Q3 / 150 · MHT CET 2026 (18 April Shift 2) · Chemistry
What is the general formula of halide salts of alkali metals if M is a metal atom ?
- Correct answerA$\text{MX}$
- B$\text{MX}_2$
- C$\text{M}_3\text{X}_2$
- D$\text{M}_2\text{X}_3$
Solution
Alkali metals belong to Group 1 of the periodic table and have one valence electron. They lose this electron to form a unipositive ion, $M^{+}$.
Halogens belong to Group 17 and have seven valence electrons. They gain one electron to form a uninegative ion, $X^{-}$.
To form a neutral salt, one $M^{+}$ ion combines with one $X^{-}$ ion.
The general formula of halide salts of alkali metals is $MX$.
Answer: $\text{MX}$
Halogens belong to Group 17 and have seven valence electrons. They gain one electron to form a uninegative ion, $X^{-}$.
To form a neutral salt, one $M^{+}$ ion combines with one $X^{-}$ ion.
The general formula of halide salts of alkali metals is $MX$.
Answer: $\text{MX}$
Hence, the correct answer is option: 'A'.