Periodic Table & Periodicity PYQs Set 5 (PDF)

Set 5 of 11 · Questions 121-150 of 327

In the print window choose “Save as PDF”. The file prints without a web address or date line.

Mere Teacher · Previous Year Questions JEE Main Chemistry · Periodic Table & Periodicity · Set 5 (Q121-150)
Scan or visit mereteacher.com for free PYQ practice, timed CBT tests, step-by-step solutions and BroBot AI. Answers and solutions are free with a sign-up.
121. $In which of the following, the elements Al, B, Mg and K are correctly arranged in the increasing order of their metallic character?$ (1) $B < Al < Mg < K$ (2) $B < Mg < Al < K$ (3) $Al < Mg < K < B$ (4) $B < Mg < K < Al$ 122. $Among the statements (I-IV), the correct ones are (I)Be has smaller atomic radius compared to Mg. (II)Be has higher ionization enthalpy than Al. (III)Charge/radius ratio of Be is greater than that of Al. (IV)Both Be and Al form mainly covalent compounds.$ (1) $(I), (III) and (IV)$ (2) $(I), (II) and (IV)$ (3) $(I), (II) and (III)$ (4) $(II), (III) and (IV)$ 123. $The size of the iso-electronic species Cl^{-}, Ar and Ca^{2 +} is affected by:$ (1) $azimuthal quantum number of valence shell$ (2) $electron-electron interaction in the outer orbitals$ (3) $principal quantum number of valence shell$ (4) $nuclear charge$ 124. $Which one of the following ions has the highest value of ionic radius ?$ (1) $L i^{+}$ (2) $B^{3 +}$ (3) $O^{2-}$ (4) $F^{-}$ 125. $The elements with atomic numbers 101 and 104 belong to, respectively:$ (1) $Group 6 and Actinoids$ (2) $Actinoids and Group 4$ (3) $Group 11 and Group 4$ (4) $Actinoids and Group 6$ 126. $The correct order of electronegativity for given elements is$ (1) $P > Br > C > At$ (2) $Br > P > At > C$ (3) $Br > C > At > P$ (4) $C > P > At > Br$ 127. $The correct order of covalent radii of Si, Ge, Sn is:$ (1) $Ge < Si < Sn$ (2) $Sn < Si < Ge$ (3) $Si < Ge < Sn$ (4) $Sn < Ge < Si$ 128. $The correct order of the first ionization enthalpies of the following elements is$ (1) $Li < B < Be < N$ (2) $Li < Be < B < N$ (3) $N < Be < B < Li$ (4) $N < B < Be < Li$ 129. $The electronegativities of C, N, Si and P are in the order of$ (1) $Si < P < C < N$ (2) $Si < P < N < C$ (3) $P < Si < N < C$ (4) $P < Si < C < N$ 130. $Assertion (A) : The first ionisation energy of Be is greater than that of B. Reason (R) : 2 p orbital has lower energy than 2 s orbital.$ (1) $Both A and R are true and R is a correct explanation for A .$ (2) $Both A and R are true but R is not a correct explanation for A .$ (3) $A is true but R is false.$ (4) $A is false but R is true.$ 131. $In which of the following, elements are arranged in the correct order of their electron gain enthalpies.$ (1) $F > S > O > N$ (2) $F > O > S > N$ (3) $F > O > N > S$ (4) $F > N > O > S$ 132. $In case of isoelectronic species the size of F^{-}, Ne and Na^{+} is affected by:$ (1) $Principal quantum number (n)$ (2) $None of the factors because their size is the same$ (3) $Electron-electron interaction in the outer orbitals$ (4) $Nuclear charge (z)$ 133. $The correct order of electronegativities of N, O, F and P is$ (1) $F > N > P > O$ (2) $F > O > P > N$ (3) $F > O > N > P$ (4) $N > O > F > P$ 134. $The correct order of decreasing acidic nature of oxides$ (1) $Li_{2} O > BeO > CO_{2} > B_{2} O_{3} > N_{2} O_{3}$ (2) $CO_{2} > N_{2} O_{3} > B_{2} O_{3} > Li_{2} O > BeO$ (3) $CO_{2} > BeO > Li_{2} O > B_{2} O_{3} > N_{2} O_{3}$ (4) $N_{2} O_{3} > CO_{2} > B_{2} O_{3} > BeO > Li_{2} O$ 135. $The element expected to form largest ion to achieve the nearest noble gas configuration is:$ (1) $Na$ (2) $O$ (3) $F$ (4) $N$ 136. $Which of the following oxides is most acidic in nature?