answer chemistry

1 : In the manufacture of nitric acid by ostwald,s process, the catalyst used are
»you didn't select an answer. The answer is :Pt-Rn gauze

2 : The reaction 2N2O5 <--> 4NO2 + O2 follows Ioder kinetics. Hence the molecularity of reaction is
»you didn't select an answer. The answer is :none of these.

3 : Potassium crystallizes in a body centered lattice Hence the coordination number of potassium in potassium metal is
»you didn't select an answer. The answer is :8

4 : Which one of the following does not conduct electricity
»you didn't select an answer. The answer is :solid NaCl

5 : A metal rod is dipped in a solution of its ions. Its electrode potential is independent of
»you didn't select an answer. The answer is :area of metal exposed

6 : Phosphorous occurs as
»you didn't select an answer. The answer is :phosphate.

7 : NaCN is used in the extraction of
»you didn't select an answer. The answer is :gold.

8 : When Reactivity of Halogen atom is minimum in
»you didn't select an answer. The answer is :propyl chloride

9 : Given that Zn + ½ O2 --> ZnO + 35.28 kj HgO --> Hg + ½ O2 - 9.11 kj so the heat of reaction Zn + HgO --> ZnO + Hg is
»you didn't select an answer. The answer is :44.39 kj

10 : The most convinient method to remove a phenolic group from a compound is to
»you didn't select an answer. The answer is :disfill it with Zn dust

11 : The number of ions formed when cuprammonium sulphate dissolves in water is
»you didn't select an answer. The answer is :two

12 : Among the following : NaOH, Ca(OH)2, KOH and Zn(OH)2 The weakest base is
»you didn't select an answer. The answer is :Zn(OH)2

13 : In Pyrophosphoric acid the number of hydroxyl group present are
»you didn't select an answer. The answer is :4

14 : Among the following the compound that decolourises alkaline kMnO4 is
»you didn't select an answer. The answer is :C2H4

15 : Identify the element which can have highest oxidation number
»you didn't select an answer. The answer is :Cl

16 : Metal halide which is insoluble in water
»you didn't select an answer. The answer is :AgI

17 : Among the following, the compounds nitrobenzene, benzene, aniline and phenol the strongest basic behaviour in acid medium exhibited by
»you didn't select an answer. The answer is :phenol

18 : Phenol is most easily soluble in
»you didn't select an answer. The answer is :sodium hydroxide solution

19 : The oils tend to be liquids at room temperature, if they contain more of
»you didn't select an answer. The answer is :unsaturated fatty acids

20 : The conversion of A-->B follows a third order kinetics.Doubling the one of A will increse the rate of formation of B by a factor of
»you didn't select an answer. The answer is :8

21 : Which one of the following chars when warmed with concentrated sulphuric acid
»you didn't select an answer. The answer is :carbohydrate

22 : Which one pof the following bimolecules contain a non-transition metal ion
»you didn't select an answer. The answer is :chlorophyll

23 : Volume of 0.6M NaoH is required to netralise 30cm3 of 0.4M HCl is
»you didn't select an answer. The answer is :20 cm3

24 : Among the halogens as you go from F to I, the electron affinity
»you didn't select an answer. The answer is :fluctuates

25 : Turuball's blue is
»you didn't select an answer. The answer is :Fe2 [Fe (CN)6 ]3

26 : Hydrolysis of benzonitrile by dilute HCl yields
»you didn't select an answer. The answer is :benzoic acid

27 : Acetone is soluable in water due to
»you didn't select an answer. The answer is :hydrogen bonding

28 : The soluability product of silver chloride is 1.8x10-10 at 298 k. The soluability of AgCl in 0.01m HCl solution in more cm-3 is
»you didn't select an answer. The answer is :3.6x10-8

29 : The percentage s-character of the hybrid orbitals in methane, ethene and ethyne respectively
»you didn't select an answer. The answer is :25, 33, 50

30 : An aqueous solution of colourless metal sulphate M gives a white precipitate with NH4OH. This was soluble in excess of NH4OH. On passing H2S through this solution a white precipitate is formed. The metal in matal salt is
»you didn't select an answer. The answer is :zinc

31 : There is a very little difference in acid strength in the series H3PO4, H3PO3 and H3PO2 because
»you didn't select an answer. The answer is :phosphorous in these acids exists in different oxidation states

