MCQ
Which is represented by the formula ${C_n}{H_{2n - 2}}$
  • A
    Alkane
  • Alkyne
  • C
    Alkene
  • D
    None of these

Answer

Correct option: B.
Alkyne
b
$C _{ n } H _{2 n +2}$ is the standard formula for alkanes. These are called saturated hydrocarbons. It means all carbon atoms are bonded to the maximum amount of hydrogen atoms possible, i.e. saturated with hydrogen. $C _{ n } H _{2 n }$ is the standard formula for alkenes.

$C _{ n } H _{2 n -2}$ is the standard formula for alkynes.

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

Similar questions

Radius of the nucleus is equal to $10^{-12}\, cm.$ and that of the atom is equal to $10^{-8} \,cm.$ What is the fraction of the volume of the atom occupied by nucleus ?
Which diagram of ionization energy is correct ?
What is $Z$ in the following sequence of reaction

$Z\xrightarrow{{PC{l_5}}}X\xrightarrow{{Alc.KOH}}Y\xrightarrow{{dil{H_2}S{O_4}}}Z$

A mixture of $100\, m\, mol$ of $Ca(OH)_2$ and $2\, g$ of sodium sulphate was dissolved in water and the volume was made upto $100\, mL$. The mass of calcium sulphate formed and the concentration of $OH^-$ in resulting solution, respectively are 

(Molar mass of $Ca(OH)_2, Na_2SO_4$ and $CaSO_4$ are $74, 143$ and $136\, g\, mol^{-1}$ respectively; $K_{sp}$ of $Ca(OH)_2$ is $5.5 \times 10^{-6}$)

A liquid solution is formed by mixing $10\,\,moles$  of aniline and $20\,\,moles$ of phenol at temperature where the vapour pressure of pure liquid aniline and phenol are $90\,$ and $\,87\,\,mmHg$  respectively. The possible vapoure pressure of solution at that temperature is ............. $mm\,Hg$.
Number of compounds from the following which cannot undergo Friedel-Crafts reactions is ............ toluene, nitrobenzene, xylene, cumene, anline, chlorobenzene, $m$-nitroaniline, $m$-dinitrobenzene
Number of alkanes obtained on electrolysis of a mixture of $\mathrm{CH}_3 \mathrm{COONa}$ and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{COONa}$ is_____.
$XeF_2$ is isostructural with

Match List-l with List-ll:

List-l
(Oxoacids of Phosphorus)
List-ll
(Bonds of Phosphorus)
(A) Hypophosphorus Acid(I) Two P-OH
One P-H
One P = 0
(B) Orthophosphorus Acid(II) Four P-OH
Two P = 0
One P-P
(C) Pyrophosphorus Acid(III) One P-OH
Two P-H
One P = 0
(D) Hypophosphoric Acid(IV) Two P-OH
Two P-H
Two P = 0

Choose the correct answer from the options given below:

For a reaction $X + Y \rightleftharpoons 2\, Z , 1.0 mol$ of $X , 1.5$ mol of $Y$ and $0.5\, mol$ of $Z$ were taken in a $1$ $L$ vessel and allowed to react. At equilibrium, the concentration of $Z$ was $1.0\, mol\, L ^{-1}$. The equilibrium constant of the reaction is $-\frac{x}{15} .$ The value of $x$ is........