Correct Answer:- Option-D
Question29:-The Scientist who gave Chromatography concept
A:-Berzelius
B:-Avogadro
C:-Tswett
D:-Lavoiser
Correct Answer:- Option-C
Question30:-The marsh gas detector used by miners works on the principle of
A:-Difference in rate of diffusion of gases
B:-Avogadro's hypothesis
C:-Gay Lucas's law of gaseous volume
D:-Berzelius hypothesis
Correct Answer:- Option-A
Question31:-The shape of 2-butene is
A:-Linear
B:-Planar
C:-Tetrahedral
D:-Pyramidal
Correct Answer:- Option-B
Question32:-2-Bromopentane is heated with potassium ethoxide in ethanol the major product is
A:-trans-pent-2-ene
B:-2-etoxypentane
C:-pent-1-ene
D:-cis-pent-2-ene
Correct Answer:- Option-A
Question33:-Di alkyl sulphides are known as
A:-Sulphonal
B:-Thioesters
C:-Mercaptan
D:-Thioethers
Correct Answer:- Option-D
Question34:-The explosive nitroglycerine is
A:-a soap
B:-a salt
:-2 complex compound
D:-an ester
Correct Answer:- Option-D
Question35:-Tin plague means
A:-Tin plating
B:-Conversion of white tin to grey tin
:-Emission of sound white blending tin plate
D:-Conversion of stannous salt to stannic salt
Correct Answer:- Option-B
Question36:-Which makes use of Tyndall effect ?
A:-Ultrafilter
B:-Ultracentrifuge
C:-Ultramicroscope
D:-All the above
Correct Answer:- Option-C
Question37:-Which of the most effective in causing the coagulation of a positively charged ‘Fe(OH) (3)° sol ?
*NO_34(-)
50452.)
१0 ^ 4^(3-)`
‏نم‎ (64) ^(4-) 6 ^`
Correct Answer:- Option-D
Question38:-A non-narcotic analgesic
A:-Ibuprofen
B:-Coteine
C:-Herion