32 : Formaldehyde and acetaldehyde are manufactured by dehydrogenation of methanol and ethanol respectively. The catalyst used in this reaction is
»you didn't select an answer. The answer is :Copper

33 : Copper is below iron and above silver in the electrochemical series. So, we can expect that
»you didn't select an answer. The answer is :copper displaces silver from silver nitrate solution

34 : Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is known as
»you didn't select an answer. The answer is :Williamson's reaction

35 : Dry ammonia was passed over heated copper oxide. The resulting gases were passed through anhydrous calcium chloride and then collected over mercury. If the gain in weight of calcium chloride is 0.06gm, the volume of gas collected at STP is about
»you answered : , which is correct

36 : Glycerol was distilled with qxalic acid and products were led into fehling's solution and warmed. Cuprous oxide was precipitated it is due to
»you didn't select an answer. The answer is :HCOOH

37 : A mixture of two organic chlorine compounds was treated with sodium metal in ether solution. Isabutane was obtained as a product. The two chlorine compounds are
»you didn't select an answer. The answer is :methyl chloride and propyl chloride

38 : A disaceharides made up of two units of same monosaceharide is
»you didn't select an answer. The answer is :lactose

39 : Drying oils are so called because they are
»you didn't select an answer. The answer is :highly unsaturated and so undergo atmosphere oxidation to yield resinous residue

40 : The -OH group of methyl alchohol can't be replaced by chlorine by by the action of
»you didn't select an answer. The answer is :chlorine

41 : Toluene can be oxidized to benzaldehyde using
»you didn't select an answer. The answer is :Etard's reaction

42 : Heating a mixture of calcium formate and calcium acetate produces
»you didn't select an answer. The answer is :acetaldehyde

43 : Which of the following nitrogeneous fertilizers contain more nitrogen
»you didn't select an answer. The answer is :urea

44 : Inert gases except helium belong to
»you didn't select an answer. The answer is :P-block

45 : Iodine difficiency in diet is known to cause
»you didn't select an answer. The answer is :goiter

46 : The temperature at which RMS velocity of methane be equal to that sulpur dioxide at 300k
»you didn't select an answer. The answer is :75k

47 : Elements of which group from anions most rapidly
»you didn't select an answer. The answer is :halogens

48 : A metal oxide contains 40% by mass of oxygen. Its equivalent weight is
»you didn't select an answer. The answer is :12

49 : 9 gms of a trivalent metal contains with 35.5 g of chlorine. The atomic weight of metal is
»you didn't select an answer. The answer is :12

50 : The hydrogen atoms in acetylene are
»you didn't select an answer. The answer is :acidic

51 : The IUPAC name of compound having the formula
»you didn't select an answer. The answer is :3,3 dimethyle-1-1butene

52 : Equillibrium constant of 2HI<--->H2+I2 at 25° C is 100. The equilibrium constant of 1/2H2+ 1/2I 2<--->HI at the same temperature is
»you didn't select an answer. The answer is :0.1

53 : A carboxylic acid is reacted with slacked line. The product formed on dry distillation gave a compound with formula C6H5COC6H5 . The acid A should be
»you didn't select an answer. The answer is :benzoic acid

54 : Name the end product in the series
CH3COOH A BC
»you didn't select an answer. The answer is :CH3CN

55 : Our body converts all digestible carbohydrates into glucose which then undergoes oxidation and supplies energy to us. To store surplus glucose
»you didn't select an answer. The answer is :the pancreas converts it into glycogen

56 : Chlorobenzene is
»you didn't select an answer. The answer is :less reactive than benzyl chloride

57 : A 0.01M ammonia solution is 5% ionized. The concentration of
OH---- ions is
»you didn't select an answer. The answer is :0.0005M

58 : The relative strengths of hydrosalic acids are in the order :
»you didn't select an answer. The answer is :HI > HCl > HBr

59 : 2g of aluminium is treated separately with excess of dilute H2SO4 and excess of NaOH. The ratio of volumes of hydrogen evolved is :
»you didn't select an answer. The answer is :1:1

60 : In the ostwalld's process, ammonia is oxidized using gaseous oxygen.The final product of oxidation is nitric acid. The first product of oxidation of ammonia is
»you didn't select an answer. The answer is :nitric oxide