Iso-octane is mixed to the petrol - Vidyadip

MCQ

Iso-octane is mixed to the petrol

A
To precipitate inorganic substances
B
To prevent freezing of petrol
C
To increase boiling point of petrol
✓
As an antiknock

✓

Answer

Correct option: D.

As an antiknock

d
One member of the octane family, isooctane, is used as a reference standard to benchmark the tendency of gasoline or $LPG$ fuels to resist self-ignition. For example, gasoline with the same knocking characteristics as a mixture of $90 \,\%$ iso-octane and $10 \,\%$ heptane would have an octane rating of $90$

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 9. Hydricarbon→9. Hydricarbon — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The space between proton and electron in hydrogen atom is :

Which of the following alkene is most stable

Strongest acid is

The compound formed as a result of oxidation of propyl benzene by hot alkaline $\mathrm{KMnO}_4$ is :

Rutherford’s experiment on scattering of $\alpha -$ particles showed for the time that the atom has

A gas (Molar mass $=280\,g\,mol ^{-1}$ ) was burnt in excess $O _{2}$ in a constant volume calorimeter and during combustion the temperature of calorimeter increased from $298.0 K$ to $298.45\,K$. If the heat capacity of calorimeter is $2.5\,kJ\,K ^{-1}$ and enthalpy of combustion of gas is $9\,kJ\,mol ^{-1}$ then amount of gas burnt is $......g$. (Nearest Integer)

In which of the following $\Delta E = \Delta H$

Among $\left[\mathrm{I}_3\right]^{+},\left[\mathrm{SiO}_4\right]^{+}, \mathrm{SO}_2 \mathrm{Cl}_2, \mathrm{XeF}_2, \mathrm{SF}_4, \mathrm{ClF}_3, \mathrm{Ni}(\mathrm{CO})_4, \mathrm{XeO}_2 \mathrm{~F}_2,\left[\mathrm{PtCl}_4\right]^{2-}, \mathrm{XeF}_4$, and $\mathrm{SOCl}_2$, the total number of species having $s p^3$ hybridised central atom is. . . . .

Which of the following is correct with respect to $-I$ effect of the substituents ? ($R =$ alkyl)

Assertion : Boron is metalloid.

Reason : Boron shows metallic nature.