MCQ
Of the following the formula which represents a saturated cyclic compound is
- ✓${C_3}{H_6}$
- B${C_3}{H_8}$
- C${C_8}{H_{10}}$
- D${C_8}{H_{12}}$

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$L(1s^2, 2s^2 2p^4); Q(1s^2, 2s^2 2p^6, 3s^2 3p^5)$
$P(1s^2, 2s^2 2p^6, 3s^1); R(1s^2, 2s^2 2p^6, 3s^2)$
The formulae of ionic compounds that can be formed between these elements are

(Given : Atomic Number: F :9, $Cl : 17, Na =11$, $Mg =12, Al =13, K =19, Ca =20, Sc =21$ )