Download App

STD 11 - 9. Hydricarbon — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 9. Hydricarbon4 Marks
MCQ
Knocking sound occurs in engine when fuel
  • A
    Ignites slowly
  • ✓
    Ignites rapidly
  • C
    Contains water
  • D
    Is mixed with machine oil
✓

Answer

Correct option: B.
Ignites rapidly
b
(b)Knocking - Sudden and irregular burning of the fuel mixture causing jerks against the piston and gives rise to violent sound. This is known as knocking.

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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

When an acidified solution of ferrous ammonium sulphate it treated with potassium permanganate solution, the ion which is oxidised is
→
The compound $(SiH_3)_3N$ is expected to be
→
General electronic configuration of outermost and penultimate shell is $(n -1)\, s^2 \,(n -1)p^6(n -1)\, d^x\, ns^2$. If $n = 4$ and $x = 5$, then number of protons in the nucleus will be :-
→
${H_2}S$ reacts with halogens, the halogens
→
Which of the following is $2$ -carboxy ethyl ?
→
The human body does not produce
→
$N_2(g) + 3H_ 2(g)  \rightleftharpoons 2NH_3(g); K_1$

$ NH_3(g)  \rightleftharpoons \frac{1}{2}\,{N_2}\left( g \right) + \frac{3}{2}{H_2}\left( g \right);\,{K_2}$

$\frac{1}{2}\,{N_2}\left( g \right) + \frac{3}{2}{H_2}\left( g \right)  \rightleftharpoons NH_3(g); K_3$

$2NH_3(g)  \rightleftharpoons N_2(g) + 3H_2(g); K_4$

If $K_1 = K_2^x = K_3^y = K_4^z$ then correct values of $x, y$ and $z$ are respectively

→
The strongest acid among the following aromatic compounds is
→
Which of the following is paramagnetic
→
$K^+, Cl^-, Ca^{2+}$ and $S^{2-}$ ions are isoelectronic. The decreasing order of their radius is
→