My Courses

Nuclear chemistry deals with A electron transfer reactions B chemical bonding C reactions involving atomic nucleus D molecular rearrangements Explanation Nuclear chemistry studies changes in the nucleus, not electrons. Radioactivity is the phenomenon of A loss of electrons B spontaneous emission of radiations C chemical decomposition D ionisation of atoms Explanation Unstable nuclei emit α,…

Metallurgy is the process of A studying metals B extracting metals from ores C purifying non-metals D alloy preparation only Explanation Metallurgy involves extraction, purification and processing of metals. Ores are A pure metals B naturally occurring minerals C minerals from which metals can be economically extracted D rocks containing only metals Explanation All ores…

d-Block elements are present in which groups A Group 1–2 B Group 13–18 C Group 3–12 D Group 17 only Explanation These elements have partially filled d-orbitals. d-Block elements are also called A noble gases B transition elements C metalloids D alkaline earth metals Explanation They show gradual change in properties. Which is NOT a…

s-Block elements are present in which groups of periodic table A Group 1 and 2 B Group 13 and 14 C Group 16 and 17 D Group 3 to 12 Explanation s-Block includes alkali and alkaline earth metals. Alkali metals belong to A Group 1 B Group 2 C Group 17 D Group 18 Explanation…

Which biomolecule primarily provides structural support in plants A starch B cellulose C glycogen D sucrose Explanation Cellulose forms plant cell walls and provides rigidity. Glycogen differs from starch because glycogen is A linear B less branched C highly branched D composed of fructose Explanation Glycogen has extensive branching for rapid energy release. Which linkage…

Polymers are A low molecular mass compounds B inorganic substances C high molecular mass macromolecules D simple hydrocarbons Explanation Polymers consist of repeating structural units. The repeating unit of a polymer is called A polymer B monomer C oligomer D macromolecule Explanation Monomers join to form polymers. Polymerisation is the process of A breaking polymers…

Natural products are organic compounds obtained from A petroleum sources B living organisms C synthetic laboratories D inorganic minerals Explanation Natural products are isolated from plants, animals, or microorganisms. Which of the following is a natural product A polyethylene B aspirin C morphine D PVC Explanation Morphine is obtained from opium poppy. Alkaloids are A…

Biomolecules are organic compounds essential for A industrial processes B laboratory reactions C life processes D combustion Explanation Biomolecules are fundamental to structure and function of living organisms. Which of the following is NOT a biomolecule A carbohydrates B proteins C polymers D nucleic acids Explanation Polymers are macromolecules but not all are biomolecules. Carbohydrates…

Amines are organic compounds derived from A ammonia B nitric acid C nitrous acid D nitriles Explanation Amines are formed by replacing hydrogen atoms of ammonia with alkyl/aryl groups. Primary amines have general formula A R₂NH B R₃N C RNH₂ D R₄N⁺ Explanation One alkyl group attached to nitrogen. Which is a secondary amine A…

Aldehydes and ketones contain which functional group A –COOH B –CHO C >C=O D –OH Explanation Both aldehydes and ketones contain the carbonyl group. Aldehydes differ from ketones because aldehydes have A two alkyl groups B one hydrogen attached to carbonyl carbon C aromatic ring D two hydrogen atoms Explanation Aldehydes have at least one…