# Solved papers for NEET Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति NEET PYQ-Classification Elements In Properties

### done NEET PYQ-Classification Elements In Properties Total Questions - 24

• question_answer1) The first ionization potential (in eV) of Be and B, respectively are:                                        [AIPMT 1998]

A)
8.29, 9.32

B)
9.32, 9.32

C)
8.29, 8.29

D)
9.32, 8.29

• question_answer2) Which of the following elements has maximum electron affinity?                                                       [AIPMT 1999]

A)
$Cl$

B)
Br

C)
I

D)
F

• question_answer3) Correct order of Ist ionisation potential (I.P.) among following elements Be, B, C, N, O is:        [AIPMT 2001]

A)
$B<Be<C<O<N$

B)
$B<Be<C<N<O$

C)
$Be<B<C<N<O$

D)
$Be<B<C<O<N$

• question_answer4) An atom has electronic configuration $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{3}}4{{s}^{2}},$ you will place it in:                                                                                                                                                 [AIPMT 2002]

A)
fifth group

B)
fifteenth group

C)
second group

D)
third group

• question_answer5) The ions ${{O}^{2-}},\,{{F}^{-}},\,N{{a}^{+}},M{{g}^{2+}}$ and $A{{l}^{3+}}$ are isoelectronic. Their ionic radii show:                                                                                                                     [AIPMT 2003]

A)
an increase from ${{O}^{2-}}$ to ${{F}^{-}}$ and then decrease from $N{{a}^{+}}$ to $A{{l}^{3+}}$

B)
a decrease from ${{O}^{2-}}$ to F- and then increase from $N{{a}^{+}}$ to $A{{l}^{3+}}$

C)
a significant increase from ${{O}^{2-}}$ to $A{{l}^{3+}}$

D)
a significant decrease from ${{O}^{2-}}$ to $A{{l}^{3+}}$

A)
inversely proportional to effective nuclear charge

B)
inversely proportional to square of effective nuclear charge

C)
directly proportional to effective nuclear charge

D)
directly proportional to square of effective nuclear charge

• question_answer7) Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?                                                                                                   [AIPMT (S) 2005]

A)
$Cl<F<S<O$

B)
$O<S<F<Cl$

C)
$S<O<Cl<F$

D)
$F<Cl<O<S$

• question_answer8) With which of the following electronic configuration an atom has the lowest ionisation enthalpy?            [AIPMT (S) 2007]

A)
$1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{5}}$

B)
$1{{s}^{2\,}}\,2{{s}^{2}}\,2{{p}^{3}}$

C)
$1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{5}}\,3{{s}^{1}}$

D)
$1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}$

• question_answer9) Identify the correct order of the size of the following:                                                 [AIPMT (S) 2007]

A)
$C{{a}^{2+}}<{{K}^{+}}<Ar<{{S}^{2-}}<C{{l}^{-}}$

B)
$C{{a}^{2+}}<{{K}^{+}}<Ar<C{{l}^{-}}<{{S}^{2-}}$

C)
$Ar<C{{a}^{2+}}<{{K}^{+}}<C{{l}^{-}}<{{S}^{2-}}$

D)
$C{{a}^{2+}}<Ar<{{K}^{+}}<C{{l}^{-}}<{{S}^{2-}}$

• question_answer10) Which one of the following arrangements does not give the correct picture of the trends indicated against it?                        [AIPMT (S) 2008]

A)
${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:$ Oxidizing power

B)
${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:$ Electron gain enthalpy

C)
${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:$Bond dissociation energy

D)
${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}$: Electronegativity

• question_answer11) Amongst the elements with following electronic configurations, which one of them may have the highest ionisation energy?     [AIPMT (S) 2009]

A)
$[Ne]\,3{{s}^{2}}3\,{{p}^{3}}$

B)
$[Ne]\,3{{s}^{2}}3\,{{p}^{2}}$

C)
$[Ar]\,3{{d}^{10}},\,4{{s}^{2}}4\,{{p}^{3}}$

D)
$[Ne]\,3{{s}^{2}}3\,{{p}^{1}}$

• question_answer12) Which of the following pairs has the same size?                                                       [AIPMT (S) 2010]

