MHT CET · Chemistry · s Block Elements

Which among the following elements is used in nuclear reactors as moderator?

A Mg
B Ca
C \(\mathrm{Be}\)
D K

Verified Solution

Answer & Solution

Correct Answer

(C) \(\mathrm{Be}\)

Step-by-step Solution

Detailed explanation

Theory based

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

Which from following catalyst is used in decomposition of \(\mathrm{KCl}_3\) ?

MHT CET 2023 Easy
What is effect of pressure on extent of adsorption?

MHT CET 2022 Medium
Which from following carbohydrates produces double quantity of glucose on hydrolysis per mole as compared with sucrose?

MHT CET 2025 Medium
What is the number of hydrogen atoms present in 5.4 g of urea?

MHT CET 2025 Medium
The rate for reaction \(\mathrm{A}+\mathrm{B} \rightarrow\) product, is \(1.8 \times 10^{-2} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}\). Calculate the rate constant if the reaction is second order in \(\mathrm{A}\) and first order in \(\mathrm{B} .([\mathrm{A}]=0.2 \mathrm{M} ;[\mathrm{B}]=0.1 \mathrm{M})\)

MHT CET 2023 Medium
What is the mass in kg of 5 mole of acetic acid \((\)mol. mass \(=60 \mathrm{~g} \mathrm{~mol}^{-1})?\)

MHT CET 2024 Easy

Explore more questions on app

From MHT CET

If one of the lines given by \(k x^{2}+x y-y^{2}=0\) bisects the angle between the co-ordinate axes, then values of \(k\) are

MHT CET 2020 Medium
For a symmetric (equilateral) prism, the prism formula can be written as

MHT CET 2024 Easy
Identify the product ' B ' in the following series of reactions.
Isopropylcyanide \(\xrightarrow[H \mathrm{HCl}]{\mathrm{SnCl}_2} \mathrm{~A} \xrightarrow{\mathrm{H}_3 \mathrm{O}^{+}} \mathrm{B}+\mathrm{NH}_4 \mathrm{Cl}\)

MHT CET 2024 Medium
Which of the following monomers is used in manufacture of Neoprene rubber?

MHT CET 2020 Easy
Identify the formula of compound (B) formed in following reaction.
(i) Lanthanoids (Ln) burnt in oxygen forming compound (A)
(ii) Compound (A) reacts with \(\mathrm{CO}_{2}\) in excess to form compound (B)

MHT CET 2020 Easy
Calculate the molal elevation constant of solvent if boiling point of 0.12 m solution is 319.8 K (Boling point of solvent \(=319.5 \mathrm{~K}\) )

MHT CET 2025 Easy

Explore more questions on app