MCQ
Bohr’s atomic theory gave the idea of :
- AQuantum numbers
- BShape of sublevels
- CNucleus
- ✓Stationary states
✓
Answer
Correct option: D.
Stationary states
d
The Bohr's atomic theory explains about the presence of stable orbits or stationary states. This theory thus was able to overcome drawback of Rutherford's theory.
The Bohr's atomic theory explains about the presence of stable orbits or stationary states. This theory thus was able to overcome drawback of Rutherford's theory.
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The reaction of one mol of bromine with ethyne yields:
Number of molecules having bond order $2$ from the following molecule is. . . . . . . $\mathrm{C}_2, \mathrm{O}_2, \mathrm{Be}_2, \mathrm{Li}_2, \mathrm{Ne}_2, \mathrm{~N}_2, \mathrm{He}_2$
→The statement$(s)$ that are correct about the species $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}$and $\mathrm{Mg}^{2+}$.
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$(D)$ $\mathrm{Mg}^{2+}$ has the smallest ionic radii
Choose the most appropriate answer from the options given below :
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The equilibrium constant for the given reaction ${H_2} + {I_2}$ $\rightleftharpoons$ $2HI$ is correctly given by expression
→$\,$
→A compound $X$ contains $32 \%$ of $A, 20 \%$ of $B$ and remaining percentage of $C$. Then, the empirical formula of $X$ is :
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Assertion : The radius of the first orbit of hydrogen atom is $0.529\,\mathop A\limits^o$
Reason : Radius of each circular orbit $(r_n) - 0.529\,\mathop A\limits^o \,(n^2/Z),$ where $n = 1, 2, 3$ and $Z =$ atomic number.
→Reason : Radius of each circular orbit $(r_n) - 0.529\,\mathop A\limits^o \,(n^2/Z),$ where $n = 1, 2, 3$ and $Z =$ atomic number.