MCQ
An exothermic reaction is one which
- ATakes place only on heating
- BIs accompanied by a flame
- CIs accompanied by a absorption of heat
- ✓Is accompanied by evolution of heat
✓
Answer
Correct option: D.
Is accompanied by evolution of heat
(d)In exothermic reactions heat is evolute.
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
A gas is found to have the formula (CO)x. Its vapour density is 70. The value of x will be:
% composition requires ................ of the compound :
Decreasing order of $C-C$ bond length is
→$I.$ ${C_2}{H_4}$ $II.$ ${C_2}{H_2}$
$III.$ ${C_6}{H_6}$ $IV.$ ${C_2}{H_6}$
Which of the following upon hydrolysis can produce a hydrocarbon that has the same degree of unsaturation as are the number of carbon atoms present in the produced hydrocarbon
For a cyclic process, the change in internal energy of the system is _______________ .
$\begin{matrix}
C{{H}_{3\,\,\,\,\,\,\,\,\,\,\,}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}-C=CH-C{{H}_{3}} \\
\end{matrix}\xrightarrow{Hg{{(OAc)}_{2}}/EtOH}\underset{(90\%)}{\mathop{(A)}}\,$
→C{{H}_{3\,\,\,\,\,\,\,\,\,\,\,}} \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}-C=CH-C{{H}_{3}} \\
\end{matrix}\xrightarrow{Hg{{(OAc)}_{2}}/EtOH}\underset{(90\%)}{\mathop{(A)}}\,$
Product $(A)$ of the above reaction is
In which of the following the photoelectric effect will occur easily?
If the shortest wavelength of $H-$ atom in Lyman series is $x$ , then longest wavelength in Balmer series of $He^+$ is
→The $IUPAC$ name of the following compound is :
→Given below are two statements:
→Statement $I$ : Nickel is being used as the catalyst for producing syn gas and edible fats.
Statement $II$ : Silicon forms both electron rich and electron deficient hydrides.
In the light of the above statements, choose the most appropriate answer from the options given below: