Download App

The s-block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe s-block Elements1 Mark
MCQ
Molten sodium is used in nuclear reactors to:
  • A
    Absorb neutrons in order to control the chain reaction
  • B
    Slow down the fast neutrons
  • ✓
    Absorb the heat generated by nuclear fission
  • D
    Extract radio$-$isotopes produced in the reactor
✓

Answer

Correct option: C.
Absorb the heat generated by nuclear fission
Molten sodium is used in nuclear reactors due to its high thermal conductivity properties, it is used as a coolant i.e. to absorb the heat produced during nuclear fission.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from The s-block Elements→The s-block Elements — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The $S$ - enantiomer of ibuprofen is responsible for its pain-relieving properties.Which one of the following structures shown below is $(S)$ -ibuprofen ?
→
$IUPAC$ name of the compound is $\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
  {C{H_3}C{H_2}C{H_2}C{H_2}C{H_2} - CH - C - C{H_2}C{H_3}} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,C{H_2}C{H_2}C{H_3}\,\,\,} 
\end{array}$
→
Solubility product of a salt $AB$ is $1\times10^{-8}$ in a solution in which the concentration of $A^+$ ions is $10^{-3}\, M$. The salt will precipitate when the concentration of $B^-$ ions is kept
→
Which of the following is not correct ?
→
The molar solubility of $\mathrm{Zn}(\mathrm{OH})_{2}$ in $0.1 \,\mathrm{M} \,\mathrm{NaOH}$ solution is $\mathrm{x} \times 10^{-18} \,\mathrm{M}$. The value of $\mathrm{x}$ is ...... . (Nearest integer)

(Given : The solubility product of $\mathrm{Zn}(\mathrm{OH})_{2}$ is $\left.2 \times 10^{-20}\right)$

→
The total energy of the electron of $H-$ atom in the second quantum state is $-E_2$ . The total energy of the $He^+$ atom in the third quantum state is
→
The heat of combustion of ethylene $C_2H_4(g)$ is $-1420\,kJ/mole$ . The number of litres of $C_2H_4$ at $NTP$ that would evolve $355\,kJ$ on combustion is
→
Lead pipes are not suitable for drinking water because
→
Calculate the equilibrium constant for the reaction $H_2(g) + CO_2(g) \rightleftharpoons H_2O(g) + CO(g)$ at $1395 \,K$ by using following datas

$2H_2O(g) \rightleftharpoons 2H_2(g) + O_2(g); K_1 = 2.1 \times 10^{-13}$

$2CO_2(g) \rightleftharpoons 2CO(g) + O_2(g); K_2 = 1.4 \times 10^{-12}$

→
Highest covalent character is found in
→