Carbon: Covalent Bonding, Catenation and Allotropes 7 PYQs

• When carbon dioxide is passed through lime water, which colour precipitate is obtained?SSC MTS 2026 · 20 Feb 2026
• How many neutrons are present in Carbon-14?Delhi Police 2026 · 09 Jan 2026
• Which of the following statements correctly describes the unique properties and potential applications of Carbon Nanotubes (CNTs) in advanced…SSC Stenographer 2026 · 10 Sep 2026
• In graphite, each carbon atom is directly bonded to how many other carbon atoms?DSSSB 2026 · 01 Oct 2026
• How many carbon atoms are found in each molecule of ethyl alcohol (ethanol)?DSSSB 2026 · 07 Oct 2026
• The remarkable ability of carbon to form a vast number of compounds is mainly due to which combination of properties?DSSSB 2026 · 14 Oct 2026
• Why do covalent compounds generally have low melting and boiling points?SSC JE 2025 · 22 Apr 2025

Hydrocarbons: Alkanes, Alkenes and Alkynes 1 PYQs

• Which chemical process converts liquid vegetable oils into solid fats (vanaspati ghee)?DSSSB 2026 · 09 Oct 2026

Homologous Series, Functional Groups, Nomenclature and Isomerism 5 PYQs

• What functional group is present in both aldehydes and ketones?DSSSB 2026 · 05 Oct 2026
• What functional group is introduced when a hydrocarbon becomes an alcohol?DSSSB 2026 · 05 Oct 2026
• What is the chemical notation for the carbonyl group found in organic compounds?DSSSB 2026 · 15 Oct 2026
• What is the phenomenon called when two or more compounds with the same molecular formula show different physical or chemical properties?Other exams 2025 · 12 Mar 2025
• Which functional groups of amino acids are directly involved in forming a peptide bond?RRB NTPC 2025 · 06 Jun 2025

Ethanol, Ethanoic Acid, Esters and Other Important Carbon Compounds 1 PYQs

• Ester used as medicine is:Delhi Police 2026 · 20 Jan 2026

Soaps and Detergents: Saponification, Micelles and Hard Water 2 PYQs

• In many cities, hard water containing calcium and magnesium ions is common. Under such conditions, detergents often outperform soaps. Which…Delhi Police 2026 · 20 Jan 2026
• Many personal-care products such as shampoos and toothpastes contain surface-active agents that help in foaming and cleansing. Sodium lauryl…Delhi Police 2026 · 20 Jan 2026

Polymers and Plastics 1 PYQs

• How many carbon atoms are present in one molecule of glucose?SSC MTS 2026 · 17 Feb 2026

Fuels, Petroleum and Calorific Value 5 PYQs

• Which of the following is crop is primarily used in the production of Ethanol?SSC MTS 2026 · 18 Feb 2026
• Which of the following is the use of kerosene, a constituent of petroleum? I. Fuel for stoves II. Fuel for lampsSSC MTS 2026 · 16 Feb 2026
• Which of the following is a constituent of petroleum? I. Diesel II. Paraffin waxSSC MTS 2026 · 18 Feb 2026
• Which of the following gas is used as fuels in vehicles these days?SSC MTS 2026 · 09 Feb 2026
• Read the below statements regarding "Ethanol 100": Statement 1: Ethanol 100, launched by the Ministry of Petroleum and Natural Gas, is a cleaner…Delhi Police 2026 · 08 Jan 2026