721 For determining the order of reaction we use__________________? Chemistry Medium Full question → A Refractometric method B Dilatometric method C Optical activity method D Half life method
723 Co-enzymes are_________________? Chemistry Medium Full question → A Non proteineous B Proteineous C sugars D lipids
724 A catalyst can not effect__________________? Chemistry Medium Full question → A Products B Chemical equilibrium C Reactants D both A & B
725 Each catalyst has_________________? Chemistry Medium Full question → A Specificity B Special structure C Its own Ea D all of above
726 The substances that reduces the effectiveness of a catalyst are called ___________________? Chemistry Medium Full question → A Promoters B Poisoning catalysts C Inhibitors D pro-catalysts
727 Greater the conc. Of reactant__________________? Chemistry Medium Full question → A Greater will be dx/dt B Lesser will be dx/dt C dx/dt will be moderate D any of above
728 Energy required to form transition state is called _________________? Chemistry Medium Full question → A Ea B P.E C V D K.E
729 Activated complex is formed due to________________? Chemistry Medium Full question → A Pressure B Effective collision C Ineffective collisions D Temperature
730 Which order of reaction obeys the relation t1/2 = 1/Ka____________________? Chemistry Medium Full question → A First order B Second order C Third order D Zero order
731 Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________? Chemistry Medium Full question → A Nylon 66 B urotropine C Aniline formaldehyde plastic D Bakelite
732 Which of the following is not a use of acetaldehyde ? Chemistry Medium Full question → A formation of phenolic resins B formation of mirror C antiseptic inhalant D formation of throat lozenges
733 Which of the following is not a use of formaldehyde ? Chemistry Medium Full question → A in silvery mirror B in making medicine urotropine C in making throat lozenges D in making acetic acid
734 Ketones are comparatively less reactive than aldehdye. It is due to_______________? Chemistry Medium Full question → A alkyl groups are electron donating B steric hindrance C Both A and B D none
735 Cannizzaros reaction is not given by__________________? Chemistry Medium Full question → A formaldehyde B acetaldehyde C benzaldehyde D trimethyl acetaldehyde
736 Which of the following compounds will react with Tollens reagent ? Chemistry Medium Full question → A CH3-CHO B CH3-CH-CH3 C CH3-COOH D CH3-CO-CH2-CH3
737 Which of the following substances does not give iodoform test ? Chemistry Medium Full question → A acetaldehyde B ethyl alcohol C methyl alcohol D acetone
738 Which of the following reaction is not shown by ketones ? Chemistry Medium Full question → A reaction with HCN B reaction with NaHSO3 C reaction with 2 4 dinitrophenyl hydrazine D reaction with Fehling solution
739 Which of the following aldehydes shows rapid reaction with sodium nitroprusside ? Chemistry Medium Full question → A formaldehyde B accetaldehyde C benzaldehyde D acetone
740 Which of the following substances does not give iodoform test ? Chemistry Medium Full question → A acetaldehyde B ethyl alcohol C methyl alcohol D acetone