MCQ
Which element is monoatomic gas at room temperature?
- ✓$Ne$
- B$F$
- C$\mathrm{O}_2$
- D$\mathrm{\sim N}_2$
✓
Answer
Correct option: A.
$Ne$
$Ne$ is noble gas so it will exists as monoatomic gas at room temperature.
All other gases exists in dimer form as $\mathrm{F}_2, \mathrm{~N}_2$ and $\mathrm{O}_2$
All other gases exists in dimer form as $\mathrm{F}_2, \mathrm{~N}_2$ and $\mathrm{O}_2$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Assertion : Boiling and melting points of amides are higher than corresponding acids.
Reason : It is due to strong intermolecular hydrogen bonding in their molecules.
Reason : It is due to strong intermolecular hydrogen bonding in their molecules.
Propionic acid with $Br_2/P$ yields a dibromo product. Its structure would be
→In the following reaction sequence the major products $B$ is
→Which of the following statements are true about semiconductors?
→- Silicon doped with electron rich impurity is a $p-$type semiconductor.
- Silicon doped with an electron rich impurity is an $n-$type semiconductor.
- Delocalised electrons increase the conductivity of doped silicon.
- An electron vacancy increases the conductivity of $n-$type semiconductor.
Select the incorrect match
Consider separate solutions of $0.500\, M\, C_2H_5OH\,(aq),$ $0.100\,M\,Mg_3(PO_4)_2\, (aq), $ $0.250\, M\,KBr\,(aq)$ and $0.125\, M\,Na_3PO_4\,(aq)$ at $25^o C.$ Which statement is true about these solutions, assuming all salts to be strong electrolytes ?
→Which of the following tests cannot be used for identifying amino acids?
Consider the reaction :
→$Cl_2(aq) + H_2S(aq) \to S(s) + 2H^+(aq) + 2Cl^-(aq)$
The rate equation for this reaction is rate $= k[Cl_2][H_2S]$ Which of these mechanisms is/are consistent with this rate equation ?
$A.\,C{l_2} + {H_2}S \to {H^ + } + C{l^ - } + C{l^ + } + H{S^- }$ (slow)
$C{l^ + } + H{S^ - } \to {H^ + } + C{l^ - } + {S}$ (fast)
$B.\, H_2S \Leftrightarrow H^+ + HS^-$ (fast equilibrium)
$Cl_2 + HS^-\to 2Cl^-+ H^+ + S$ (slow)
$Co|Co^{2+}(C_2)||Co^{2+}(C_1)|Co$, for this cell, $\Delta G$ is negative if
→The total number of $C - C$ sigma bond/s in mesityl oxide $\left( C _{6} H _{10} O \right)$ is ...... . (Round off to the Nearest Integer).
→