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Classification of Elements and Periodicity in Properties

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JEE (Main) 2021 Q26 Errorless Latest Trend MCQ
The incorrect statement among the following is
A.
$VOSO_4$ is a reducing agent
B.
$Cr_2O_3$ is an amphoteric oxide
C.
$RuO_4$ is an oxidizing agent
D.
Red colour of ruby is due to the presence of $Co^{3+}$
JEE (Main) 2021 Q27 Errorless Latest Trend MCQ
The correct order of bond dissociation enthalpy of halogens is
A.
$Cl_{2} > F_{2} > Br_{2} > I_{2}$
B.
$I_{2} > Br_{2} > Cl_{2} > F_{2}$
C.
$Cl_{2} > Br_{2} > F_{2} > I_{2}$
D.
$F_{2} > Cl_{2} > Br_{2} > I_{2}$
JEE (Main) 2021 Q28 Errorless Latest Trend MCQ
Match Column - I(Electronic configuration of elements) with Column - II(Δᵢ in kJ mol⁻¹)
Choose the most appropriate answer from the options given below
Column-IColumn-II
(P)1s² 2s²
(Q)1s² 2s² 2p⁴
(R)1s² 2s² 2p³
(S)1s² 2s² 2p¹
(I)801
(II)899
(III)1314
(IV)1402
A.
P - II, Q - III, R - IV, S - I
B.
P - I, Q - IV, R - III, S - II
C.
P - I, Q - III, R - IV, S - II
D.
P - IV, Q - I, R - II, S - III
JEE (Main) 2021 Q29 Errorless Latest Trend MCQ
The correct order of electron gain enthalpy is
A.
$S > Se > Te > O$
B.
$Te > Se > S > O$
C.
$O > S > Se > Te$
D.
$S > O > Se > Te$
JEE (Main) 2021 Q30 Errorless Latest Trend MCQ
Identify the elements X and Y using the ionization energy values given below
Ionization energy(kJ/mol)
$1^{st}$ $2^{nd}$
X4954563
Y7311450
A.
$X = Na;Y = Mg$
B.
$X = Mg;Y = F$
C.
$X = Mg;Y = Na$
D.
$X = F;Y = Mg$
JEE (Main) 2021 Q31 Errorless Latest Trend MCQ
The characteristics of elements X, Y and Z with atomic numbers, 33, 53 and 83 respectively are
A.
$X$ and $Y$ are metalloids and $Z$ is a metal
B.
$X$ is a metalloid, $Y$ is a non-metal and $Z$ is a metal
C.
$X, Y$ and $Z$ are metals
D.
$X$ and $Z$ are non-metals and $Y$ is a metalloid
JEE (Main) 2021 Q32 Errorless Latest Trend MCQ
The absolute value of the electron gain enthalpy of halogens satisfies
A.
$I > Br > Cl > F$
B.
$Cl > Br > F > I$
C.
$Cl > F > Br > I$
D.
$F > Cl > Br > I$
JEE (Main) 2021 Q33 Errorless Latest Trend MCQ
The ionic radius of $Na^{+}$ ions is 1.02 Å. The ionic radii (in Å) of $Mg^{2+}$ and $Al^{3+}$ , respectively, are
A.
1.05 and 0.99
B.
0.72 and 0.54
C.
0.85 and 0.99
D.
0.68 and 0.72
JEE (Main) 2021 Q34 Errorless Latest Trend MCQ
The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z, the elements X,Y and Z, respectively, are
A.
Chlorine, lithium and sodium
B.
Argon, lithium and sodium
C.
Argon. chlorine and sodium
D.
Neon, sodium and chlorine
JEE (Main) 2021 Q35 Errorless Latest Trend MCQ
Which one of the following statements for D.I. Mendeleeff, is incorrect
A.
He authored the textbook – Principles of Chemistry
B.
At the time, he proposed Periodic Table of elements structure of atom was known
C.
Element with atomic number 101 is named after him
D.
He invented accurate barometer
JEE (Main) 2021 Q36 Errorless Latest Trend MCQ
The ionic radii of $K^{+}, Na^{+}, Al^{3+}$ and $Mg^{2+}$ are in the order
A.
$Na^{+} < K^{+} < Mg^{2+} < Al^{3+}$
B.
$Al^{3+} < Mg^{2+} < K^{+} < Na^{+}$
C.
$Al^{3+} < Mg^{2+} < Na^{+} < K^{+}$
D.
$K^{+} < Al^{3+} < Mg^{2+} < Na^{+}$
JEE (Main) 2021 Q37 Errorless Latest Trend MCQ
The correct order of first ionization enthalpy is
A.
