CBSE Questions for Class 11 Medical Chemistry Classification Of Elements And Periodicity In Properties Quiz 13 - MCQExams.com

An element Y has the proton number 18 .The next element of the periodic table is an element  Z.
Which statement is correct?
  • Element Z has 1 more electron in its outer shell than element Y.
  • Element Z has 1 more electron shell than element Y.
  • Element Z is in the same group of the periodic table as element Y.
  • Element Z is in the same period of the periodic table as element Y.
The IUPAC name of the element having atomic number 109 is
  • Unniloctium
  • Unnilquadium
  • Unnilennium
  • Ununseptium
The electronic configuration of an element is $$1{ s }^{ 2 }2{ s }^{ 2 }2{ p }^{ 6 }3{ s }^{ 2 }3{ p }^{ 6 }3{ d }^{ 5 }4{ s }^{ 1 }.$$ This represents its:
  • excited state
  • ground state
  • cationic form
  • none
The correct order of  second I. E. of C, N, O and F are in the order : 
  • F > O > N > C
  • C > N > O > F
  • O > N > F > C
  • O > F > N > C
Which of the following is not correct increasing order of ionisation energy
  • $$Cl^{-} < Ar < K^{+}$$
  • Au < Ag < Cu
  • Cs < Rb < K
  • K < Ca < Sc
The elements with the lowest number that has a ground state electronic configuration of $$\left( {n - 1} \right){d^6}n{s^2}$$ is located in the :
  • fifth period
  • sixth period
  • fourth period
  • third period
Group I elements of the periodic table are known as:
  • Alkali metals
  • Alkaline earth metals
  • Inert gases
  • None of these
Which of the following atoms has the highest first ionisation energy?
  • $$Na$$
  • $$K$$
  • $$Cs$$
  • $$Rb$$
Which of the following has maximum ionization potential?
  • $$Al$$
  • $$P$$
  • $$Si$$
  • $$Mg$$
General electronic configuration of outermost and penultimate shell is $$(n-1) s^2(n - 1)p^6(n - 1)d^x ns^2$$. If $$n = 4$$ and $$x = 5$$, then the number of protons in the nucleus will be: 
  • $$> 25$$
  • $$< 24$$
  • $$25$$
  • $$30$$
Which one of the following is not a monoatomic element ? 
  • Copper
  • Helium
  • Iodine
  • Barium
Select the correct order of first ionization potential : 
  • $$ N > O_2 $$
  • $$ O_2 > N $$
  • $$ O_2 = N $$
  • None of these
Which of the following is incorrect ? 
  • Among $$Cl, Ar$$ and $$K,K$$ has the smallest ionization potential
  • Among $$ CH_4 ,NH_3$$ and $$ HF, HF$$ has the highest boiling point
  • Among $$ Cl_2, Br_2$$ and $$I_2 , Br_ 2 $$ has the lowest boiling point
  • Among $$HOl$$ and $$HOBr$$ and $$HOCl, HOl$$ is the weakest
Sodium has, as compared to potassium:
  • less electronegativity
  • more ionisation potential
  • larger atomic radius
  • lower melting point
An element having electronic configuration $$1s^{2}, 2s^{2}, 2p^{6}, 3s^{2},3p^{6}, 4s^{1}$$ will form:
  • Acidic oxide
  • Basic oxide
  • Amphoteric oxide
  • Neutral oxide
The ionisation enthalpy of isotopes of an element will be: 
  • same
  • different
  • dependent on atomic masses
  • dependent on the number of neutrons present in the nucleus
The set representing the correct order of first ionisation enthalpy is :
  • K > Na > Li
  • Be > Mg > Ca
  • B > C > N
  • Ge > Si > C
In which of the following arrangements, the order is not according to the property indicated against it?
