MODEL SET 5 ENGLISH 3 Created on July 31, 2023 By Arvind SirMODEL SET 5 ENGLISH 1 / 28On warming an aqueous solution of benzene diazonium chloride, the product obtained is- Benzene Aniline Phenol Amide 2 / 28      Penicillin is- Harmone Analgesics Antibiotic Antibody 3 / 28     Which of the following bases is present in RNA only? Adenine Guanine Uracil Thymine 4 / 28     Which of the following has ester linkage? Nylon PVC Terylene Bakelite 5 / 28The order of dehydration of alcohol is- 1°>2° >3° 1° > 2° < 3° 1° 3° 1°< 2°<3° 6 / 28      Which of the following is stable carbocation ? +CH3 R +CH₂ R2 +CH R3 +C 7 / 28The compound in which the distrce between tow adjacent carbon atoms is the largest is- Ethane Ethene Ethyne Benzene 8 / 28      The number of sigma and pi-bonds in 1-butene-3-yne are- 5 sigma and 5 pi 7 sigma and 3 pi 8 sigma and 2 pi 6 sigma and 4 pi 9 / 28       Which of the following is a double salt? [Cu(NH3)4]SO4 Cu[CdCl4] K₂SO4 Al₂(SO4)3.24H₂O K4[Fe(CN)6] 10 / 28Vitamin B12 is a complex of - Co²+ co³+ Cr²+ Cr³+ 11 / 28Which of the following inort gases has the largest  abundance (by volume) in air. Hiliumn Neon Argon Krypton 12 / 28      The highest oxidation state of Cr is- +4 +5 +6 +7 13 / 28Which of the following has the lowest boiling point ? H₂O H₂S H₂Se H₂Te 14 / 28The gas liberated when copper reacts with dilute HNO3 is- NO NO2 N2O3 N2O5 15 / 28  Ammonia acts as a- Neutral species Lewis acid Lewis base Amphoteric hydride 16 / 28Hardness of water is due to - Ca2+ & Mg 2+ HCO3- Na+ K+ 17 / 28Which of the following is known as Indian Saltpetre ? LiNO3 NaNO3 KNO3 RbNO3 18 / 28In the electrolysis of alumina, cryolite is added to- Lower the m.p. of alumina Decreases the electrical conductivity Minimise the anode effect Remove impurities from alumina 19 / 28 Physical  adsorption - Involues weak interaction between adsorbent . and adsorbate Involves chemical interaction between adsorbent and adsorbate is irreversible in nature Increases with increase in temperature 20 / 28The colloidal particles have diameter ranging from- 1 to 100 nm 1 to 100 pm 1 to 100 mm 1 to 100 pm 21 / 28A catalyst is a substance which - Increases the equilibrium concentration of the products Decreases the energy of activation Does not alter the reaction mechanism Increases the frequency of collision of reacting species 22 / 28    The half  life of a first order reaction A→B, is given as - t1/2 = 0.693 K t1/2 = 0.693 In K t1/2 = 0.693/K t1/2 = log2 / K 23 / 28Which of the following metals form a protective layer of oxide to prvent corrosion ? Cu Ag Au Al 24 / 28Which of the following expression is true ? I= Qt I=Q/t I = 1 / Qt I = t/Q 25 / 28What mass of ethanol is added to 1.0 kg water to have the mole fraction of ethanol equal to 0.25 ? 63.89 gm 6.39 gm 638.89 gm 683.89 gm 26 / 28The relative lowering of V. P. of solute is proportional to- Mole fraction of solute Mole fraction of solvent Molality of the solvent Normality of solution 27 / 28The fraction of volume occupied in a body centred cubic unit cell is- 0.32 0.68 0.35 0.65 28 / 28Which is the structure of graphite Tetrahedral Octahedral Hexagonal Cubic Your score isThe average score is 51% LinkedIn Facebook VKontakte 0% Restart quiz
