Question:
Which of the following order is wrong :
Which of the following order is wrong :
Updated On: May 2, 2026
NH3 < PH3 < AsH3 – Acidic
Li < Be < B < C – Ist IP
Al2O3 < MgO < Na2O < K2O - Basic
Li+< Na+< K+< Cs+- Ionic radius
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
The correct option is (B) : Li < Be < B < C – Ist IP
Li⟶1s22s1; Be⟶1s22s2;B⟶1s22s22p1;C⟶1s22s22p2
Li<B<Be<C
Be is having higher ionization potential than B as Be has fully filled 2s− orbital due to which it gets extra stability.
Li⟶1s22s1; Be⟶1s22s2;B⟶1s22s22p1;C⟶1s22s22p2
Li<B<Be<C
Be is having higher ionization potential than B as Be has fully filled 2s− orbital due to which it gets extra stability.
Was this answer helpful?
0
0
Top NEET Chemistry Questions
- A $100.0\, mL$ dilute solution of $Ag ^{+}$is electrolysed for $15.0$ minutes with a current of $1.25 \,mA$ and the silver is removed completely. What was the initial $\left[ Ag ^{+}\right]$?
- Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant externalpressureof2bar Theworkdonebythe gas i s : [Given that 1Lbar= 100J)
- Unit of entropy is : -
- For a reaction, activation energy E$_a$=0 and the rate constant at 200K is 1.6×10$^6$s$^{-1}$. The rate constant at 400K will be- [Given that gas constant] R= 8.314 J K$^{-1}$ mol$^{-1}$
- Half-life period of a first order reaction is $1386\, s.$ The specific rate constant of the reaction is
View More Questions
Top NEET p -Block Elements Questions
- Match the interhalogen compounds of column-I with the geometry in column II and assign the correct. code.
Column I Column II (a) $XX'$ (i) T-shape (b) $XX'_3$ (ii) Pentagonal bipyramidal (c) $XX'_5$ (iii) Linear (d) $XX'_7$ (iv) Square-pyramidal (v) Tetrahedral - The substance used as a smoke screen in war fare is
- Nitrogen form N2, but phosphorous form P2, it's at a time convert in P4, reason is
- For the second period elements the correct increasing order of first ionisation enthalpy is :
- Match List-I with List – II :
List-I (Oxoacids of Sulphur) List-II (Bonds) A Peroxodisulphuric acid I Two S–OH, Four S=O, One S–O–S B Sulphuric acid II Two S–OH, One S=O C Pyrosulphuric acid III Two S–OH, Four S=O, One S–O–O–S D Sulphurous acid IV Two S–OH, Two S=O Choose the correct answer from the options given below.
View More Questions
Top NEET Questions
- A $100.0\, mL$ dilute solution of $Ag ^{+}$is electrolysed for $15.0$ minutes with a current of $1.25 \,mA$ and the silver is removed completely. What was the initial $\left[ Ag ^{+}\right]$?
- The time constant of C-R circuit is
- The chronological order of human evolution from early to the recent is
- The correct Boolean operation represented by the circuit diagram drawn is :
- The driver of a car travelling with speed $30\, m/sec$ towards a hill sounds a horn of frequency $600\, Hz.$ If the velocity of sound in air is $330\, m/s,$ the frequency of reflected sound as heard by driver is
View More Questions
Concepts Used:
P-Block Elements
- P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
- P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
P block elements consist of:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family