p-block elements mcq, B.Sc. First year Undergraduate degree course Semester first Inorganic chemistry paper I (Part-I)

Resonance October 26, 2021

 

B.Sc. First year Undergraduate degree course Semester first Inorganic chemistry paper I 

Chapter - p-Block elements mcq

1.   Among the following which group is not present in P-block.
a)   Group 12
b)   Group 13
c)   Group 15
d)   Group 16

2.   The general electronic configuration of group 13 is…
a)   Ns2nP2
b)   nS2nP1
c)   nS3nP2
d)   nS2nP3

3.   The atomic radius increases from Boron to Thallium due to…
a)   Dynamic effect
b)   Thermodynamic effect
c)   Screening effect
d)   None of above

4.   In group 13, among the following which has highest Ionization Potential?
a)   Aluminium
b)   Boron
c)   Thallium
d)   Indium

5.   Oxidation state of Boron is…
a)   -3
b)   +2
c)   +3
d)   None of above

6.   Electropositive character from Boron to Thallium…
a)   Decreases
b)   Increases
c)   Remains constant
d)   None of above

7.    Formation of Ionic Compounds is depends upon…
a)   Electropositive character
b)   Electronegative character
c)   Both of above
d)   None of above

8.   Boron to Thallium electropositive character…
a)   Decreases
b)   Increases
c)   Remain constant
d)   Remains unchanged

9.   Among the following Covalent Bonding is formed by…
a)   Aluminium
b)   Boron
c)   Indium
d)   Thallium

10.   Which medium is used to form esters of Orthoboric Acid?
a)   Basic medium
b)   Acidic medium
c)   Both A & B
d)   None of above

11.   Among the following which form of Aluminium is stable at high temperature?
a)   α Al2O3
b)   β Al2O3
c)   λ Al2O3
d)   None of above

12.   In the structure of B2H6 the number of B – B bonds are…
a)   1
b)   3
c)   0
d)   2

13.   The number of terminal Hydrogen atoms in the structure of B2H6 are…
a)   4
b)   5
c)   6
d)   0

14.   The number of bridged H Atoms in the structure of B2H6 are…
a)   1
b)   2
c)   3
d)   0

15.   Valence orbitals of each Boron atoms in  B2H6 are…
a)   SP Hybridized
b)   SP2 hybridized
c)   SP3 hybridized
d)   None of above

16.   In B4H10 number of B – B bonds presents…
a)   0
b)   1
c)   2
d)   4

17.   The bridged Hydrogen atoms present in B4H10 are…
a)   5
b)   10
c)   4
d)   2

18.   The number of terminal hydrogen present in B4H10 are…
a)   6
b)   8
c)   4
d)   0

19.   Which one of the following called as corundum alumina?
a)   α – Al2O3
b)   β - Al2O3
c)   δ - Al2O3
d)   None of above

20.   Among the following which is used in column chromatography?
a)   α - Al2O3
b)   β - Al2O3
c)   γ - Al2O3
d)   δ - Al2O3

21.   Why ionization potential increases from Sn to Pb?
a)   Presence of S electron
b)   Presence of D electron
c)   Presence of F electron
d)   None of above

22.   Diamond and Graphite are the forms of…
a)   Carbon
b)   Silicon
c)   Tin
d)   Lead

23.   Among the following which has highest tendency to form chains(Catenation)?
a)   Carbon
b)   Silicon
c)   Tin
d)   Lead

24.   The number of Si – Si bonds present in SiO2 are…
a)   0
b)   1
c)   2
d)   3

25.   The incorrect statement about CO2 is…
a)   It is colorless
b)   It is odorless
c)   It is slightly acidic
d)   None of above

26.   As atomic number increases, the character of group 14 elements from non metallic to metallic…
a)   Increases
b)   Decreases
c)   Remains unchanged
d)   None of above

27.   In group 15 as we move from N to Bi atomic radius…
a)   Decreases
b)   Increases
c)   Remains same
d)   None of above

