AP EAMCET · Chemistry · Classification of Elements and Periodicity in Properties
Arrange \(L \dot{I}, \mathrm{Be}, \mathrm{B}\) and \(\mathrm{C}\) in decreasing order of their first ionisation enthalpies.
- A Li \(>\) B \(>\) Be \(>\) C
- B C \(>\) Li \(>\) Be \(>\) B
- C \(\mathrm{C}>\mathrm{Be}>\mathrm{B}>\mathrm{Li}\)
- D \(\mathrm{C}>\mathrm{B}>\mathrm{Be}>\mathrm{Li}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{C}>\mathrm{Be}>\mathrm{B}>\mathrm{Li}\)
Step-by-step Solution
Detailed explanation
As we go from left to right in period the ionisation potential increases but \(\mathrm{Be}\) and \(\mathrm{B}\) are exception as the Be has \(1 s^2, 2 s^2\) and boron has \(1 s^2, 2 s^2, 2 p^1\) so it's easy to remove electron from boron than berylium decreasing order of their…
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
- Dipole moment of \(\mathrm{HCl}=1.03 \mathrm{D}, \mathrm{HI}=0.38 \mathrm{D}\). Bond length of \(\mathrm{HCl}=1.3 Ã…\) and \(\mathrm{HI}=1.6 Ã…\). The ratio of fraction of electric charge, \(\delta\), existing on each atom in \(\mathrm{HCl}\) and \(\mathrm{HI}\) isAP EAMCET 2009 Easy
- Which of the following statements are correct?
a) In maltose, C-1 of one \(\alpha-\mathrm{D}\)-glucose is linked to \(\mathrm{C}-4\) of second \(\alpha-\mathrm{D}\)-glucose
b) Quaternary structure of protein represents spatial arrangement of two or more polypeptide chains with respect to each other
c) Nucleotide units in a nucleic acid are joined to each other through a phosphodiester linkage
d) Abnormally low level of thyroxine leads to hypothyroidismAP EAMCET 2017 Easy - Identify the correct statement from the following with respect to high density polytheneAP EAMCET 2023 Easy
- Identify the two reactions \(\mathrm{A}(\mathrm{I} \rightarrow \mathrm{II})\) and \(\mathrm{B}(\mathrm{I} \rightarrow \mathrm{III})\) respectively in the following set of reactions.
AP EAMCET 2025 Medium - At \(T(\mathrm{~K})\), the equilibrium constant of \(\mathrm{H}_2(\mathrm{~g})+\mathrm{I}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})\) is 49 . If \(\left[\mathrm{H}_2\right],\left[\mathrm{I}_2\right]\) at equilibrium at the same temperature are \(2.0 \times 10^{-2} \mathrm{M}\) and \(8.0 \times 10^{-2} \mathrm{M}\) respectively, the [HI] at equilibrium in \(\mathrm{mol} \mathrm{L}^{-1}\) isAP EAMCET 2018 Medium
- What is \(\mathrm{E}_{\text {cell }}\) (in V) of the following cell at 298 K ?
\(\left(\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\ominus}=-0.76 \mathrm{~V} ; \mathrm{E}_{\mathrm{Ni}^{2+} / \mathrm{Ni}}^{\ominus}=-0.25 \mathrm{~V} ; \frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.06 \mathrm{~V}\right)\)
\(\mathrm{Zn}(\mathrm{s})\left|\mathrm{Zn}^{2+}(0.01 \mathrm{M}) \| \mathrm{Ni}^{2+}(0.1 \mathrm{M})\right| \mathrm{Ni}(\mathrm{s})\)AP EAMCET 2025 Medium
More PYQs from AP EAMCET
- Carrot and curd are sources for the vitamins respectivelyAP EAMCET 2024 Easy
- In an organic compound phosphorus is estimated asAP EAMCET 2021 Medium
- A wire of \(20 \Omega\) is immersed in ice. If \(10 \mathrm{~A}\) current is passed through this wire for 1 minute, ice completely melts. The mass of the ice is nearly \(\left(L_{\text {ice }}=79.7 \mathrm{calg}^{-1}\right)\)AP EAMCET 2018 Easy
- The vertex \(A\) of a triangle lies on the lines \(x+y=1\) and \(2 x+3 y=6\). If the orthocentre of the triangle is \(O\left(\frac{3}{7}, \frac{22}{7}\right)\), then the equation of \(O A\) in the normal form isAP EAMCET 2018 Medium
- The number of normals drawn to the parabola \(y^2=4 x\) from the point \((1,0)\) isAP EAMCET 2009 Easy
- If the straight lines \(2 x+3 y-1=0\), \(x+2 y-1=0\) and \(a x+b y-1=0\) form a triangle with orthocentre at the origin, then \((a, b)=\)AP EAMCET 2018 Medium