  • $$ Al^{3+} < Mg^{2+} < Na^+ < F^- $$ increasing ionic size
  • B < C < N < O increasing first ionisation enthalpy
  • I < Br < F < Cl increasing electron gain enthalpy (with negative sign)
  • Li < Na < K < Rb increasing metallic radius
Potassium forms $$K^+$$ ion but it does not form $$K^{2+}$$ because of 
  • Very low value of $$(I.E.)_1$$ and $$(I.E.)_2$$
  • Very high value of $$(I.E.)_1$$ and $$(I.E.)_2$$
  • Low value of $$(I.E.)_1$$ and low value of $$(I.E.)_2$$
  • Low value of $$(I.E.)_1$$ and high value of $$(I.E.)_2$$
In the following, the element with the highest ionisation energy is :
  • $$ [Ne] 3s^2 3p^1 $$
  • $$ [Ne] 3s^23p^3 $$
  • $$ [Ne] 3s^2 3p^2 $$
  • $$ [Ne]3s^2 3p^4 $$
For the process 
$$A_{(g)} + e^- \longrightarrow A_{(g)}; \quad \Delta H = x$$
and $$A^- _{(g)} \longrightarrow A_{(g)} + e^-; \quad \Delta H = y$$

Select correct alternate:
  • Ionization energy of $$A^-_{(g)}$$ is $$y.$$
  • Electron affinity of $$A_{(g)}$$ is $$x.$$
  • Electron affinity of $$A_{(g)}$$ is $$-y.$$
  • All are correct statements
In which of the following arrangements, the order is NOT according to the property indicated against it? 
  • $$Li < Na < K < Rb$$: increasing metallic radius
  • $$I < Br < F < Cl$$: increasing electron gain enthalpy
  • $$B < C < N < O$$: increasing first ionization enthalpy
  • $$Al^{3+} < Mg^{2+} < Na^+< F^-:$$ increasing ionic size
The element with atomic number 3 to 10 belong to the second period. Identify the most electropositive and most electronegative element in this period.
  • $$F, Li$$
  • $$Li, F$$
  • $$Li, Ne$$
  • $$Ne, Li$$
Assign the position of the element having outer electronic configuration,
(A) $$ns^2np^2\,(n =6)$$
(B) $$(n - 1)d^2ns^2\,(n=4)$$
(C) $$(n-2)f^7(n-1)d^{1}ns^2\,(n=6)$$
Which of the following statement(s) is/are correct?
  • The element A belongs to $$3^{rd}$$ periods and $$16^{th}$$ groups.
  • The element ‘A belongs to $$6^{th}$$ periods and $$14^{th}$$ groups.
  • The element 'C’ belongs to $$6^{th}$$ period and is a lanthanide element
  • All A, B, C elements are metals
Which of the following atomic species has maximum ionization energy?
  • $$O^-$$
  • $$S^-$$
  • $$Se^-$$
  • $$Te^-$$
Which of the following pairs of elements have the same number of electrons in their outermost shell?
  • Mn, Fe
  • Na, Sr
  • As, Bi
  • Se, Te
An element of the $$4th$$ period which has maximum number of unpaired electrons is :
  • $$_{20} Ca $$
  • $$_{24}Cr $$
  • $$_{30}Zn$$
  • $$_{33} As$$
The first ionization potential of $$Mg , Al , P $$ and $$S$$ follows the order:
  • $$Mg < Al < P < S $$
  • $$Al < Mg < P < S $$
  • $$Al < Mg < S < P $$
  • $$Mg < Al < S < P $$
The first ionization enthalpies of the given elements are in the order of:
  • $$C < N < Si < P$$
  • $$N < Si < C < P$$
  • $$Si < P < C < N$$
  • $$P < Si < N < C$$
If there were 10 periods in the periodic table and each orbital could have maximum 4 electrons, then how many maximum number of elements would be present in period 9?
  • 100
  • 125
  • 150
  • 90
The first ionization energies of $$Na , Mg , Al $$ and $$Si$$ are in the order :
  • $$ Na < Mg > Al < Si $$
  • $$Na > Mg > Al < Si $$
  • $$Na > Mg > Al > Si $$
  • $$Na < Mg < Al < Si $$
The highly metallic element will have the configuration of :
  • $$ 2 , 8 , 7 $$
  • $$ 2 , 8 , 8 , 5 $$
  • $$ 2 , 8 , 8 , 1 $$
  • $$ 2 , 8 , 2 $$
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 11 Medical Chemistry Quiz Questions and Answers