Chemistry - Complete s-block Question with Solution | TestHub

Question Explanation: Counts the number of elements correctly matched to their flame colour.

Concept: Flame Test in s-Block Elements.

Solution: Alkali and alkaline earth metals impart characteristic colours to a flame due to electronic excitation. Beryllium and Magnesium do not give a flame test because their electrons are too strongly bound. Strontium gives crimson red, not apple green (which is Barium).

Correct matches: K (Violet), Na (Yellow), Ca (Brick red), Mg (No colour), Li (Crimson red). Total = 5.

Final Answer: 5