MCQ
Atoms combine through the:
- AInteraction of protons
- BPresence of catalyst
- CInteraction of electrons
- DRise in temperature
Explanation:
Atoms are unstable, either they lack electrons or they have excess of them in their valence shell. Therefore atoms combine with other atoms to become stable i.e. to get nearest noble gas configuration.
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|
List$-I$ (Metal Ion) |
List$-II$ (Group in Qualitative analysis) |
| $(a)$ ${Mn}^{2+}$ | $(i)$ Group $- III$ |
| $(b)$ ${A} {s}^{3+}$ | $(ii)$ Group $- IIA$ |
| $(c)$ ${Cu}^{2+}$ | $(iii)$ Group $- IV$ |
| $(d)$ ${Al}^{3+}$ | $(iv)$ Group $- IIB$ |
Choose the most appropriate answer from the options given below :
${C_6}{H_5}(l)\, + \,\frac{{15}}{2}\,{O_2}(g)\, \to \,6\,C{O_2}(g)\, + \,3{H_2}O\,(l);$ $\Delta H = \,-\,3271\,kJ$
What is $\Delta U$ for the combustion of $1.5\,mole$ of benzene at $27\,^oC$ ? .....$kJ$
$NH_4NO_3(s) \rightarrow N_2O(g) + 2H_2O(l)$