- Derivatives of perhydrocyclopentanophenanthrene are called as: (PPSC-2021)?
a) Phospholipids
b) Proteins
c) Steroids
d) None of these - When all the monosaccharides in a polysaccharide are same type, such type of a polysaccharide is called a _?
a) Glycogen
b) Homoglycan
c) Heteroglycan
d) Oligosaccharide - Which continent has no glacier?
a) Australia
b) Wurtz Reaction
c) Clemmenson reaction
d) None of these - What is the correct order of reactivity of the following haloacids with a given alcohol?
a) HCl > HBr > HI
b) HI > HBr > HCl
c) HBr > HCl > HI
d) HI > HCl > HBr
30 .When ethanol reacts with PCl5, it gives three products which include chloroethane and hydrochloric acid. What is the third product?
a) Phosphorus acid
b) Phosphoric acid
c) Phosphorus trichloride
d) Phosphoryl chloride
- Which of the following is used for preparing urotrpoic medicine?(ppsc2017)?
a) Benzaldehyde
b) Acetone
c) Formaldehyde
d) Ethyl Alcohol - Reactions in which Ketones form alkanes on reaction with Zn+Hg in presence of HCl is called as: (PPSC-2021)?
a) Clemmenson Reaction.
b) Wolf-Kishner Reaction
c) Hoff man Reaction
d) None of thes - Which of the following denatures alcohol? (PPSC-2021)?
a) Methanol
b) Acetone
c) Pyridine
d) All of these - n to π* transition is shown by which of the following: (PPSC-2022?
a) Ethanol
b) Ether
c) Ethane
d) None of them
35.Shifting of spectral lines in region of lower wavelength: (PPSC-2020)?
a) Bathochromic shift
b) Hypsochromic shift
c) Incread wavelength
d) None of these
- Number of Vibrational degrees of freedom in CO2 is: (PPSC-2021)?
a) 2
b) 4
c) 5
d) None of these - Number of peaks observed in mass spectrometer shows: (PPSC-2021)?
a) No, of isotopes
b) Mass of isotopes
c) Charge of isotopes
d) None of these - If the kinetic energy of an electron is 5J. Find out its wavelength.?
a) 0.313 x 1015 m/s
b) 3.013 x 1015 m/s
c) 3.310 x 1015 m/s
d) 3.313 x 1015 m/s - What is the use of ether layer in solvent extraction??
a) To separate organic impurities
b) To separate inorganic impurities
c) To separate fibres
d) TO separate solvent - Which of the following is separated through column chromatography?
a) Chlorophyll and carotenoids
b) Inorganic cations or complexes
c) Sugar derivatives
d) Amino acids formed by hydrolysis of a protein molecule - 1-Chlorobutane on reaction with alc.KOH forms: (PPSC-2020)?
a) 1-Butene
b) 3-Hexene
c) 1-Butyne
d) None of these - Calcium Carbide reacts with water to give:?
a) Methane
b) Ethylene
c) Acetylene
d) None of these. - Which one of the following is not a petrochemical?
a) Cumene
b) Paraffin
c) Aluminum Chloride
d) Epoxy resin - Reaction of pyrrole in CHCl3 in presence of alkali is: (PPSC-2021)?
a) Friedel Craft reaction
b) Saponiifcation
c) Hoffmann’s Reaction
d) Riemann Tiemann Reaction - Sendmeyer’s reation is the formation of : (PPSC-2020)?
a) Summetrical alkanes
b) Substituted Benzene
c) Aryl Halides from aryl Dizonium salts. (PPSC-2020)
d) None of these - What is the % yield of H2O if 138 g H2O is produced from 16g of H2 and excess O2?
a) 93.5%
b) 94.6%
c) 95.7%
d) 96.7% - Oxidation of Naphthalene with chromic acid gives: (PPSC-2022)?
a) 1,4-Nephthoquinone
b) Phthalic anhydride
c) Phthalic acid
d) None of these - Reaction condition:V2O5 catalyst at 450ºC (PPSC-2020)?
a) Oxidation of Benzene
b) Nitration of Toluene
c) Reduction of Benzene
d) None of these - Toluene is prepared from benzene.?
a) Wurtz-Fittig reaction
b) Perkin reaction
c) Wurtz reaction)
d) Friedel craft reaction - Optically active compounds with three asymmetric centres will have no. of possible isomers as: (PPSC-2020)?
a) 6
b) 7
c) 8
d) 9
