COMEDK · Chemistry · 16. Solid State

The coordination number of sodium chloride is

A 4
B 8
C 6
D 12

Verified Solution

Answer & Solution

Correct Answer

(C) 6

Step-by-step Solution

Detailed explanation

Sodium chloride is in simple closed cubic packing. Its coordination number is 6 .

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

In the Molisch reagent, the substance used is

COMEDK 2019 Medium
The time required for \(80 \%\) of a first order reaction is "\(y\)" times the half-life period of the same reaction. What is the value of "\(y\)"?

COMEDK 2024 Medium
Which of the following is the most stable free radical?

COMEDK 2025 Medium
Which of the following is incorrect regarding Henry's law?

COMEDK 2023 Medium
For the reaction, \(\mathrm{Fe}_{2} \mathrm{O}_{3}+3 \mathrm{CO} \longrightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_{2}\), the volume of carbon monoxide required to reduce one mole of ferric oxide is

COMEDK 2017 Medium
A buffer solution has equal volumes of \(0.1 \mathrm{~M} \mathrm{~NH}_4 \mathrm{OH}\) and \(0.01 \mathrm{~M} \mathrm{~NH}_4 \mathrm{Cl}\). The \(\mathrm{pK}_b\) of the base is 5. The \(\mathrm{pH}\) is

COMEDK 2023 Medium

Explore more questions on app

From COMEDK

If \(A=\left[\begin{array}{ll}3 & 4 \\ 1 & 2\end{array}\right]\), then \(A^{-1}\) equal to

COMEDK 2024 Easy
A vertical circular coil of radius \(0.1 \mathrm{~m}\) and having \(10\) turns carries a steady current. When the plane of the coil is normal to the magnetic meridian, a neutral point is observed at the centre of the coil. If \(B_{H}=0.314 \times 10^{-4} \mathrm{~T}\), the current in the coil is

COMEDK 2013 Medium
The complex number \(\frac{(-\sqrt{3}+3 i)(1-i)}{(3+\sqrt{3} i)(i)(\sqrt{3}+\sqrt{3} i)}\), when represented in the Argand diagram lies

COMEDK 2016 Medium
If \(\int \frac{\cos 8 x+1}{\tan 2 x-\cot 2 x} d x=a \cos 8 x+c\), then \(a=\)

COMEDK 2015 Medium
The place \(x-2 y+z=0\) is parallel to the line

COMEDK 2023 Medium
A student answers a multiple choice question with 5 alternatives, of which exactly one is correct. The probability that he knows the correct answer is \(p, 0 < p < 1\). If he does not know the correct answer, he randomly ticks one answer. Given that he has answered the question correctly, the probability that he did not tick the answer randomly, is

COMEDK 2021 Hard

Explore more questions on app