Question:
Statement I: Of the following compounds \( SO_2, SO_3, H_2S, SF_4 \); only three compounds have a complete octet.
Statement II: For the given set of compounds \([SF_4, BrF_5, ClF_3], [NH_3, BrF_5, SF_4], [H_2O, IF_5, XeF_4]\) only one set of compounds has one lone pair on all central atoms.
Statement I: Of the following compounds \( SO_2, SO_3, H_2S, SF_4 \); only three compounds have a complete octet.
Statement II: For the given set of compounds \([SF_4, BrF_5, ClF_3], [NH_3, BrF_5, SF_4], [H_2O, IF_5, XeF_4]\) only one set of compounds has one lone pair on all central atoms.
Statement II: For the given set of compounds \([SF_4, BrF_5, ClF_3], [NH_3, BrF_5, SF_4], [H_2O, IF_5, XeF_4]\) only one set of compounds has one lone pair on all central atoms.
Show Hint
In molecules like \( SF_4 \), \( BrF_5 \), and \( ClF_3 \), pay attention to the number of lone pairs on the central atom when determining the octet rule and lone pair distribution.
Updated On: Apr 7, 2026
- Both Statement I and Statement II are correct
- Statement I is incorrect but Statement II is correct
- Statement I is correct but Statement II is incorrect
- Both Statement I and Statement II are incorrect
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Analysis of Statement I.
- \( SO_2 \) has 8 electrons around sulfur (complete octet).
- \( SO_3 \) has 8 electrons around sulfur (complete octet).
- \( H_2S \) has 8 electrons around sulfur (complete octet).
- \( SF_4 \) has 10 electrons around sulfur (not a complete octet). Hence, only three compounds, \( SO_2, SO_3, H_2S \), have a complete octet. Therefore, Statement I is incorrect because \( SF_4 \) does not have a complete octet.
Step 2: Analysis of Statement II.
Let's examine the lone pairs on the central atoms of the given compounds: - \( SF_4 \) has 1 lone pair on the central atom (sulfur).
- \( BrF_5 \) has 1 lone pair on the central atom (bromine).
- \( ClF_3 \) has 2 lone pairs on the central atom (chlorine).
- \( NH_3 \) has 1 lone pair on nitrogen.
- \( BrF_5 \) has 1 lone pair on the central atom (bromine).
- \( SF_4 \) has 1 lone pair on the central atom (sulfur).
- \( H_2O \) has 2 lone pairs on oxygen.
- \( IF_5 \) has 1 lone pair on iodine.
- \( XeF_4 \) has 2 lone pairs on xenon.
Thus, only the set \([SF_4, BrF_5, SF_4]\) has 1 lone pair on all central atoms. Therefore, Statement II is correct.
Final Answer: (B) Statement I is incorrect but Statement II is correct
- \( SO_2 \) has 8 electrons around sulfur (complete octet).
- \( SO_3 \) has 8 electrons around sulfur (complete octet).
- \( H_2S \) has 8 electrons around sulfur (complete octet).
- \( SF_4 \) has 10 electrons around sulfur (not a complete octet). Hence, only three compounds, \( SO_2, SO_3, H_2S \), have a complete octet. Therefore, Statement I is incorrect because \( SF_4 \) does not have a complete octet.
Step 2: Analysis of Statement II.
Let's examine the lone pairs on the central atoms of the given compounds: - \( SF_4 \) has 1 lone pair on the central atom (sulfur).
- \( BrF_5 \) has 1 lone pair on the central atom (bromine).
- \( ClF_3 \) has 2 lone pairs on the central atom (chlorine).
- \( NH_3 \) has 1 lone pair on nitrogen.
- \( BrF_5 \) has 1 lone pair on the central atom (bromine).
- \( SF_4 \) has 1 lone pair on the central atom (sulfur).
- \( H_2O \) has 2 lone pairs on oxygen.
- \( IF_5 \) has 1 lone pair on iodine.
- \( XeF_4 \) has 2 lone pairs on xenon.
Thus, only the set \([SF_4, BrF_5, SF_4]\) has 1 lone pair on all central atoms. Therefore, Statement II is correct.
Final Answer: (B) Statement I is incorrect but Statement II is correct
Was this answer helpful?
0
0
Top JEE Main Chemistry Questions
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- At equilibrium the concentrations of and in a sealed vessel at . What will be for the reaction
- Find out the major products from the following reactions
Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are
- The correct order of atomic radii is:
View More Questions
Top JEE Main Physical Chemistry Questions
- Consider the following equilibrium: \[ 2AB \rightleftharpoons A_2 + B_2 \] If equilibrium pressure is \(P\) and degree of dissociation is \(\alpha\), then \(K_p\) is
- Consider the following electrochemical cell \[ Zn | Zn^{2+}(aq) \, || \, Ag^{+}(aq) | Ag \] \[ [Zn^{2+}] = 1\,M \] The \(E_{cell\) was found to be \(1.6\,V\). The value of \(\log[Ag^+]\) is \[ E^\circ_{Zn^{2+}/Zn} = -0.76\,V , \qquad E^\circ_{Ag^+/Ag} = +0.80\,V \]
- For a first order reaction : \[ \text{A(g)} \rightarrow \text{B(g)} + \text{C(g)} \] If initial pressure is \( P_0 \) and total pressure at time \( t \) is \( P_t \), then the expression of rate constant \( K \) is:
- On heating \(2.76\,\text{g}\) of \( \text{Ag}_2\text{CO}_3 (s) \), some solid residue is left behind. Determine the mass of residue left.
- Determine mole fraction of water in an aqueous solution of urea having \(10\%\) w/w urea.
View More Questions
Top JEE Main Questions
- In a hydrogen like atom, when an electron jumps from the $M$ - shell to the $L$ - shell, the wavelength of emitted radiation is $\lambda$. If an electron jumps from $N$-shell to the $L$-shell, the wavelength of emitted radiation will be :
- Two masses $m$ and $\frac{m}{2}$ are connected at the two ends of a massless rigid rod of length $l$. The rod is suspended by a thin wire of torsional constant $k$ at the centre of mass of the rod-mass system(see figure). Because of torsional constant $k$, the restoring torque is $\tau =k\theta$ for angular displacement $\theta$. If the rod is rota ted by $\theta_0$ and released, the tension in it when it passes through its mean position will be:
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- The value of is
- The number of terms of an is even. The sum of the odd terms is and of the even terms is . The last term exceeds the first by . Then the number of terms in the series is ______.
View More Questions