NEET · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and Cl are not the same.
C. \(Ar , K ^{+}, Cl ^{-}, Ca ^{2+}\), and \(S ^{2-}\) are all isoelectronic species.
D. The correct order of the first ionization enthalpies of \(Na , Mg , Al\), and Si is \(Si > Al > Mg > Na\).
E. The atomic radius of Cs is greater than that of Li and Rb .
Choose the correct answer from the options given below
- A A, B and E only
- B C and E only
- C C and D only
- D A, C and E only
Answer & Solution
Correct Answer
(B) C and E only
Step-by-step Solution
Detailed explanation
(C) \(Ca ^{2+}, K ^{+}, Ar , Cl ^{-}, S ^{2-}\) all species have 18 electrons that's why these are isoelectronic species.
(E) Radius order \(Cs > Rb > K > Na > Li\)
(E) Radius order \(Cs > Rb > K > Na > Li\)
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
- Which of the following molecules is non-polar in nature?NEET 2021 Easy
- Which of the following statements is incorrect?NEET 2017 Medium
- Which of the following lanthanoid ions is diamagnetic ? (At. nos. \(Ce = 58, Sm = 62,\)\( Eu = 63, Yb = 70\))NEET 2013 Medium
- The outer electronic configuration of \(Gd \ (At. \ No. \ 64)\) isNEET 2013 Hard
- The conductivity of centimolar solution of \(KCl\) at \(25^{\circ}\,C\) is \(0.0210\,ohm ^{-1}\,cm ^{-1}\) and the resistance of the cell containing the solution at \(25^{\circ}\,C\) is \(60\,ohm\). The value of cell constant is \(.........\,cm ^{-1}\)NEET 2023 Hard
- Equal masses of \(H_2, O_2\) and methane have been taken in a container of volume \(V\) at temperature \(27\, ^o C\) in identical conditions. The ratio of the volumes of gases \(H_2 : O_2 :\) methane would beNEET 2014 Medium
More PYQs from NEET
- Identify the incorrect pair.NEET 2021 Medium
- Figure shows a circuit that contains three identical resistors with resistance \(R = 9.0 \,\,\Omega\) each, two identical inductors with inductance \(L = 2.0\, mH\) each, and an ideal battery with \(emf\,\, = 18 \,\,V.\) The current \(i\) through the battery just after the switch closed is
NEET 2017 Medium - The ratio of coulomb's electrostatic force to the gravitational force between an electron and a proton separated by some distance is \(2.4 \times 10^{39}\). The ratio of the proportionality constant, \(K=\frac{1}{4 \pi \varepsilon_0}\) to the Gravitational constant \(G\) is nearly (Given that the charge of the proton and electron each \(=1.6 \times 10^{-19}\; C\), the mass of the electron \(=9.11 \times 10^{-31}\; kg\), the mass of the proton \(=1.67 \times 10^{-27}\,kg\) ):NEET 2022 Medium
- Given below are two statements
Statement I : A hypothetical diatomic molecule with bond order zero is quite stable.
Statement II : As bond order increases, the bond length increase.
In the light of the above statements, choose the most appropriate answer from the options given below :NEET 2025 Medium - The Floral Diagram represents which one of the following families ?
NEET 2022 Medium - The tendency to form monovalent compounds among the Group \(13\) elements is correctly exhibited in :NEET 2017 Easy