Periodic Table & Periodicity PYQs Set 1 (PDF)

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NEET Chemistry · Periodic Table & Periodicity · Set 1 (Q1-30)

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1.
Inert gases have positive electron gain enthalpy. Its correct order is
1. (1) $Xe < Kr < Ne < He$
2. (2) $He<Ne<Kr<Xe$
3. (3) $He<Xe<Kr<Ne$
4. (4) $He<Kr<Xe<Ne$
2.
The group having isoelectronic species is:
1. (1) $O^{-}, F^{-}, Na, M g^{+}$
2. (2) $O^{2-}, F^{-}, Na, M g^{2 +}$
3. (3) $O^{-}, F^{-}, N a^{+}, M g^{2 +}$
4. (4) $O^{2-}, F^{-}, N a^{+}, M g^{2 +}$
3.
For one of the element various successive ionization enthalpies (in $kJ mol^{- 1}$ ) are given below :
I.E.
$1^{st}$
$2^{nd}$
$3^{rd}$
$4^{th}$
$5^{th}$

577.5
1810
2750
11,580
14,820
The element is
1. (1) $P$
2. (2) $Mg$
3. (3) $Si$
4. (4) $Al$
4.
In which of the following the elements are in correct order of their chemical reactivity in terms of oxidizing property?
1. (1) $F > O > Cl > N$
2. (2) $O > F > Cl > N$
3. (3) $Cl > F > O > N$
4. (4) $F > Cl > N > O$
5.
For electron gain enthalpies of the elements denoted as $∆_{e g}$ H, the incorrect option is :
1. (1) $∆_{e g} H (Cl) < ∆_{e g} H (F)$
2. (2) $∆_{e g} H (Se) < ∆_{e g} H (S)$
3. (3) $∆_{e g} H (I) < ∆_{e g} H (At)$
4. (4) $∆_{e g} H (Te) < ∆_{e g} H (Po)$
6.
The correct statements among $I$ to $III$ regarding group $13$ element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.
1. (1) $(I) and (II) only$
2. (2) $(I), (II) and (III)$
3. (3) $(I) and (III) only$
4. (4) $(II) and (III) only$
7.
Assertion: The first ionization energy of Be is greater than that of B.
Reason: 2p orbital is lower in energy than 2s.
1. (1) $Both Assertion and Reason are true and Reason is the correct explanation of Assertion.$
2. (2) $Both Assertion and Reason are true but Reason is not correct explanation of Assertion.$
3. (3) $Assertion is true but Reason is false.$
4. (4) $Assertion is false but Reason is true.$
8.
The correct order of bond dissociation enthalpy of halogen is :
1. (1) $F_{2} > C l_{2} > B r_{2} > I_{2}$
2. (2) $C l_{2} > F_{2} > B r_{2} > I_{2}$
3. (3) $C l_{2} > B r_{2} > F_{2} > I_{2}$
4. (4) $I_{2} > B r_{2} > C l_{2} > F_{2}$
9.
Given below are two statements :
Statement (I) : Both metal and non-metal exist in p and d-block elements.
Statement (II) : Non-metals have higher ionisation enthalpy and higher electronegativity than the metals.
In the light of the above statements, choose the most appropriate answer from the option given below:
1. (1) $Both Statement I and Statement II are false$
2. (2) $Statement I is false but Statement II is true$
3. (3) $Statement I is true but Statement II is false$
4. (4) $Both Statement I and Statement II are true$
10.
The second ionisation energies of $Li, Be, B$ and $C$ are in the order_____
1. (1) $Li > C > B > Be$
2. (2) $Li > B > C > Be$
3. (3) $Be > C > B > Li$
4. (4) $B > C > Be > Li$
11.
Identify the incorrect match

