MCQ
$pH$ of human blood is $7.4$ . Then ${H^ + }$ concentration will be
- ✓$4 \times {10^{ - 8}}$
- B$2 \times {10^{ - 8}}$
- C$4 \times {10^{ - 4}}$
- D$2 \times {10^{ - 4}}$
$[{H^ + }] = 4 \times {10^{ - 8}}M$
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${H_2}(g) + {I_2}(g) \rightleftharpoons 2HI(g)$
is $32$ at a given temperature. The equilibrium concentrations of $I_2$ and $HI$ are $0.5 \times 10^{-3}\, M$ and $8 \times 10^{-3}\, M$ respectively. the equilibrium concentration of $H_2$ is
$II.$ The ionization energy generally increases with increasing atomic number in a period.
$III.$ The electronegativity of an element is the tendency of an isolated atom to attract an electron.
Which of the above statements is/are correct?