61 Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________? Chemistry Medium Full question → A 6 B 8 C 10 D 4
62 A solution can be both____________________? Chemistry Medium Full question → A dilute and concentrated B dilute and saturated C saturated and unsaturated D saturated and super saturated
63 The unit of molality is__________________? Chemistry Medium Full question → A moles dm-3 B moles kg-1 C gram dm-3 D none
64 Solubility of CaF2 is 2.0×10-4 gdm-3 then Ksp of CaF2 is_______________? Chemistry Medium Full question → A 4.0 x 10-8 B 3.2 x 10-11 C 2.0 x 10-8 D 4.0 x 10-12
65 Which of the following points are important in connection with equilibrium constant ? Chemistry Medium Full question → A Kc is constant at given temperature B Kc is unaffected by change in concentration of reactants or products C Kc indicates the extent of reaction but not about the rate of reaction. D All of the above
66 Which of the following molecule is polar__________________? Chemistry Medium Full question → A CCI4 B CO2 C BF3 D none of the above
67 Which of the following elements has greater 1st ionization energy__________________? Chemistry Medium Full question → A B B C C N D O
68 Which catalyst is used in contact process ? Chemistry Medium Full question → A Fe2O3 B V2O5 C SO3 D Ag2O
69 What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ? Chemistry Medium Full question → A 6 B 4 C 3 D 2
70 On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________? Chemistry Medium Full question → A pink B black C yellow D brick red
71 Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ? Chemistry Medium Full question → A aluminium can be recycled B aluminium has very low density C aluminium is the most abundant metal in the earth crust D aluminium is resistant to corrosion by organic acids.
72 In solids the temperature is the measure of__________________? Chemistry Medium Full question → A Average kinetic energy of molecules B Vibrational kinetic energy C Translational kinetic energy D None of the above
73 All the transition elements show_________________? Chemistry Medium Full question → A Similar physical properties B Similar chemical properties C Both A and b D None
74 Purines and pyrimidines are_________________? Chemistry Medium Full question → A Enzymes B Nitrogenous bases C Carbohydrates D Lipids
75 Which of the following element doesnot show allotropy_________________? Chemistry Medium Full question → A Carbon B Arsenic C Nitrogen D Sulphur
76 Benzene is a good solvent for__________________? Chemistry Medium Full question → A fats B resins C iodine D all the above
77 If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________? Chemistry Medium Full question → A 0?C B 273.16K C ?273.16 K D ?273.16?C
78 When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ? Chemistry Medium Full question → A phenol is unsaturated B 2-bromophenol is insoluble in water C a hydroxy group makes the benzene ring more susceptible to electrophilic attack D acid-base reaction
79 The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent ? Chemistry Medium Full question → A alkaline aquenous iodine B aqueous bromine C Fehling solution D aqueous NaOH
80 In the van der Waals equation (P + n2a / v2) (v – nb) = nRT which of the following statement is not true ? Chemistry Medium Full question → A n2a/v correct for the intermolecular forces. B nb correct for the volume occupied by gas molecules. C at high densities the equation reduces to the ideal gas law D all of the above statements are correct.