28.   Among the following which element is present in the gaseous form?
a)   Nitrogen
b)   Phosphorus
c)   Arsenic
d)   Bismuth

29.   Among the following which element has highest Ionization energy?
a)   Nitrogen
b)   Phosphorus
c)   Arsenic
d)   Antimony

30.   Among the following which one has lowest electro negativity?
a)   Nitrogen
b)   Phosphorus
c)   Arsenic
d)   Bismuth

31.   Why Nitrogen does not form compounds in +5 oxidation state?
a)   Because it has no S orbital in outer shell
b)   It does not have d orbital in outer shell
c)   Both of above
d)   None of above

32.   Among the following which has ability to form dative bond with Lewis Acid?
a)   Phosphorus
b)   Arsenic
c)   Antimony
d)   Bismuth

33.   The common negative Oxidation state of group 15 elements is…
a)   -1
b)   -2
c)   -3
d)   -4

34.   In which Oxidation state all elements have tendency to act as electron pair donor?
a)   +2
b)   +3
c)   -3
d)   +5

35.   Among the following which one does not act as electron acceptor?
a)   Nitrogen
b)   Arsenic
c)   Antimony
d)   Bismuth

36.   Among the following which has cubic crystalline structure?
a)   α – Nitrogen
b)   β – Nitrogen
c)   γ – Nitrogen
d)   δ – Nitrogen

37.   Among the following which one element does not show allotropy?
a)   Phosphorus
b)   Arsenic
c)   Antimony
d)   Bismuth

38.   The trihydrides of group 15 elements are prepared from…
a)   Primary Metals
b)   Binary Metals
c)   Tertiary Metals
d)   None of above

39.   The Haber Process is used to prepare…
a)   PH3
b)   AsH3
c)   NH3
d)   BiH3

40.   The structures of trihydrides of group 15 are…
a)   Linear
b)   Bent
c)   Pyramidal
d)   Hexagonal

41.   All trihydrides also known as…
a)   Lewis Acid
b)   Lewis Base
c)   Bronstead Base
d)   None of above

42.   Among the trihydrides of group 15 which is most basic?
a)   NH3
b)   ArH3
c)   SbH3
d)   BiH3

43.   Among the following which one is most unstable?
a)   NH3
b)   PH3
c)   ArH3
d)   BiH3

44.   Among the following which one has less reducing character?
a)   NH3
b)   ArH3
c)   SbH3
d)   BiH3

45.   How many bridged O atoms in the P4O6 structure?
a)   0
b)   2
c)   4
d)   6

46.   P4O6 structure is…
a)   Pyramidal
b)   Tetrahedral
c)   Hexagonal
d)   Other than above

47.   The number of Ï€ bonds present in the P4O6 structure are…
a)   0
b)   2
c)   4
d)   6

48.   The trioxides of Bismuth are…
a)   Acidic in nature
b)   Basic in nature
c)   Amphoteric in nature
d)   None of above

49.   How many bridged O atoms in the P4O10 structure?
a)   0
b)   2
c)   6
d)   8

50.   Structure of P4O10 is…
a)   Tetrahedral
b)   Pentagonal
c)   Hexagonal
d)   Pyramidal

51.   In which state N2O3 exists in pure form?
a)   Liquid state
b)   Solid state
c)   Powder form
d)   None of above

52.   The most abundant element in group 16 is…
a)   Oxygen
b)   Tellurium
c)   Selenium
d)   Polonium

53.   In group 16 as atomic number increases the atomic radius…
a)   Increases
b)   Decreases
c)   Remains constant
d)   None of above

54.   Among the following which has highest melting/boiling point?
a)   Oxygen
b)   Sulphar
c)   Selenium
d)   Polonium

55.   Among the following which one has highest Ionization Potential?
a)   Oxygen
b)   Sulphar
c)   Selenium 
 d)   Tellurium
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