Download App

Chemistry M.C.Q [1M]

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

Questions · Page 1 of 2

M.C.Q [1M]

🎯

Test yourself on this topic

50 questions · timed · auto-graded

MCQ 11 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
View full question & answer→
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
View full question & answer→
MCQ 41 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
View full question & answer→
MCQ 51 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
View full question & answer→
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
View full question & answer→
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
View full question & answer→
MCQ 101 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
View full question & answer→
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
View full question & answer→
MCQ 121 Mark
Which of the following gas is mono-atomic?
  • A
    Chlorine
  • ✓
    Helium
  • C
    Nitrogen
  • D
    Oxygen
Answer
Correct option: B.
Helium
B
View full question & answer→
MCQ 131 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
View full question & answer→
MCQ 151 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
View full question & answer→
MCQ 161 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
View full question & answer→
MCQ 171 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
View full question & answer→
MCQ 181 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
View full question & answer→
MCQ 191 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
View full question & answer→
MCQ 201 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
View full question & answer→
MCQ 221 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
View full question & answer→
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
View full question & answer→
MCQ 271 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
View full question & answer→
MCQ 291 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
View full question & answer→
MCQ 301 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
View full question & answer→
MCQ 311 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
View full question & answer→
MCQ 321 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
View full question & answer→
MCQ 331 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
View full question & answer→
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
View full question & answer→
MCQ 351 Mark
Good conductor of heat and electricity is:
  • A
    Anthracite coke
  • B
    Diamond
  • ✓
    Graphite
  • D
    Charcoal
Answer
Correct option: C.
Graphite
C
View full question & answer→
MCQ 361 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
View full question & answer→
MCQ 371 Mark
What happen when water react with quick lime?
  • ✓
    Exothermic
  • B
    Endothermic
  • C
    Explosive
  • D
    None of these
Answer
Correct option: A.
Exothermic
A
View full question & answer→
MCQ 381 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
View full question & answer→
MCQ 411 Mark
Hybridisation of carbon in diamonds is:
  • ✓
    $ sp^{3} $
  • B
    $ sp^{2} $
  • C
    sp
  • D
    $ dsp^{2} $
Answer
Correct option: A.
$ sp^{3} $
A
View full question & answer→
MCQ 431 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
View full question & answer→
MCQ 451 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
View full question & answer→
MCQ 461 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
View full question & answer→
MCQ 471 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
View full question & answer→
MCQ 481 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
View full question & answer→
MCQ 501 Mark
The shape of $ XeF_{4} $:
  • A
    Tetrahedral
  • ✓
    Square Planar
  • C
    Pyramidal
  • D
    Linear
Answer
Correct option: B.
Square Planar
B
View full question & answer→
Generate Paper FreeAll p- Block Elements topics
M.C.Q [1M] - Chemistry STD 12 Science Questions - Vidyadip