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Which one of the following belongs to representative group of elements in the periodic table?

1. Lanthanum
2. Tungston
3. Chromium
4. Aluminium

Correct answer: Aluminium

Solution

Aluminium is a main-group (representative) element because it lies in the p-block of the periodic table. Lanthanum is an inner-transition element, while tungsten and chromium are transition metals.

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