Name
IUPAC Official Name
A.
Unnilunium
(i)
Mendelevium
B.
Unniltrium
(ii)
Lawrencium
C.
Unnilhexium
(iii)
Seaborgium
D.
Unununnium
(iv)
Darmstadtium
1. (1) $(B), (ii)$
2. (2) $(C), (iii)$
3. (3) $(D), (iv)$
4. (4) $(A), (i)$
12.
Consider the elements $Ne, Na, Mg$ . The element with highest first ionization enthalpy and element with lowest second ionization enthalpy respectively are
1. (1) $Na, Ne$
2. (2) $Ne, Mg$
3. (3) $Na, Na$
4. (4) $Mg, Na$
13.
The lanthanide contraction is responsible for the fact that:
1. (1) $Zr and Y have about the same radius$
2. (2) $Zr and Nb have similar oxidation state$
3. (3) $Zr and Hf have about the same radius$
4. (4) $Zr and Zn have same oxidation state.$
14.
The correct order of the first ionization enthalpy is
1. (1) $Al > Ga > Tl$
2. (2) $Ga > Al > B$
3. (3) $Tl > Ga > Al$
4. (4) $B > Al > Ga$
15.
The electron affinity value are negative for
A. $Be \to Be^{-}$
B. $N \to N^{-}$
C. $O \to O^{2 -}$
D. $Na \to Na^{-}$
$E . Al \to Al^{-}$ Choose the most appropriate answer from the options given below :
1. (1) $D and E only$
2. (2) $A, B and C only$
3. (3) $A and D only$
4. (4) $A, B, D and E only$
16.
The ionic radii (in Å) of $N^{3 -}$ , $O^{2 -}$ and $F^{-}$ are respectively :
1. (1) $1.36, 1.40 and 1.71$
2. (2) $1.36, 1.71 and 1.40$
3. (3) $1.71, 1.40 and 1.36$
4. (4) $1.71, 1.36 and 1.40$
17.
With which of the following electronic configuration an atom has the lowest ionisation enthalpy?
1. (1) $1 s^{2} 2 s^{2} 2 p^{3}$
2. (2) $1 s^{2} 2 s^{2} 2 p^{5} 3 s^{1}$
3. (3) $1 s^{2} 2 s^{2} 2 p^{6}$
4. (4) $1 s^{2} 2 s^{2} 2 p^{5}$
18.
The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is:
1. (1) $F < S < P < B$
2. (2) $P < S < B < F$
3. (3) $B < P < S < F$
4. (4) $B < S < P < F$
19.
Which one among the following statements is/are not correct?
I. Ba compounds, generally are more covalent than Be compounds.
II. The electron gain enthalpy of $He$ is positive.
III. The oxidation state of $O$ in $OF_{2}$ and $Na_{2} O$ are same.
IV. The radius of $Na^{+}$ ion is smaller than that of $F^{-}$ ion.
1. (1) $I, III, IV$
2. (2) $II$
3. (3) $II, III, IV$
4. (4) $I, III$
20.
The correct order of metallic character is
1. (1) $K > Be > Ca$
2. (2) $Be > Ca > K$
3. (3) $Ca > K > Be$
4. (4) $K > Ca > Be$
21.
The correct order of the atomic radii of $C, Cs, Al$ , and $S$ is :
1. (1) $C < S < A 1 < Cs$
2. (2) $S < C < Cs < Al$
3. (3) $S < C < Al < Cs$
4. (4) $C < S < Cs < Al$
22.
The incorrect statement among the following is:
1. (1) $the first ionization energy of Al is less than first ionization energy of Mg.$
2. (2) $the second ionization energy of Mg is greater than second ionization energy of Na.$
3. (3) $the first ionization energy of Na is less than first ionization energy of Mg$
4. (4) $the third ionization energy of Mg is greater than third ionization energy of Al.$
23.
The first ionisation energies (in $kJ mol^{- 1}$ ) of four consecutive elements of the second period are given in the options. The first ionisation energy of nitrogen is
1. (1) $1086$
2. (2) $1402$
3. (3) $1681$
4. (4) $1314$
24.
$Match the LIST-I with LIST-II (Family) (Symbol of Element)$
$LIST-I$ $LIST-II$
$A. Pnictogen (group 15)$ $I. Ts$
$B. Chalcogen$ $II.$
$Og C. Halogen III. Lv D. Noble gas IV. Mc Choose the correct answer from the options given below:$
1. (1) $A-IV, B-I, C-II, D-III$
2. (2) $A-IV, B-III, C-I, D-II$
3. (3) $A-III, B-I, C-IV, D-II$
4. (4) $A-II, B-III, C-IV, D-I$
25.
In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.
1. (1) $Rb & Br$
2. (2) $K & Se$
3. (3) $K & Br$
4. (4) $Na & Cl$
26.
Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is :
1. (1) $Mg < Ca < Cl < P$
2. (2) $Cl < P < Mg < Ca$
3. (3) $P < Cl < Ca < Mg$
4. (4) $Ca < Mg < P < Cl$
27.
Which of the following is not a periodic property?
1. (1) $Atomic size$
2. (2) $Electron affinity$
3. (3) $Radioactivity$
4. (4) $Ionisation potential$
28.
Identify the elements and using the ionisation energy values given below:
Ionization Energy (kJ/mol)
$1^{s t}$ $2^{n d}$
X 495 4563
Y 731 1450
1. (1) $X =Na; Y=Mg$
2. (2) $X=Mg; Y=F$
3. (3) $X=Mg; Y=Na$
4. (4) $X=F; Y=Mg$
29.
Which of the following statements are not correct?
(A) The electron gain enthalpy of F is more negative than that of Cl.
(B) lonization enthalpy decreases in a group of periodic table.
(C) The electronegativity of an atom depends upon the atoms bonded to it.
(D) $A 1_{2} O_{3}$ and NO are examples of amphoteric oxides.
Choose the most appropriate answer from the options given below:
1. (1) $A, B, C and D$
2. (2) $A, B and D only$
3. (3) $B and D only$
4. (4) $A, C and D only$
30.
Match the following:
$List-I (Atomic number) A. 56 B. 50 C. 27 D. 58 List - II (Group number & Period number) I. 9,4 II. 3,6 III. 14,5 IV. 2,6$
1. (1) $A-III; B-IV; C-I; D-II$
2. (2) $A-II; B-III; C-IV; D-I$
3. (3) $A-IV; B-I; C-II; D-III$
4. (4) $A-IV; B-III; C-I; D-II$