Practice Questions

Q49.Vulcanization of rubber is carried out by heating a mixture of (1) isoprene and styrene (2) neoprene and sulphur (3) isoprene and sulphur (4) neoprene and styrene

Q49.Stearic acid and polyethylene glycol react to form which one of the following soap/s detergents? (1) Cationic detergent (2) Soap (3) Anionic detergent (4) Non-ionic detergent

Q49.The structure of Tagamet (Cimetidine) is: (1) (2) (3) (4)

Q49.Which of the following is NOT an example of synthetic detergent? (1) (2) CH3 −(CH2)16 −COO−Na+ (3) (4) CH3 (CH2)16 COO (CH2 CH2 O)n CH2 CH2 OH

Q49.A chemical which stimulates the secretion of pepsin is (1) Histamine (2) Cimetidine (3) Zantac (4) Anti histamine

Q49.Some drugs bind to a site other than, the active site of an enzyme. This site is known as (1) non-active site (2) allosteric site (3) competitive site (4) therapeutic site

Q49.Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because (1) soap particles remain floating in water as ions. (2) colloidal structure of soap in water is completely disturbed. (3) the hydrophobic part of soap is not able to take (4) the micelles are not formed due to concentration away grease. of soap, below its CMC value.

Q49.Which of the following is NOT a natural polymer? (1) Protein (2) Starch (3) Rubber (4) Rayon

Q49.Drugs used to bind to receptors, inhibiting its natural function and blocking a message are called (1) antagonists. (2) agonists. (3) allosteric. (4) lead compounds.

Q49.Which one of the following is NOT a copolymer? (1) Neoprene (2) PHBV (3) Buna- S (4) Butadiene-styrene JEE Main 2022 (28 Jun Shift 1) JEE Main Previous Year Paper

Q49.The structure shown below is of which well-known drug molecule? (1) Codeine (2) Morphine (3) Ranitidine (4) Cimetidine

Q50.During the denaturation of proteins, which of these structures will remain intact ? (1) Primary (2) Secondary (3) Tertiary (4) Quarternary

Q50.Animal starch is the other name of (1) amylose (2) maltose (3) glycogen (4) amylopectin

Q50.In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present? JEE Main 2022 (24 Jun Shift 2) JEE Main Previous Year Paper (1) Calcium (2) Copper (3) Barium (4) Strontium

Q50.Which one of the following is an example of artificial sweetner? (1) Bithional (2) Alitame (3) Lactose (4) Salvarsan

Q50.Which of the following compounds is an example of hypnotic drug? (1) Seldane (2) Amytal (3) Aspartame (4) Prontosil

Q50.The structure of protein that is unaffected by heating is : (1) secondary structure (2) tertiary structure (3) primary structure (4) Quaternary structure

Q50.Stability of α - Helix structure of proteins depends upon (1) H -bonding interaction (2) dipolar interaction (3) van der Waals forces (4) π -stacking interaction

Q50.Sugar moiety in DNA and RNA molecules respectively are JEE Main 2022 (29 Jun Shift 1) JEE Main Previous Year Paper (1) β −D −2−deoxyribose, β −D−deoxyribose (2) β −D−ribose, β −D −2 deoxyribose (3) β −D −2−deoxyribose, β −D−ribose (4) β −Ddeoxyribose, β −D −2 deoxyribose

Q50.Which of the following is structure of a separating funnel? JEE Main 2022 (27 Jun Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q51.On complete combustion 0. 30 g of an organic compound gave 0. 20 g of carbon dioxide and 0. 10 g of water. The percentage of carbon in the given organic compound is____(Nearest Integer)

Q52.The moles of methane required to produce 81 g of water after complete combustion is____ ×10−2 mol. [nearest integer]

Q52.Consider the following set of quantum numbers. n l m1 A 3 3 −3 B 3 2 −2 C 2 1 +1 D 2 2 +2 JEE Main 2022 (27 Jun Shift 2) JEE Main Previous Year Paper The number of correct sets of quantum numbers is

Q52.When the excited electron of a H atom from n = 5 drops to the ground state, the maximum number of emission lines observed are

Q52.The hybridization of P exhibited in PF5 is spx dy . The value of y is Q53. 4. 0 L of an ideal gas is allowed to expand isothermally into vacuum until the total volume is 20 L. The amount of heat absorbed in this expansion is L atm.