MCQ
An atom of an element $A$ has three electrons in its outermost shell and that of $B$ has six electrons in the outermost shell. The formula of the compound between these two will be
- A${A_3}{B_4}$
- ✓${A_2}{B_3}$
- C${A_3}{B_2}$
- D${A_2}{B_3}$
✓
Answer
Correct option: B.
${A_2}{B_3}$
(b) Valency of $A$ is $3$ while that of $B$ is $2$
so according to Criss Cross rule the formula of the compound between these two will be ${A_2}{B_3}$.
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
Strongest reducing agent is
The common features among the species $C{N^ - }$, $CO$ and $N{O^ + }$ are
→Which of the following is the best example to demonstrate the law of conservation of mass?
Which of the following bromides is the major product of the reaction shown below, assuming that there are no carbocation rearrangement ?
$CH_3 - CHCl - CH_2 - CH_3$ has a chiral centre. Which one of the following represents its $R-$configuration ?
→When petroleum is heated the vapours contain mainly
If the uncertainty in velocity and position of a minute particle in space are, $2.4 \times 10^{-26}\left(\, m\,s ^{-1}\right)$ and $10^{-7}\,( m )$ respectively. The mass of the particle in $g$ is $....$ (Nearest integer)
→(Given : $h =6.626 \times 10^{-34} Js$ )
In the thermal decomposition of potassium chlorate given as ,
→$2K\,Cl{O_3}\xrightarrow{{}}2KCl + 3{O_2}$ law of mass action
Which of the following reaction satisfy following conditions?
→$(a)$ Heat of combustion reaction
$(b)$ Heat of formation reaction
$(c)$ An exothermic reaction
$(d)$ Not neutralization reaction
The orbital having two radial as well as two angular nodes is