Chemistry

1 In the manufacture of nitric acid by ostwald,s process, the catalyst used are
finely divided iron
Pt-Rn gauze
vanadium pantoxide
molybdenum
2 The reaction 2N2O5 <--> 4NO2 + O2 follows Ioder kinetics. Hence the molecularity of reaction is
unimoleqular.
pseudo unimoleqular
bimoleqular.
none of these.
3 Potassium crystallizes in a body centered lattice Hence the coordination number of potassium in potassium metal is
Zero
8
6
4
4 Which one of the following does not conduct electricity
fused NaCl.
solid NaCl
solid Chloride Solution
copper.
5 A metal rod is dipped in a solution of its ions. Its electrode potential is independent of
temperature of solutions.
concentration of solution
area of metal exposed
nature of metal
6 Phosphorous occurs as
phosphide.
phosphate.
oxides
element (free state).
7 NaCN is used in the extraction of
iron
copper
magnesium
gold.
8 When Reactivity of Halogen atom is minimum in
propyl oxide
propyl chloride
isopropyl chloride
isopropyl bromide
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
26.17 kj
44.39 kj
-44.39 kj
2.617 kj.
10 The most convinient method to remove a phenolic group from a compound is to
reduce it using Tin and HCl.
heat it strongly with Copper
reduce it strongly with SnCl2.
disfill it with Zn dust
11 The number of ions formed when cuprammonium sulphate dissolves in water is
one
two
four
zero
12 Among the following : NaOH, Ca(OH)2, KOH and Zn(OH)2 The weakest base is
NaOH
Ca(OH)2
KOH
Zn(OH)2
13 In Pyrophosphoric acid the number of hydroxyl group present are
4
3
5
7
14 Among the following the compound that decolourises alkaline kMnO4 is
C8H8
C2H4
CH4
CCl4
15 Identify the element which can have highest oxidation number
C
N
O
Cl
16 Metal halide which is insoluble in water
AgF
AgI
CaCl2
kBr
17 Among the following, the compounds nitrobenzene, benzene, aniline and phenol the strongest basic behaviour in acid medium exhibited by
phenol
aniline
nitrobenzyne
benzene
18 Phenol is most easily soluble in
sodium carbonate solution
sodium hydroxide solution
dilute HCl
both sodium hydroxide and dilute HCl
19 The oils tend to be liquids at room temperature, if they contain more of
glycerol
unsaturated fatty acids
saturated fatty acids
non-fatty impurities
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
6
1/6
8
1/8
21 Which one of the following chars when warmed with concentrated sulphuric acid
hydrocarbon
carbohydrate
protein
fat
22 Which one pof the following bimolecules contain a non-transition metal ion
vitamin B12
haemoglobin
chlorophyll
insulin
23 Volume of 0.6M NaoH is required to netralise 30cm3 of 0.4M HCl is
4.5 cm3
30 cm3
20 cm3
50 cm3
24 Among the halogens as you go from F to I, the electron affinity
increases
decreases
fluctuates
remains same
25 Turuball's blue is
Fe4 [Fe (CN)6 ]3
Fe4 [Fe (CN)6 ]
Fe2 [Fe (CN)6 ]3
Fe3 [Fe (CN)6 ]2
26 Hydrolysis of benzonitrile by dilute HCl yields
aniline
benzoldelyde
benzoic acid
benzaunide
27 Acetone is soluable in water due to
methyl group
neutral nature
dissociation in water
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
3.6x10-8
2.4x10-9
1.8x10-8
0.9x10-9
29 The percentage s-character of the hybrid orbitals in methane, ethene and ethyne respectively
10, 20, 40
50, 75, 100
25, 50, 75
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
alluminium
calcium
barium
zinc
31 There is a very little difference in acid strength in the series H3PO4, H3PO3 and H3PO2 because
phosphorous is not a highly electronegative element
hydrogens in these acids are not all bonded to phosphorous
phosphorous in these acids exists in different oxidation states
phosphorous oxides are less basic
32 Formaldehyde and acetaldehyde are manufactured by dehydrogenation of methanol and ethanol respectively. The catalyst used in this reaction is
concentrate H2SO4
Copper
nickel
chromium oxide
33 Copper is below iron and above silver in the electrochemical series. So, we can expect that
copper displaces silver from silver nitrate solution
copper displaces iron from ferrous sulphate solution
silver displaces copper from copper sulphate solution
silver displaces iron from ferrous sulphate solution
34 Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is known as
Reimer-Tiavam,s reaction
Williamson's reaction
Etard's reaction
Schotlen-Baumani'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
20m
125ml
30ml
35ml
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
CO
HCHO
CH3CHO
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
methyl chloride and propyl chloride
methyl chloride and ethyl chloride
isopropyl chloride and methyl chloride
isopropyl chloride and ethyl chloride
38 A disaceharides made up of two units of same monosaceharide is
mattose
sucrose
lactose
raffinose
39 Drying oils are so called because they are
volatile and so evaporate rapidly
hygrosopic and so absorb moisture from the surroundings
easily hydrolised by atmospheric moisture to give solid products
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
hydrogen chloride
phosphorous tri chloride
phosphorous penta chloride
chlorine
41 Toluene can be oxidized to benzaldehyde using
Willamson's reaction
Hoffman's reaction
Etard's reaction
Fittig's reaction
42 Heating a mixture of calcium formate and calcium acetate produces
acetone
ethyl alchohol
acetaldehyde
ethane
43 Which of the following nitrogeneous fertilizers contain more nitrogen
urea
(NH4)2 SO4
(NH4)3 PO4
CAN
44 Inert gases except helium belong to
S-block
P-block
D-block
F-block
45 Iodine difficiency in diet is known to cause
beri-beri
goiter
rickets
night blindness
46 The temperature at which RMS velocity of methane be equal to that sulpur dioxide at 300k
150k
600k
75k
1200k
47 Elements of which group from anions most rapidly
oxygen family
nitrogen group
halogens
alkali metals
48 A metal oxide contains 40% by mass of oxygen. Its equivalent weight is
40
48
12
20
49 9 gms of a trivalent metal contains with 35.5 g of chlorine. The atomic weight of metal is
3
9
18
12
50 The hydrogen atoms in acetylene are
basic
neutral
acidic
pasive
51 The IUPAC name of compound having the formula
3,3,3 Trimethyl -1-propene
1,1,1 - Trimethyl-2-2propene
3,3 dimethyle-1-1butene
1-isoprophyle ethylene
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
0.01
0.1
10,000
102
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
pthalic acid
salicylic acid
benzoic acid
phenyl acetic acid
54 Name the end product in the series
CH3COOH A BC
CH4
CH3OH
CH3CN
CH3CONH2
55 Our body converts all digestible carbohydrates into glucose which then undergoes oxidation and supplies energy to us. To store surplus glucose
the liver converts it into glycogen
the stomach converts it into starch
the pancreas converts it into glycogen
the liver converts it into starch
56 Chlorobenzene is
more reactive than ethyl bromide
nearly as reactive as methyl chloride
less reactive than benzyl chloride
more reactive than isoprophyle chloride
57 A 0.01M ammonia solution is 5% ionized. The concentration of
OH---- ions is
0.005M
0.0001M
0.0005M
0.05M
58 The relative strengths of hydrosalic acids are in the order :
HCl > HBr > HI
HI > HBr > HCl
HBr > HCl > HI
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 :
1:1
2:3
1:2
2:1
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
nitrous acid
nitrogen di oxide
nitric oxide
nitrogen pentoxide