MCQ
On bromination, propionic acid yields two isomeric $2-$bromopropionic acids. This pair is an important example of
- AChain isomers
- ✓Optical isomers
- CCis-trans isomers
- DPosition isomers
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| List-$I$ (Molecule) | List-$II$(Shape) |
| $A$ $\mathrm{NH}_3$ | $I$ Square pyramid |
| $B$ $\mathrm{BrF}_5$ | $II$ Tetrahedral |
| $C$ $\mathrm{PCl}_5$ | $III$ Trigonal pyramidal |
| $D$ $\mathrm{CH}_4$ | $IV$ Trigonal bipyramidal |
Choose the correct answer from the option below :
$(A)$ Atoms of different elements differ in mass.
$(B)$ Matter consists of divisible atoms.
$(C)$ Compounds are formed when atoms of different element combine in a fixed ratio.
$(D)$ All the atoms of given element have different properties including mass.
$(E)$ Chemical reactions involve reorganisation of atoms.
Choose the correct answer from the options given below :
$I_{2(g)} \rightleftharpoons 2I_{(g)} ; \Delta_f H^o = +150\,kJ$
The forward reaction is favoured at