CBSE Questions for Class 11 Medical Chemistry Classification Of Elements And Periodicity In Properties Quiz 6 - MCQExams.com

Number of electrons present in $$^{26} Fe$$ is ___________.
  • 26
  • 27
  • 28
  • 29
Which one of the following statements is correct?
  • The elements like F, Cl, Br etc having high values of electron affinity act as strong oxidising agent
  • The elements having low values of ionisation energies act as strong reducing agent
  • The formation of $$Be^{-}$$(g) from $$Be$$(g) is an endothermic process
  • All of these
The pair of amphoteric hydroxides is:
  • $$Al(OH)_3, LiOH$$
  • $$Be(OH)_2, Mg(OH)_2$$
  • $$B(OH)_3, Be(OH)_2$$
  • $$Be(OH)_2, Zn(OH)_2$$
Which group of elements does not show diagonal relationship?
  • $$Li,\,Mg$$
  • $$Be,\,Al$$
  • $$B,\,Si$$
  • $$C,\,P$$
Consider the $$M(OH)_3$$ formed by all the group 13 elements. The correct sequence of acidic strength of hydroxides $$[M(OH)_3]$$ is:-
  • $$B(OH)_3 < Al(OH)_3 > Ga(OH)_3 > In(OH)_3 > Tl(OH)_3$$
  • $$B(OH)_3 > Tl(OH)_3 > Al(OH)_3 > In(OH)_3 > Ga(OH)_3$$
  • $$Al(OH)_3 > Ga(OH)_3 > B(OH)_3 > In(OH)_3 > Tl(OH)_3$$
  • $$B(OH)_3 > Al(OH)_3 > Ga(OH)_3 > In(OH)_3 > Tl(OH)_3$$
Many properties of an element and its compounds can be predicted from the position of that an element in the periodic table. What property could not be predicted this way?
  • The acidic or basic nature of its oxide
  • The formula of its oxide
  • The number of isotopes it has
  • Its metallic or non-metallic properties
Which of the following properties of the elements of group $$2^{nd}$$ (alkaline earth metals) does not increase with increasing atomic number?
  • Stability of carbonate
  • Solubility of hydroxide
  • Reactivity with water
  • First ionization energy
The given diagram represents _________.
316031.png
  • $$S$$
  • $$S^-$$
  • $$Cl$$
  • $$Cl^-$$
An element M belongs to the group 1 and period 3 of the modern periodic table. Out of the following statement, which is the true about 'M'?
  • It forms an acidic oxide having formula $$M_2 O_3$$
  • It is a non-metal
  • It is highly electro positive in nature
  • It has a valency of three
Poor shielding of nuclear charge by d or f-orbital electrons is responsible for which of the following facts?
  • Atomic radius of Nb (4-1 series) is comparable to that of Ta (5-1 series)
  • The $$1^{st}$$ ionisation energy of copper is less than that of zinc
  • The value of electron gain enthalpy is more negative for sulphur than for oxygen.
  • The $$1^{st}$$ ionisation energy for gold is greater than that of silver.
Which of the following statements are true about the modern form of the periodic table?
  • Properties of the elements are the periodic functions of their atomic number
  • There are 7 periods
  •  There are 18 numbered groups
  • All of the above
Which of the following element has maximum first ionisation potential?
  • V
  • Ti
  • Cr
  • Mn
Sodium has ___________ as compared to potassium.
  • less electronegativity
  • more ionization potential
  • larger atomic radius
  • lower melting point
An element having the highest first ionization energy in a given period is :
  • inert gas
  • transition element
  • representative element
  • inner transition element
Among Li, Be, N and F, the element having the largest atomic radius is
  • Li
  • Be
  • N
  • F
The electronic configuration of the element which is just above the element with atomic number 43 in the same periodic group is :
  • $$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^5,\, 4s^2$$
  • $$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^{10}\, 4s^2\,4p^5$$
  • $$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^6,\, 4s^1$$
  • $$1s^2,\, 2s^2\, 2p^6,\, 3s^2\, 3p^6\, 3d^{10},\, 4s^1\,4p^6$$
The 1st I.E. of N as compared to C is:
  • greater
  • smaller
  • equal
  • none of these
According to Mendleev's periodic law which properties of the elements are the periodic function of their atomic masses?
  • Physical properties
  • Chemical properties
  • Physical and chemical properties both
  • None of these
Which of the following statements is incorrect about the trends in periodic properties in the periodic table ?
  • Metallic character increases from Li to Cs
  • The acidity of oxides increases from left to right in a period
  • Noble gases have the highest electron affinity among all the elements in the periodic table
  • Ionisation energy of aluminium is lower than that of magnesium
Which of the following has the highest value of ionisation energy?
  • Be
  • He
  • Ne
  • Xe
Number of electrons in $$M$$ shell of an element with atomic number $$28$$ is _______.
  • 18
  • 16
  • 8
  • 2
The element having electronic configuration $$[Kr]4d^{10}\, 4f^{14}\, 5s^2\, 5p^6\, 5d^1\, 6s^2$$ belongs to :
  • s-block
  • p-block
  • d-block
  • f-block
Electronic configuration of $$Si$$ in ground state is _____________.
  • $$2, 8, 1$$
  • $$2, 8, 2$$
  • $$2, 8, 4$$
  • $$2, 8, 3$$
Which of the following elements has the least ionisation energy?
  • $$Li$$
  • $$Cs$$
  • $$Mg$$
  • $$Ca$$
What are the electronic configuration of $$Na^{+}$$ and $$Cl^{-}$$ ions?
  • $$Na^{+}=2, 8, 2$$ and $$Cl^{-}=2, 8, 7$$
  • $$Na^{+}=2, 8$$ and $$Cl^{-}=2, 8, 8$$
  • $$Na^{+}=2, 8, 2$$ and $$Cl^{-}=2, 8, 6$$
  • $$Na^{+}=2, 8$$ and $$Cl^{-}=2, 8, 7$$
Which element of 2nd period forms most acidic oxide?
  • Flourine
  • Nitrogen
  • Boron
  • Carbon
The electronic configuration of a dipositive metal ion $$M^{2+}$$ is $$2, 8, 14$$ and its ionic weight is $$56$$. The number of neutrons in its nucleus would be:
  • $$30$$
  • $$32$$
  • $$34$$
  • $$42$$
When Li, Na, and K are placed in decreasing order of their ionisation energy, the order is :
  • Li, K, Na
  • K, Na, Li
  • Na, Li, K
  • Li, Na, K
Who was the first to classify the elements into metals and non-metals?
  • Meyer
  • Mendeleev
  • Lavoisier
  • None of the above
Ionisation energy in the alkali metals group :
  • increases from Li to Cs
  • decreases from Li to Cs
  • remains the same
  • first increases then decreases
Which is the correct electronic configuration of $$Cr$$(Chromium)?
  • $$1s^2 2s^22p^63s^23p^64s^1 3d^5$$
  • $$1s^22s^22p^63s^23p^64s^23d^4$$
  • $$1s^22s^22p^63s^23p^64s^23d^6$$
  • $$1s^22s^22p^63s^23p^64s^13d^8$$
The element with the highest first ionisation energy among the following is:
  • Oxygen
  • Nitrogen
  • Boron
  • Carbon
Which of the following has minimum ionisation energy?
  • $$F$$
  • $$Cl$$
  • $$Br$$
  • $$I$$
Which of the following metal forms amphoteric oxide?
  • Copper
  • Silver
  • Aluminium
  • Iron
Which of the following element would lose an electron easily?
  • $$Mg$$
  • $$Na$$
  • $$K$$
  • $$Ca$$
Which one of the following elements has the highest first ionization potential?
  • $$C$$
  • $$N$$
  • $$B$$
  • $$O$$
A newly discovered element $$X$$ is placed in group $$IA$$ of the periodic table since it forms :
  • an oxide which is acidic
  • a volatile chloride having a formula $$XCl$$
  • an ionic chloride having the formula $$XCl$$
  • an insoluble $$X{SO}_{4}$$
The electronic configuration of the element with Atomic number 19 is___________.
  • 2,8,7
  • 2,9,8
  • 2,8,8,1
  • 2,10,7
Which of the following burns to form an oxide, which is gaseous at room temperature?
  • Hydrogen
  • Phosphorus
  • Calcium
  • Sulphur
What type of oxide would Eka-aluminium form?
  • $$EO_3$$
  • $$E_3O_2$$
  • $$E_2O_3$$
  • $$EO$$
The element with the atomic number $$9$$ resembles with the element having the atomic number:
  • $$8$$
  • $$17$$
  • $$36$$
  • $$27$$
Ionization potential in a period is lowest for :
  • halogens
  • inert gases
  • alkali metals
  • alkaline earth elements
Metals and non-metals are separated by a zig-zag line.
  • True
  • False
Which of the following sets of elements has strongest tendency to form anions ?
  • $$As, Se, Br$$
  • $$P, S, Cl$$
  • $$N, O, F$$
  • $$Sb, Te , I$$
Arrange the following metal in the increasing order of their reactivity towards water: Zinc, Iron, Magnesium, Sodium.
  • Iron < Magnesium < Sodium < Zinc
  • Iron < Zinc < Magnesium < Sodium
  • Magnesium < Iron < Sodium < Zinc
  • Sodium < Iron < Magnesium < Zinc
Electronic configuration of vanadium is:
  • $$[Ar] 3d^{10} 4s^1$$
  • $$[Ar] 3d^{9} 4s^2$$
  • $$[Ar] 3d^{5} 4s^1$$
  • $$[Ar] 3d^{3} 4s^2$$
The first and second ionization energies (KJ mol$$^{-1}$$) of three elements A, B, and C are given below.
ABC
IE$$_1$$4026501140
IE$$_2$$264210602070
Identify the element which is likely to be an alkali-metal.
  • A
  • B
  • C
  • Can't be predicted
A particular atom has the 4th shell as its valence shell. If the difference between the number of electrons between K and N shell and L and M shell is zero, find the electronic configuration of its stable ion.
  • 2, 8, 8, 2
  • 2, 8, 18, 8
  • 2, 8, 8
  • 2, 8
The element with the highest ionization energy is:
  • lithium
  • hydrogen
  • helium
  • neon
Element $$A$$ has electronic configuration 2,$$B$$ has configuration 2,8,$$C$$ has configuration 2,8 while $$D$$ has 2,8,Which element will show similar chemical properties?
  • $$A$$ and $$C$$
  • $$A$$ and $$D$$
  • $$B$$ and $$C$$
  • $$B$$ and $$D$$
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