.
$ NI_{3} $
C
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MCQ 531 Mark
Which of the following does not make hydrogen bond?
  • A
    $ NH_{3} $
  • B
    $ H_{2}O $
  • C
    HCl
  • ✓
    HF
Answer
Correct option: D.
HF
D
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MCQ 541 Mark
Strong Lewis acid in the following is:
  • A
    $ BF_{3} $
  • B
    $ BCl_{3} $
  • C
    $ BBr_{3} $
  • ✓
    $ BI_{3} $
Answer
Correct option: D.
$ BI_{3} $
D
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MCQ 551 Mark
The compound which is molecular in gas phase but ionic in solid phase is:
  • ✓
    $ PCl_{5} $
  • B
    $ CCl_{4} $
  • C
    $ PCl_{3} $
  • D
    $ POCl_{3} $
Answer
Correct option: A.
$ PCl_{5} $
A
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MCQ 561 Mark
$ H_{3}BO_{3} $ is:
  • ✓
    Monobasic and weak Lewis acid
  • B
    Monobasic and weak Bronsted acid
  • C
    Monobasic and strong Lewis acid
  • D
    Tribasic and weak Bronsted acid
Answer
Correct option: A.
Monobasic and weak Lewis acid
A
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MCQ 571 Mark
Which forms coloured salt?
  • A
    $ Cu^{+} $
  • B
    $ Zn^{2+} $
  • C
    $ Ag^{+} $
  • ✓
    $ Fe^{3+} $
Answer
Correct option: D.
$ Fe^{3+} $
D
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MCQ 591 Mark
The hybridisation of Fe in $ K_{4}[Fe(CN)_{6}] $ is:
  • A
    $ dsp^{2} $
  • B
    $ sp^{3} $
  • C
    $ d^{2}sp^{3} $
  • ✓
    $ sp^{3}d^{2} $
Answer
Correct option: D.
$ sp^{3}d^{2} $
D
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MCQ 621 Mark
Tribasic acid is:
  • ✓
    $ H_{3}PO_{4} $
  • B
    $ H_{3}PO_{3} $
  • C
    $ H_{3}PO_{2} $
  • D
    $ HPO_{3} $
Answer
Correct option: A.
$ H_{3}PO_{4} $
A
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MCQ 631 Mark
The true statement for the acid of phosphorus, $ H_{2}PO_{2} $, $ H_{3}PO_{3} $ and $ H_{3}PO_{4} $ is:
  • A
    The order of their acidity is $ H_{3}PO_{4} > H_{3}PO_{3} > H_{3}PO_{2} $
  • B
    All are reducing in nature
  • C
    All are tribasic acids
  • ✓
    The geometry of phosphorus is tetrahedral in all of these
Answer
Correct option: D.
The geometry of phosphorus is tetrahedral in all of these
D
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MCQ 641 Mark
$ F_{2} $ is formed by reacting of $ K_{2}MnF_{6} $ with:
  • A
    $ SbF_{5} $
  • B
    $ MnF_{3} $
  • ✓
    $ KSbF_{6} $
  • D
    $ MnF_{5} $
Answer
Correct option: C.
$ KSbF_{6} $
C
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MCQ 651 Mark
Which of the following hydride is most stable?
  • A
    $ AsH_{3} $
  • B
    $ SbH_{3} $
  • C
    $ PH_{3} $
  • ✓
    $ NH_{3} $
Answer
Correct option: D.
$ NH_{3} $
D
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MCQ 661 Mark
$ PCl_{5} $ is found but $ NCl_{5} $ is not because:
  • ✓
    Absence of d-orbit in nitrogen
  • B
    NCl5 is unstable
  • C
    N2 is inert
  • D
    None of these
Answer
Correct option: A.
Absence of d-orbit in nitrogen
A
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MCQ 671 Mark
Graphite is a good conductor because it has:
  • A
    Bonding electrons
  • ✓
    Moving electrons
  • C
    Strong C-C bond
  • D
    Strong C=C bond
Answer
Correct option: B.
Moving electrons
B
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MCQ 681 Mark
Compounds of Boron shows Lewis acid behaviour due to their:
  • A
    Acidic nature
  • B
    Covalent nature
  • C
    Ionisation nature
  • ✓
    Electron deficient nature
Answer
Correct option: D.
Electron deficient nature
D
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