Why Petrol & Gold Prices Change — Commodities Explained
Crude oil, gold, currencies and trade decide the prices around you. A clear Class 10–12 explainer on commodities, exchange rates, and why your petrol bill moves.
TL;DR: Crude oil, gold, currencies and trade decide the prices around you. A clear Class 10–12 explainer on commodities, exchange rates, and why your petrol…
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
What are Commodities?
Commodities are basic raw things that people buy and sell in large amounts — like gold, silver, crude oil, wheat, and cotton.\n\nUnlike a phone brand, one unit of gold is the same as another, so its price is set by global demand and supply. These are traded on commodity markets every day.
Why Petrol Prices Change
India imports most of its crude oil from other countries. Petrol is made from crude oil.\n\nThree things move petrol prices:\n\n1. Global crude price — if world demand rises or OPEC countries cut supply, crude gets costlier.\n2. Rupee vs Dollar — oil is bought in US dollars. If ₹ weakens (say $1 = ₹85 instead of ₹80), the same oil costs more rupees.\n3. Taxes — central and state taxes add a big part of the final pump price.
Why People Buy Gold
In India, gold is both jewellery and savings. It's called a safe haven — when stock markets fall or there's uncertainty, many people buy gold, so its price often rises.\n\nGold protects against inflation too: as money slowly loses value over years, gold tends to hold its worth.
Currencies & Trade
An exchange rate tells how much one currency is worth in another. If $1 = ₹83, a $10 imported toy costs ₹830.\n\nCountries export what they make well (India exports software, textiles) and import what they need (oil, electronics). When imports cost more than exports, it's called a trade deficit — and it can weaken the currency, which then raises import prices like petrol.
Frequently Asked Questions
Why is petrol cheaper in some countries?
Mainly because of lower taxes and/or local oil production. India imports most oil and adds significant taxes, so pump prices are higher.
Is gold a good investment?
Gold is considered safer and protects against inflation, but it does not always grow fast like good stocks. Most experts suggest holding a small portion in gold for balance.
What is OPEC?
OPEC is a group of major oil-producing countries that together decide how much oil to supply — which strongly affects global crude prices.