Mg < S < Al < P
B.
Mg < Al < S < P
C.
Al < Mg < S < P
D.
Mg < Al < P < S
JEE (Main) 2021 Q38 Errorless Latest Trend MCQ
The correct order of ionic radii for the ions, $P^{3-}, S^{2-}, Ca^{2+}, K^+, Cl^-$ is
A.
$P^{3-} > S^2 > Cl^- > K^+ > Ca^{2+}$
B.
$P^{3-} > S^2 > Cl^- > Ca^{2+} > K^+$
C.
$Cl^- > S^2 > P^{3-} > Ca^{2+} > K^+$
D.
$K^+ > Ca^{2+} > P^{3-} > S^{2-} > Cl^-$
JEE (Main) 2021 Q39 Errorless Latest Trend MCQ
Given below are two statements: one is labeled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Barium carbonate is insoluble in water and is highly stable.
Reason (R) : The thermal stability of the carbonates increases with cationic size.
Choose the most appropriate answer from the options given below
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
JEE (Main) 2021 Q40 Errorless Latest Trend MCQ
Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) : It is due to increase in ionization enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements,
choose the most appropriate answer from the options given below :
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
JEE (Main) 2021 Q41 Errorless Latest Trend MCQ
Which one of the following correctly represents the order of stability oxides $X_{2}O$ ; (X-halogen)
A.
Br > I > Cl
B.
I > Cl > Br
C.
Br > Cl > I
D.
Cl > I > Br
NEET 2021 Q42 Errorless Latest Trend MCQ
$Zr(Z = 40)$ and $Hf(Z = 72)$ have similar atomic and ionic radii because of
A.
Diagonal relationship
B.
Lanthanoid contraction
C.
Having similar chemical properties
D.
Belonging to same group
NEET 2021 Q43 Errorless Latest Trend MCQ
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it
A.
$H_{2}O < H_{2}S < H_{2}Se < H_{2}Te$ : Increasing $pK_{a}$ values
B.
$NH_{3} < PH_{3} < AsH_{3} < SbH_{3}$ : Increasing acidic character
C.
$CO_{2} < SiO_{2} < SnO_{2} < PbO_{2}$ : Increasing oxidizing power
D.
HF < HCl < HBr < HI : Increasing acidic strength
JEE (Main) 2020 Q44 Errorless Latest Trend MCQ
The electron gain enthalpy (in kJ/mol) of fluorine, chlorine, bromine and iodine, respectively are
A.
-333, -349, -325 and -296
B.
-296, -325, -333 and -349
C.
-333, -325, -349 and -296
D.
-349, -333, -325 and -296
JEE (Main) 2020 Q45 Errorless Latest Trend MCQ
With in each pair of elements of $F$ and $Cl$ , $S$ and $Se$ , and $Li$ and $Na$ , respectively, the elements that release more energy upon an electron gain are
A.
$F$ , $Se$ and $Na$
B.
$F$ , $S$ and $Li$
C.
$Cl$ , $S$ and $Li$
D.
$Cl$ , $Se$ and $Na$
JEE (Main) 2020 Q46 Errorless Latest Trend MCQ
The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are
A.
496, 737, 577, 786
B.
786, 737, 577, 496
C.
496, 577, 737, 786
D.
496, 577, 786, 737
JEE (Main) 2020 Q47 Errorless Latest Trend MCQ
The third ionization enthalpy is minimum for
A.
Fe
B.
Ni
C.
Co
D.
Mn
JEE (Main) 2020 Q48 Errorless Latest Trend MCQ
The increasing order of the atomic radii of the following elements is
A.
C
B.
O
C.
F
D.
Cl
JEE (Main) 2020 Q49 Errorless Latest Trend MCQ
B has a smaller first ionization enthalpy than Be. Consider the following statements
(I) It is easier to remove 2p electron than 2s electron.
(II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be.
(III) 2s electron has more penetration power than 2p electron
(IV) Atomic radius of B is more than Be.
(Atomic number B = 5, Be = 4)
The correct statements are
A.
(I), (II) and (III)
B.
(II), (III) and (IV)
C.
(I), (III) and (IV)
D.
(I), (II) and (IV)
JEE (Main) 2020 Q50 Errorless Latest Trend MCQ
The first and second ionization enthalpies of a metal are 496 and $4560\mathrm{kJ mol}^{-1}$ , respectively. How many moles of HCl and $\mathsf{H}_2\mathsf{SO}_4$ , respectively, will be needed to react completely with 1 mole of the metal hydroxide
A.
1 and 0.5
B.
2 and 0.5
C.
1 and 1
D.
1 and 2