Punjab Public Service Commission — Complete MCQ Bank
PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.
Which element is essential for the structure of DNA and RNA molecules alongside carbon hydrogen oxygen and nitrogen?
What is the process by which plants use carbon dioxide and water to make glucose using sunlight?
Which noble gas is used in glowing advertising signs giving a reddish-orange colour?
What is the chemical formula for ozone, the molecule that forms the protective layer in the stratosphere?
Which gas is responsible for the distinctive smell of rotten eggs?
What is the chemical name for baking soda commonly used in cooking?
What is the chemical formula for ethanol the type of alcohol found in beverages?
Which chemical process is used to extract metals from their ores using carbon or electrolysis?
What is the chemical formula for rust formed on iron?
Which type of chemical bond exists between water molecules causing its unusually high boiling point?