Periodic Table · JEE Main previous year questions

The incorrect decreasing order of atomic radii is

1. A.$\mathrm{Si}>\mathrm{P}>\mathrm{Cl}>\mathrm{F}$
2. B.$\mathrm{Mg}>\mathrm{Al}>\mathrm{C}>\mathrm{O}$
3. C.$\mathrm{Al}>\mathrm{B}>\mathrm{N}>\mathrm{F}$
4. D.$\mathrm{Be}>\mathrm{Mg}>\mathrm{Al}>\mathrm{Si}$

The successive 5 ionisation energies of an element are $800,2427,3658,25024$ and $32824\text{ kJ/mol}$, respectively. By using the above values predict the group in which the above element is present :

1. A.Group 4
2. B.Group 2
3. C.Group 13
4. D.Group 14

Given below are two statements : Statement (I) : The first ionization energy of Pb is greater than that of Sn . Statement (II) : The first ionization energy of Ge is greater than that of Si . In the light of the above statements, choose the correct answer from the options given below :

1. A.Statement I is false but Statement II is true
2. B.Both Statement I and Statement II are false
3. C.Both Statement I and Statement II are true
4. D.Statement I is true but Statement II is false

Given below are the atomic numbers of some group 14 elements. The atomic number of the element with lowest melting point is :

1. A.14
2. B.50
3. C.6
4. D.82

Given below are two statements about X-ray spectra of elements : Statement (I) : A plot of $\sqrt{\nu }$ ($\nu =$ frequency of X-rays emitted) vs atomic mass is a straight line. Statement (II) : A plot of $\nu$ ($\nu =$ frequency of $X$-rays emitted) vs atomic number is a straight line. In the light of the above statements, choose the correct answer from the options given below :

1. A.Statement I is false but Statement II is true
2. B.Both Statement I and Statement II are true
3. C.Statement I is true but Statement II is false
4. D.Both Statement I and Statement II are false

Match List-I with List-II. | | List - I | | List - II | |---|---|---|---| | (A) | ${\mathrm{Al}}^{3+}<{\mathrm{Mg}}^{2+}<{\mathrm{Na}}^{+}<{\mathrm{F}}^{-}$ | (I) | Ionisation Enthalpy | | (B) | $\mathrm{B}<\mathrm{C}<\mathrm{O}<\mathrm{N}$ | (II) | Metallic character | | (C) | $\mathrm{B}<\mathrm{Al}<\mathrm{Mg}<\mathrm{K}$ | (III) | Electronegativity | | (D) | $\mathrm{Si}<\mathrm{P}<\mathrm{S}<\mathrm{Cl}$ | (IV) | Ionic radii | Choose the correct answer from the options given below :

1. A.(A)-(IV), (B)-(I), (C)- (II), (D)-(III)
2. B.(A)-(III), (B)-(IV), (C)- (II), (D)-(I)
3. C.(A)-(II), (B)-(III), (C)- (IV), (D)-(I)
4. D.(A)-(IV), (B)-(I), (C)- (III), (D)-(II)

Which of the following electronegativity order is incorrect?

1. A.$\mathrm{S}<\mathrm{Cl}<\mathrm{O}<\mathrm{F}$
2. B.$\mathrm{Al}<\mathrm{Si}<\mathrm{C}<\mathrm{N}$
3. C.$\mathrm{Al}<\mathrm{Mg}<\mathrm{B}<\mathrm{N}$
4. D.$\mathrm{Mg}<\mathrm{Be}<\mathrm{B}<\mathrm{N}$

Match List I with List II $$\begin{array}{llll}& \text{LIST I}& & \text{LIST II}\\ \text{A.}& \text{Melting Point }[\mathrm{K}]& \text{I.}& \mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}>\mathrm{B}\\ \text{B.}& \text{Ionic Radius }[{\mathrm{M}}^{+3}/pm]& \text{II.}& \mathrm{B}>\mathrm{Tl}>\mathrm{Al}\approx \mathrm{Ga}>\mathrm{In}\\ \text{C.}& {\Delta }_{\mathrm{i}}{\mathrm{H}}_1[\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}]& \text{III.}& \mathrm{Tl}>\mathrm{In}>\mathrm{Al}>\mathrm{Ga}>\mathrm{B}\\ \text{D.}& \text{Atomic Radius }[\mathrm{pm}]& \text{IV.}& \mathrm{B}>\mathrm{Al}>\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}\end{array}$$ Choose the correct answer from the options given below:

