JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
Given below are two statements:
Statement-I: The correct order in terms of atomic/ionic radii is \(Al > Mg > Mg^{2+} > Al^{3+}\).
Statement-II: The correct order in terms of the magnitude of electron gain enthalpy is \(Cl > Br > S > O\).
In the light of the above statements, choose the correct answer from the options given below :
- A Both Statement I and Statement II are false
- B Statement I is false but Statement II is true
- C Statement I is true but Statement II is false
- D Both Statement I and Statement II are true
Answer & Solution
Correct Answer
(B) Statement I is false but Statement II is true
Step-by-step Solution
Detailed explanation
Correct order of size is \(Mg > Al > Mg ^{2+}> Al ^{3+}\) Atomic size depends mainly upon \(Z _{\text {effective }}\) and shell number. Generally on moving down the group electron affinity decreases and on moving across the period electron affinity increase. In the periodic…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- In \(KO_2\), the nature of oxygen species and the oxidation state of oxygen atom are, respectivelyJEE Mains 2018 Hard
- The number of photons emitted by a monochromatic (single frequency) infrared range finder of power \(1\, \mathrm{~mW}\) and wavelength of \(1000 \,\mathrm{~nm}\), in \(0.1\) \(second\) is \(\mathrm{x}\, \times 10^{13}\). The value of \(\mathrm{x}\) is ..... . (Nearest integer) \(\left(\mathrm{h}=6.63 \times 10^{-34}\, \mathrm{Js}, \mathrm{c}=3.00 \times 10^{8} \,\mathrm{~ms}^{-1}\right)\)JEE Mains 2021 Medium
- Given below are two statements:
Statement I: Among \( [Cu(NH_{3})_{4}]^{2+}, [Ni(en)_{3}]^{2+}, [Ni(NH_{3})_{6}]^{2+} \) and \( [Mn(H_{2}O)_{6}]^{2+}, [Mn(H_{2}O)_{6}]^{2+} \) has the maximum number of unpaired electrons.
Statement II: The number of pairs among \( \{[NiCl_{4}]^{2-}, [Ni(CO)_{4}]\}, \{[NiCl_{4}]^{2-}, [Ni(CN)_{4}]^{2-}\} \) and \( \{[Ni(CO)_{4}], [Ni(CN)_{4}]^{2-}\} \) that contain only diamagnetic species is two.
In the light of the above statements, choose the correct answer from the options given below:JEE Mains 2026 Medium - Which of the following is NOT a physical or chemical characteristics of interstitial compounds?JEE Mains 2026 Easy
- Given below are two statements : Statement \(I\) : The higher oxidation states are more stable down the group among transition elements unlike p-block elements. Statement \(II\) : Copper can not liberate hydrogen from weak acids. In the light of the above statements, choose the correct answer from the options given below :JEE Mains 2024 Medium
- \(t_{100\%}\) is the time required for the \(100\%\) completion of the reaction while \(t_{1/2}\) is the time required for \(50\%\) of the reaction to be completed. Which of the following option correctly represents the relation between \(t_{100\%}\) and \(t_{1/2}\) for zero and first order reactions respectively?JEE Mains 2026 Medium
More PYQs from JEE Mains
- Let \(\vec{a}\) and \(\vec{b}\) be two vectors. Let \(|\vec{a}|=1,|\vec{b}|=4\) and \(\vec{a} \cdot \vec{b}=2\). If \(\vec{c}=(2 \vec{a} \times \vec{b})-3 \vec{b}\), then the value of \(\overrightarrow{ b } \cdot \overrightarrow{ c }\) isJEE Mains 2023 Medium
- For certain chemical reaction \(X \rightarrow Y\), the rate of formation of product is plotted against the time as shown in the figure. The number of Correct statement/s from the following is \(.......\). \((A)\) Over all order of this reaction is one \((B)\) Order of this reaction can't be determined \((C)\) In region\(-I\) and \(III\), the reaction is of first and zero order respectively \((D)\) In region\(-II\), the reaction is of first order \((E)\) In region\(-II\), the order of reaction is in the range of \(0.1\) to \(0.9\).
JEE Mains 2023 Hard - If \(n\) arithmetic means are inserted between a and \(100\) such that the ratio of the first mean to the last mean is \(1: 7\) and \(a+n=33\), then the value of \(n\) isJEE Mains 2022 Hard
- A body of mass \(M\) and charge \(q\) is connected to a spring of spring constant \(k\). It is oscillating along \(x-\) direction about its equilibrium position, taken to be at \(x = 0\), with an amplitude \(A\). An electric field \(E\) is applied along the \(x-\) direction. Which of the following statements is correct?JEE Mains 2018 Hard
- Let \(\vec a,\vec b\;\) and \(\;\vec c\) be three unit vectors such that \(\vec a \times \left( {\vec b \times \vec c} \right) = \frac{{\sqrt 3 }}{2}\left( {\vec b + \vec c} \right)\) . If \(\vec b\) is not parallel to \(\vec c\) then angle between \(\vec a\;\) and \(\;\vec b\) is :JEE Mains 2016 Medium
- In the Young's double slit experiment the intensity produced by each one of the individual slits is \(I_0\). The distance between two slits is 2 mm . The distance of screen from slits is 10 m . The wavelength of light is \(6000\) Å. The intensity of light on the screen in front of one of the slits is _________ .JEE Mains 2026 Medium