SSC CGL Chemistry · Free notes

Chemistry in Everyday Life: SSC CGL Chemistry

Chemistry in Everyday Life has 14 questions in the SSC CGL Tier I bank: 11 from the 2023 shifts and three from the 2024 shifts, and none from the 2025 shifts. Each names a use, such as a preservative, a flavour or a gas in a sign, and asks the chemical behind it. One page gives the pairs, in food first and then in wider use.

The handout has every subtopic, worked example, formula and trap with answers shown. The formula sheet is the chapter’s formulas and traps alone, on one page.

SSC CGL home

Subtopic notes

Chemicals in Food and Daily Use
14 PYQs
Preservatives, flavours and colours in food with the chemical behind each, food tests and adulterants, and gases and chemicals used in labs, signs, hospitals and medicine.

Formula & revision sheet

0 formulas · 2 reference tables · 2 gotchas across all subtopics — the exam-eve cheat-sheet

Chemicals in Food and Daily Use

Reference tables (2)

Chemistry in the kitchen6 rows

Use or feature	Chemical
Stops browning	SulphitesQ
Almond flavour	BenzaldehydeQ
Main acid of olive oil	Oleic acidQ
Garlic smell	Sulphur compoundsQ
Test for starch	IodineQ
Beetroot colour	BetaninQ

Gases and chemicals in use4 rows

Chemical	Known for
Neon	Red glow in signsQ
Sulphur hexafluoride	Most potent greenhouse gasQ
Trichloromethane	ChloroformQ
Drug classification	Effect, action, structure, targetQ

Watch out for (2)

Benzoate keeps, bicarbonate raises
→ Chemistry in the kitchen
SF6, not hydrogen fluoride
→ Gases and chemicals in use

PYQ weightage by concept

2 concepts · 14 PYQs — where the marks actually sit, so you know what to drill first

Chemicals in Food and Daily Use14 PYQs · 100%

Concept	PYQs	Share
Chemistry in the kitchen	9	64%
Gases and chemicals in use	5	36%

Test yourself on a real paper

Sit a past SSC CGL paper, timed and marked the way the exam marks it. You see your score and every answer the moment you finish. Free to start.

Sit an SSC CGL past paper