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#	Question	Subject and topic	Difficulty
2201	Which method gives only primary aliphatic amines, free from 2° and 3° amines?	Chemistry Preparation and properties	Easy
2202	Which is the strongest base in aqueous solution?	Chemistry Preparation and properties	Medium
2203	What mass of methanamine (molar mass 31 g mol⁻¹) is formed from 5.9 g of ethanamide (molar mass 59 g mol⁻¹) b…	Chemistry Preparation and properties	Medium
2204	An amine reacts with benzenesulphonyl chloride to give a product that is insoluble in aqueous KOH. What kind …	Chemistry Preparation and properties	Hard
2205	At what temperature range is aniline usually diazotised?	Chemistry Diazonium salts	Easy
2206	Which reagent converts benzenediazonium chloride into iodobenzene?	Chemistry Diazonium salts	Easy
2207	Which product is formed when benzenediazonium chloride is treated with H₃PO₂?	Chemistry Diazonium salts	Medium
2208	What is formed when benzenediazonium chloride reacts with phenol in alkaline medium?	Chemistry Diazonium salts	Medium
2209	Which sequence is best for preparing fluorobenzene from aniline?	Chemistry Diazonium salts	Hard
2210	Which of these is a non-reducing sugar?	Chemistry Carbohydrates	Easy
2211	Which polysaccharide is called animal starch?	Chemistry Carbohydrates	Easy
2212	Prolonged heating of glucose with HI gives n-hexane. What does this show?	Chemistry Carbohydrates	Medium
2213	What is the molar mass of glucose pentaacetate, formed when all five –OH groups of glucose (180 g mol⁻¹) are …	Chemistry Carbohydrates	Medium
2214	34.2 g of sucrose (342 g mol⁻¹) is completely hydrolysed. What mass of glucose is formed?	Chemistry Carbohydrates	Hard
2215	Which amino acid is optically inactive?	Chemistry Amino acids and proteins	Easy
2216	How many peptide bonds are present in a pentapeptide?	Chemistry Amino acids and proteins	Easy
2217	Which level of protein structure is NOT affected when egg white is boiled?	Chemistry Amino acids and proteins	Medium
2218	How many different tripeptides can be made from glycine, alanine and valine if each is used exactly once?	Chemistry Amino acids and proteins	Medium
2219	What holds the α-helix of a protein in shape?	Chemistry Amino acids and proteins	Hard
2220	Most enzymes are chemically which type of substance?	Chemistry Enzymes	Easy
2221	Which enzyme hydrolyses maltose into glucose?	Chemistry Enzymes	Easy
2222	How does an enzyme increase the rate of a biochemical reaction?	Chemistry Enzymes	Medium
2223	Why does an enzyme stop working when it is heated strongly?	Chemistry Enzymes	Medium
2224	An enzyme acts on sucrose but not on lactose, though both are disaccharides. Which idea best explains this?	Chemistry Enzymes	Hard
2225	Deficiency of which vitamin causes scurvy?	Chemistry Vitamins	Easy
2226	Which set contains only fat-soluble vitamins?	Chemistry Vitamins	Easy
2227	Why must vitamin C be included in the diet regularly?	Chemistry Vitamins	Medium
2228	A patient's blood takes unusually long to clot. A deficiency of which vitamin is most likely?	Chemistry Vitamins	Medium
2229	Which pairing of vitamin and deficiency disease is correct?	Chemistry Vitamins	Hard
2230	Which base is found in RNA but not in DNA?	Chemistry Nucleic acids	Easy
2231	What is the difference between a nucleoside and a nucleotide?	Chemistry Nucleic acids	Easy
2232	A sample of double-stranded DNA contains 30% adenine. What percentage of guanine does it contain?	Chemistry Nucleic acids	Medium
2233	Which sugar is present in DNA?	Chemistry Nucleic acids	Medium
2234	Which statement about the DNA double helix is correct?	Chemistry Nucleic acids	Hard
2235	Chemically, insulin belongs to which class of hormones?	Chemistry Hormones	Easy
2236	Which hormone raises the level of glucose in the blood?	Chemistry Hormones	Easy
2237	Thyroxine is an iodinated derivative of which amino acid?	Chemistry Hormones	Medium
2238	Which group of hormones controls the excretion of water and salt by the kidney?	Chemistry Hormones	Medium
2239	In a region where people regularly use salt without added iodide, many develop an enlarged thyroid gland. Wha…	Chemistry Hormones	Hard
2240	A forest officer argues that a watershed forest must be protected because nearby towns depend on it for drink…	Environmental Studies Modern schools of ecological thought	Easy
2241	The “land ethic”, which judges actions by whether they protect the integrity and stability of the biotic comm…	Environmental Studies Modern schools of ecological thought	Medium
2242	Rachel Carson’s book Silent Spring (1962) mainly drew public attention to the harmful effects of:	Environmental Studies Modern schools of ecological thought	Easy
2243	Which view holds that whole ecosystems and species, not just individual organisms, have value in themselves?	Environmental Studies Modern schools of ecological thought	Medium
2244	A thinker who traces the ecological crisis mainly to social hierarchy and domination among humans belongs to …	Environmental Studies Modern schools of ecological thought	Hard
2245	The terms “deep ecology” and “shallow ecology” were introduced by:	Environmental Studies Deep and shallow ecology	Easy
2246	Which statement reflects shallow ecology rather than deep ecology?	Environmental Studies Deep and shallow ecology	Medium
2247	Gary Snyder, linked with deep ecology, is best known as a:	Environmental Studies Deep and shallow ecology	Easy
2248	Earth First!, founded in the USA in 1980, is best described as:	Environmental Studies Deep and shallow ecology	Medium
2249	According to deep ecology, humans may reduce the richness and diversity of life only to:	Environmental Studies Deep and shallow ecology	Hard
2250	The idea of “stewardship” of land means that people should:	Environmental Studies Stewardship of land	Easy