A)
$F{{e}^{2+}},N{{i}^{2+}}$

B)
$Z{{r}^{4+}},T{{i}^{4+}}$

C)
$Z{{r}^{4+}},H{{f}^{4+}}$

D)
$Z{{n}^{2+}},H{{f}^{4+}}$

• question_answer13) The correct order of the decreasing ionic radii among the following is electronic species is          [AIPMT (S) 2010]

A)
$C{{a}^{2+}}>{{K}^{+}}>{{S}^{2-}}>C{{l}^{-}}$

B)
$C{{l}^{-}}>{{S}^{2-}}>C{{a}^{2+}}>{{K}^{+}}$

C)
${{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}$

D)
${{K}^{+}}>C{{a}^{2+}}>C{{l}^{-}}>{{S}^{2-}}$

• question_answer14) Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl?                                                                                                                       [AIPMT (S) 2010]

A)
$CI<F<O<S~~$

B)
$O<S<F<Cl$

C)
$F<S<O<Cl$

D)
$S~<O<Cl<F$

• question_answer15) Among the elements $Ca,\text{ }Mg,\text{ }P$ and Cl, the order of increasing atomic radii is              [AIPMT (M) 2010]

A)
$Mg<Ca<Cl<P$

B)
$Cl<P<Mg<Ca$

C)
$P<Cl<Ca<Mg$

D)
$Ca<Mg<P<Cl$

• question_answer16) Among the following which one has the highest cation to anion size ratio?                                [AIPMT (M) 2010]

A)
Csl

B)
CsF

C)
LiF

D)
NaF

• question_answer17) What is the value of electron gain enthalpy of $N{{a}^{+}}$if $I{{F}_{1}}$ of $Na=5.1\text{ }eV$? [AIPMT (M) 2011]

A)
- 5.1 eV

B)
- 10.2 eV

C)
= 2.55 eV

D)
+ 10.2 eV

• question_answer18) Identify the wrong statement in the following.                                                                      [AIPMT (S) 2012]

A)
Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius

B)
Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

C)
Atomic radius of the elements increases as one moves down the first group of the Periodic Table

D)
Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the Periodic Table

• question_answer19) Which of the following orders of ionic radii is correctly represented?                                        [AIPMT 2014]

A)
${{H}^{-}}>,{{H}^{+}}>H$

B)
$N{{a}^{+}}>{{F}^{-}}>{{O}^{2-}}$

C)
${{F}^{-}}>{{O}^{2-}}>N{{a}^{+}}$

D)
None of these

• question_answer20) The species $Ar,{{K}^{+}}$ and $C{{a}^{2+}}$ contain the same number of electrons. In which order do their radii increase?                                                                                                                        [NEET 2015 ]

A)
$Ar+{{K}^{+}}<C{{a}^{2+}}$

B)
$C{{a}^{2+}}<Ar<{{K}^{+}}$

C)
$C{{a}^{2+}}<{{K}^{+}}<Ar$

D)
${{K}^{+}}<Ar<C{{a}^{2+}}$

• question_answer21) In which of the following options the order of arrangement does not agree with the variation of property indicated against it?      [NEET - 2016]

A)
$A{{l}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}$ (increasing ionic size)

B)
$B<C<N<O$ (increasing first ionisation enthalpy)

C)
$I<Br<Cl<F$(increasing electron gain enthalpy)

D)
$Li<Na<K<Rb$(increasing metallic radius)

• question_answer22) The element $Z=114$ has been discovered recently. It will belong to which of the following family group and electronic configuration?                                                                                                                 [NEET-2017]

A)
Nitrogen family, $[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{6}}$

B)
Halogen family, $[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{5}}$

C)
Carbon family, $[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{2}}$

D)
Oxygen family, $[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{4}}$

• question_answer23)   For the second period elements the correct increasing order of first ionization enthalpy is-          [NEET 2019]

A)
Li < B < Be < C < N < O < F < Ne

B)
Li < Be < B < C < O < N < F < Ne

C)
Li < Be < B < C < N < O < F < Ne

D)
Li < B < Be < C < O < N < F < Ne

Identify the incorrect match.                                                                                 [NEET 2020]
 Name IUPAC Official Name [a] Unnilunium (i) Mendelevium [b] Unniltrium (ii) Lawrencium [c] Unnilhexium (iii) Seaborgium [d] Unununnium (iv) Darmstadtium

A)
, (ii)

B)
, (iii)

C)
, (iv)

D)
, (i)