$ (1) $M g O$ (2) $B e O$ (3) $B a O$ (4) $C a O$ 137. $The order of stability of metal oxides is$ (1) $Cr_{2} O_{3} < MgO < Al_{2} O_{3} < Fe_{2} O_{3}$ (2) $Fe_{2} O_{3} < Cr_{2} O_{3} < Al_{2} O_{3} < MgO$ (3) $Fe_{2} O_{3} < Al_{2} O_{3} < Cr_{2} O_{3} < MgO$ (4) $Al_{2} O_{3} < MgO < Fe_{2} O_{3} < Cr_{2} O_{3}$ 138. $Which of the following atoms has the highest first ionization energy?$ (1) $Na$ (2) $K$ (3) $Sc$ (4) $Rb$ 139. $The correct order of first ionisation enthalpy of given elements is$ (1) $Li < B < Be < C$ (2) $C < B < Be < Li$ (3) $Be < Li < B < C$ (4) $Li < Be < B < C$ 140. $The correct order of increasing ionic radii is$ (1) $M g^{2 +} < N a^{+} < F^{-} < O^{2 -} < N^{3 -}$ (2) $N^{3 -} < O^{2 -} < F^{-} < N a^{+} < M g^{2 +}$ (3) $F^{-} < N a^{+} < O^{2 -} < M g^{2 +} < N^{3 -}$ (4) $N a^{+} < F^{-} < M g^{2 +} < O^{2 -} < N^{3 -}$ 141. $The set of amphoteric oxides among the given oxides are Ga_{2} O_{3}, As_{4} O_{10}, Sb_{4} O_{10}, B_{2} O_{3}, TI_{2} O$ (1) $Tl_{2} O, B_{2} O_{3}$ (2) $Sb_{4} O_{10}, B_{2} O_{3}, Ga_{2} O_{3}$ (3) $Ga_{2} O_{3}, Tl_{2} O, As_{4} O_{10}$ (4) $Ga_{2} O_{3}, AS_{4} O_{10}, Sb_{4} O_{10}$ 142. $The ionic radius of ions is 1.02\AA. The ionic radii (in \AA) of and , respectively, are$ (1) $1.05 and 0.99$ (2) $0.72 and 0.54$ (3) $0.85 and 0.99$ (4) $0.68 and 0.72$ 143. $The correct option with respect to the Pauling electron negativity values of the elements is:$ (1) $Te > Se$ (2) $Ga < Ge$ (3) $Si < Al$ (4) $P > S$ 144. $The change in enthalpy (Δ H) in kJ mol^{- 1} for the reaction is Mg + 2 F \to MgF_{2} Given: EA of F = 328 kJ mol^{- 1}, IE_{1} of Mg = 737 kJ mol^{- 1}, IE_{2} of Mg = 1451 kJ mol^{- 1}$ (1) $3064$ (2) $876$ (3) $1860$ (4) $1532$ 145. $Given below are two statements : Statement I: C < O < N < F is the correct order in terms of first ionization enthalpy values. Statement II: S > Se > Te > Po > O is the correct order in terms of the magnitude of electron gain enthalpy values. In the light of the above statements, choose the correct answer from the options given below:$ (1) $Statement I is true but Statement II is false$ (2) $Statement I is false but Statement II is true$ (3) $Both Statement I and Statement II are false$ (4) $Both Statement I and Statement II are true$ 146. $Which of the following electronegativity order is incorrect?$ (1) $Mg < Be < B < N$ (2) $S < Cl < O < F$ (3) $Al < Si < C < N$ (4) $Al < Mg < B < N$ 147. $Which of the following sequence is correct for decreasing order of ionic radius?$ (1) $I^{-} > Se^{2 -} > Br^{-} > O^{2 -} > F^{-}$ (2) $Se^{2 -} > I^{-} > Br^{-} > F^{-} > O^{2 -}$ (3) $I^{-} > Se^{2 -} > O^{2 -} > Br^{-} > F^{-}$ (4) $Se^{2 -} > I^{-} > Br^{-} > O^{2 -} > F^{-}$ 148. $Which of the following element has two electrons in Q shell in its ground state?$ (1) $Ba$ (2) $Ra$ (3) $La$ (4) $Pb$ 149. $The correct order of C, N, O and F in terms of second ionisation potential is$ (1) $C < N < F < O$ (2) $C < O < N < F$ (3) $C < F < N < O$ (4) $F < N < C < O$ 150. $Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : The first ionization enthalpy of 3d series elements is more than that of group 2 metals Reason (R) : In 3d series of elements successive filling of d-orbitals takes place. choose the correct answer from the options given below :$ (1) $Both (A) and (R) are true and (R) is the correct explanation of (A)$ (2) $Both (A) and (R) are true but (R) is not the correct explanation of (A)$ (3) $(A) is false but (R) is true$ (4) $(A) is true but (R) is false$