1. A.A-IV, B-I, C-II, D-III
2. B.A-I, B-II, C-III, D-IV
3. C.A-III, B-IV, C-I, D-II
4. D.A-II, B-III, C-IV, D-I

A transition metal 'M' among Sc, Ti, V, Cr, Mn and Fe has the highest second ionisation enthalpy. The spin-only magnetic moment value of ${\mathrm{M}}^{+}$ ion is ____ BM (Nearest integer) (Given atomic number $\mathrm{Sc}:21$, $\mathrm{Ti}:22$, $\mathrm{V}:23$, $\mathrm{Cr}:24$, $\mathrm{Mn}:25$, $\mathrm{Fe}:26$)

Match List I with List II LIST I (Elements) A. $\mathrm{Cl},\mathrm{S}$ B. $\mathrm{Ge},\mathrm{As}$ C. $\mathrm{Fr},\mathrm{Ra}$ D. $\mathrm{F},\mathrm{O}$ LIST II (Properties in their respective groups) I. Elements with highest electronegativity II. Elements with largest atomic size III. Elements which show properties of both metals and non-metal IV. Elements with highest negative electron gain enthalpy Choose the correct answer from the options given below:

1. A.A-III, B-II, C-I, D-IV
2. B.A-II, B-I, C-IV, D-III
3. C.A-II, B-III, C-IV, D-I
4. D.A-IV, B-III, C-II, D-I

Identify the correct statements about p-block elements and their compounds. (A) Non metals have higher electronegativity than metals. (B) Non metals have lower ionisation enthalpy than metals. (C) Compounds formed between highly reactive nonmetals and highly reactive metals are generally ionic. (D) The non-metal oxides are generally basic in nature. (E) The metal oxides are generally acidic or neutral in nature. Choose the correct answer from the options given below :

1. A.(B) and (D) only
2. B.(B) and (E) only
3. C.(D) and (E) only
4. D.(A) and (C) only

The correct statements from the following are : (A) The decreasing order of atomic radii of group 13 elements is $\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}>\mathrm{B}$. (B) Down the group 13 electronegativity decreases from top to bottom. (C) $\mathrm{Al}$ dissolves in dil. $\mathrm{HCl}$ and liberates ${\mathrm{H}}_2$ but conc. $\mathrm{HN}{\mathrm{O}}_3$ renders $\mathrm{Al}$ passive by forming a protective oxide layer on the surface. (D) All elements of group 13 exhibits highly stable +1 oxidation state. (E) Hybridisation of $\mathrm{Al}$ in $[\mathrm{Al}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$ ion is $\mathrm{s}{\mathrm{p}}^3{\mathrm{d}}^2$. Choose the correct answer from the options given below :

1. A.(A), (B), (C) and (E) only
2. B.(C) and (E) only
3. C.(A), (C) and (E) only
4. D.(A) and (C) only

Given below are two statements : Statement I : The metallic radius of $\mathrm{Na}$ is $1.86{\mathrm{A}}^{\circ }$ and the ionic radius of $\mathrm{N}{\mathrm{a}}^{+}$ is lesser than $1.86{\mathrm{A}}^{\circ }$ Statement II : Ions are always smaller in size than the corresponding elements. In the light of the above statements, choose the correct answer from the options given below :

1. A.Both Statement I and Statement II are true
2. B.Statement I is incorrect but Statement II is true
3. C.Both Statement I and Statement II are false
4. D.Statement I is correct but Statement II is false

Consider the following reaction $$\mathrm{Mn}{\mathrm{O}}_2+\mathrm{KOH}+{\mathrm{O}}_2\to \mathrm{A}+{\mathrm{H}}_2\mathrm{O}$$ Product 'A' in neutral or acidic medium disproportionate to give products 'B' and 'C' along with water. The sum of spin-only magnetic moment values of B and C is ____ BM. (nearest integer) (Given atomic number of $\mathrm{Mn}$ is 25)

Given below are two statements : Statement I : The correct order of first ionization enthalpy values of $\text{Li},\text{Na},\text{F}$ and $\text{Cl}$ is $\text{Na}<\text{Li}<\text{Cl}<\text{F}$. Statement II : The correct order of negative electron gain enthalpy values of $\text{Li},\text{Na},\text{F}$ and $\text{Cl}$ is $\text{Na}<\text{Li}<\text{F}<\text{Cl}$ In the light of the above statements, choose the correct answer from the options given below :

1. A.Statement I is true but Statement II is false
2. B.Both Statement I and Statement II are false
3. C.Statement I is false but Statement II is true
4. D.Both Statement I and Statement II are true

Given below are two statements : Statement (I) : Both metals and non-metals 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 options given below :

