Consider the following pairs : Commonly used / consumed materials Unwanted or controversial chemicals likely to be found in them 1. Lipstick - Lead 2. Soft drinks - Brominated vegetable oils 3. Chinese fast food - Monosodium glutamate Which of the pairs given above is/are correctly matched ?

This snippet lists 'hair dye products' among consumer products that can contain lead, implying that personal-care/color products may be a route for lead presence.

A student could note that lipsticks are colored cosmetics like hair dyes and thus check whether cosmetic pigments or dye ingredients commonly contain lead or are contaminated by it.

Describes lead use in 'glass making' and in industries producing colored materials, indicating lead compounds are used in manufacturing colored/finished goods.

One could extend this to consider whether colorants or pigment manufacturing processes used for lipstick could introduce lead contamination.

Lists lead's widespread industrial uses (paints, glass, alloys), showing lead is broadly used in materials that provide color or finish.

A student might infer that any product whose color comes from industrial pigments (including cosmetics) could plausibly be a source of lead unless regulated.

Explains that lead remains in consumer products (paints) in places without bans, illustrating that lack of regulation can leave lead in everyday goods.

Combine this with knowledge of regulatory differences: if a country hasn’t banned lead in certain uses, imported or locally made cosmetics could contain lead contaminants.

Shows lead appears in unexpected consumer-product components (glass panels, solder in electronics), highlighting that lead can be present in diverse manufactured items.

This supports checking non-obvious pathways (packaging, manufacturing equipment, pigment sources) by which lipsticks might acquire trace lead.