MCQ
The ratio between radii of $H{e^ + }$ ion and $H$ atom is
- A$0.5$
- ✓$1$
- C$1.5$
- D$2$
✓
Answer
Correct option: B.
$1$
b
$(b)$ Value of $Z$ for hydrogen =$1$
$(b)$ Value of $Z$ for hydrogen =$1$
Value of $Z$ for helium = $2$
Value of $n$ for both is = $1$
${r_H} = \frac{{0.52 \times {1^2}}}{1}$
${r_{H{e^ + }}} = \frac{{0.52 \times {1^2}}}{1}$$\frac{{{r_H}}}{{{r_{H{e^ + }}}}} = 1:1$ or ${r_{H{e^ + }}}:{r_H} = 1:1$
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 schematic plot of versus inverse of temperature for a reaction is shown below The reaction must be
$STATEMENT$-$1$: In water, orthoboric acid behaves as a weak monobasic acid. because
→$STATEMENT$-$2$: In water, orthoboric acid acts as a proton donor.
The ground state term symbol for an electronic state is governed by
In the above reaction $o/p$ ratio will be highest when
→Among the following, the molecule expected to be stabilized by anion formation is
Which of the following compounds will exhibit geometrical isomerism?
In photoelectric effect, the photocurrent
The correct electronic configuration of $Ti(Z = 22)$ atom is
→Which is not obtained when metal carbides react with $H_2O$ ?
→A compound contains atoms of three elements in $A, B$ and $C$. If the oxidation number of $A$ is $+2, B$ is $+5$ and that of $C$ is $-2$, the possible formula of the compound is
→