This page covers AFCAT Chemistry in Everyday Life with complete concept notes, 16 graded practice MCQs, key points and exam-specific tips. Free to study.
Which of the following is the main active ingredient in common antacids used to neutralize stomach acid?
Practice 2easy
What is the primary chemical compound responsible for the bleaching action in household bleach?
Practice 3easy
Which chemical compound is commonly used as a preservative in food items like jams and pickles?
Practice 4easy
What is the chemical formula of the compound used in LPG (Liquefied Petroleum Gas) that is odorless and requires an odorant for safety?
Practice 5easy
Which of the following is the active disinfectant in antiseptic solutions used for wound cleaning?
Practice 6medium
Which chemical compound is commonly used as a preservative in food items to prevent bacterial growth?
Practice 7medium
Baking soda (sodium bicarbonate) releases carbon dioxide gas when heated. Which equation represents this thermal decomposition?
Practice 8medium
Which chemical is used in toothpaste to prevent tooth decay by strengthening tooth enamel?
Practice 9medium
What is the primary purpose of using antacids like calcium carbonate in everyday life?
Practice 10medium
Which compound is added to water in swimming pools to disinfect and kill harmful microorganisms?
Practice 11medium
Vinegar (acetic acid, CH₃COOH) is used for cleaning household surfaces. What is the chemical basis for its cleaning action?
Practice 12medium
Which substance is commonly used as a desiccant (drying agent) in packaging to keep products dry and prevent moisture damage?
Practice 13medium
Aspirin (acetylsalicylic acid) works as a pain reliever and anti-inflammatory agent. Which functional group in its structure is primarily responsible for its acidic properties?
Practice 14hard
Hard water contains dissolved calcium and magnesium ions. When soap is added to hard water, a white precipitate forms instead of lather. Which chemical reaction explains this phenomenon?
Practice 15hard
Bleaching powder is widely used for disinfection of drinking water in India. If bleaching powder contains Ca(OCl)₂ as the active ingredient and 0.5 kg of bleaching powder is used to disinfect 1000 liters of water, what is the approximate concentration of hypochlorous acid (assuming 35% purity of Ca(OCl)₂ in bleaching powder)?
Practice 16hard
In the preparation of common salt (NaCl) by the Solvay process, ammonia plays a crucial role. Which of the following best describes why ammonia is essential in this industrial process used in everyday salt production?