1. A.Both Statement I and Statement II are false
2. B.Both Statement I and Statement II are true
3. C.Statement I is false but Statement II is true
4. D.Statement I is true but Statement II is false

Consider the oxides of group 14 elements $\mathrm{Si}{\mathrm{O}}_2,\mathrm{Ge}{\mathrm{O}}_2,\mathrm{Sn}{\mathrm{O}}_2,\mathrm{Pb}{\mathrm{O}}_2,\mathrm{CO}$ and $\mathrm{GeO}$. The amphoteric oxides are

1. A.$\mathrm{Sn}{\mathrm{O}}_2,\mathrm{CO}$
2. B.$\mathrm{Si}{\mathrm{O}}_2,\mathrm{Ge}{\mathrm{O}}_2$
3. C.$\mathrm{Sn}{\mathrm{O}}_2,\mathrm{Pb}{\mathrm{O}}_2$
4. D.$\mathrm{GeO},\mathrm{Ge}{\mathrm{O}}_2$

The ionization energy of sodium in $\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$, if electromagnetic radiation of wavelength $242\mathrm{nm}$ is just sufficient to ionize sodium atom is ____.

Consider the following elements. $$\begin{array}{ll}\text{Group}\downarrow & {\mathrm{A}}^{\prime }{\mathrm{B}}^{\prime }\to \text{Period}\\ & {\mathrm{C}}^{\prime }{\mathrm{D}}^{\prime }\end{array}$$ Which of the following is/are true about ${\mathrm{A}}^{\prime },{\mathrm{B}}^{\prime },{\mathrm{C}}^{\prime }$ and ${\mathrm{D}}^{\prime }$ ? A. Order of atomic radii: ${\mathrm{B}}^{\prime }<{\mathrm{A}}^{\prime }<{\mathrm{D}}^{\prime }<{\mathrm{C}}^{\prime }$ B. Order of metallic character: ${\mathrm{B}}^{\prime }<{\mathrm{A}}^{\prime }<{\mathrm{D}}^{\prime }<{\mathrm{C}}^{\prime }$ C. Size of the element: ${\mathrm{D}}^{\prime }<{\mathrm{C}}^{\prime }<{\mathrm{B}}^{\prime }<{\mathrm{A}}^{\prime }$ D. Order of ionic radii: ${\mathrm{B}}^{\prime +}<{\mathrm{A}}^{\prime +}<{\mathrm{D}}^{\prime +}<{\mathrm{C}}^{\prime +}$ Choose the correct answer from the options given below :

1. A.A only
2. B.B, C and D only
3. C.A and B only
4. D.A, B and D only

If IUPAC name of an element is "Unununnium" then the element belongs to $n^{\text{th}}$ group of Periodic table. The value of n is _________.

Given below are two statements : Statement I : The electronegativity of group 14 elements from $\mathrm{Si}$ to $\mathrm{Pb}$, gradually decreases. Statement II : Group 14 contains non-metallic, metallic, as well as metalloid elements. In the light of the above statements, choose the most appropriate from the options given below :

1. A.Statement I is false but Statement II is true
2. B.Both Statement I and Statement II are true
3. C.Both Statement I and Statement II are false
4. D.Statement I is true but Statement II is false

Given below are two statements : Statement (I) : The $4f$ and $5f$ - series of elements are placed separately in the Periodic table to preserve the principle of classification. Statement (II) : S-block elements can be found in pure form in nature. In the light of the above statements, choose the most appropriate answer from the options given below :

1. A.Statement I is false but Statement II is true
2. B.Both Statement I and Statement II are true
3. C.Statement I is true but Statement II is false
4. D.Both Statement I and Statement II are false

Which of the following statements are not correct? A. The electron gain enthalpy of $\mathrm{F}$ is more negative than that of $\mathrm{Cl}$. B. Ionization enthalpy decreases in a group of periodic table. C. The electronegativity of an atom depends upon the atoms bonded to it. D. ${\mathrm{Al}}_2{\mathrm{O}}_3$ and $\mathrm{NO}$ are examples of amphoteric oxides. Choose the most appropriate answer from the options given below :

1. A.A, B, C and D
2. B.A, C and D Only
3. C.A, B and D Only
4. D.B and D Only

The pair of lanthanides in which both elements have high third - ionization energy is :

1. A.Dy, Gd
2. B.Lu, Yb
3. C.Eu, Yb
4. D.Eu, Gd

The correct order of metallic character is :

1. A.K > Be > Ca
2. B.Ca > K > Be
3. C.K > Ca > Be
4. D.Be > Ca > K