MCQ
Which of the following forms vortex ring?
- ✓$\mathrm{P}_2 \mathrm{O}_5$
- B$ \mathrm{PH}_3 $
- C$ \mathrm{NH}_3$
- D$ \mathrm{P}_2 \mathrm{O}_{10}$
✓
Answer
Correct option: A.
$\mathrm{P}_2 \mathrm{O}_5$
Phosphine forms vortex rings of $\mathrm{P}_2 \mathrm{O}_5$ when it comes in contact of air. These rings are in form of white smoke.
$\therefore$ They are used in making smoke screens in warfare.
$\therefore$ They are used in making smoke screens in warfare.
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
Which one of these shows least $-\ I$ effect :
→In a reversible reaction $\mathrm{H}_2+\mathrm{I}_2 \leftrightharpoons 2 \mathrm{HI}$, if the concentration of $H_2$ and $I_2$ are increased, the value of $Kc:$
→Which is not possible
The solubility product of lead bromide is $8\times10^{-5}$. If the salt is $80\%$ dissociated in saturated solution, find the solubility of the salt
→Which of the following have same number of significant figures?
→(A) $0.00253$ (B) $1.0003$ (C) $15.0$ (D) $163$
Choose the correct answer from the options given below
Aluminium is usually found in $+3$ oxidation state. In contrast, thallium exists in $+1$ and $+3$ oxidation states. This is due to
→Which of the following compounds can be best prepared by Wurtz reaction?
A compound contains atoms of three elements in $A, B$ and $C$. If the oxidation number of $A$ is $+2, B$ is $+5$ and that of $C$ is $-2$, the possible formula of the compound is
→The most stable carbocation for the following is:
Given are two statements one is labelled as Assertion $A$ and other is labelled as Reason $R$.
→Assertion $A$ :Magnesium can reduce $Al _{2} O _{3}$ at a temperature below $1350^{\circ} C$, while above $1350^{\circ} C$ aluminium can reduce $MgO$.
Reason $R$ : The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements. choose most appropriate answer from the options given below