Free MCQs & Online Quiz Practice for Exams

Q: If CO2 level increases from normal level, what will happen: (ETEA 2017)

A) Decrease in sea level

B) Increase in sea level

C) Longer winter season

D) Daytime will increase

Q: Blue baby syndrome is caused due to: (ETEA 2017)

A) A phosphate in diets

B) Chlorates in diets

C) Excessive nitrate in diets

D) Deficiency of nitrate

Q: By absorption of visible light, which compound gives smoggy air its brown tint: (ETEA 2017)

A) NO

B) SO3

C) NO3

D) NO2

Q: Photochemical smog is primarily caused by: (ETEA 2019)

A) O3

B) NO2

C) SO3

D) CO2

Q: Pollutant which decolorizes the skin: (ETEA 2019)

A) Mercury

B) Arsenic

C) Lead

D) Cadmium

Q: NO2 gas shows maximum absorption at about nm: (ETEA 2019)

A) 400

B) 700

C) ETEA 200

D) 170

Q: Major contributor to greenhouse effect: (ETEA 2019)

A) Ozone

B) CO2

C) CH4

D) NO5

Q: Pollutant which limits synthesis of hemoglobin: (ETEA 2019)

A) Hg

B) Pb

C) Ni

D) Ag

Q: Bond formed between two monosaccharide units is called: (ETEA 2019)

A) Ionic bond

B) Hydrogen bond

C) Peptide bond

D) Glycosidic bond

Q: Ozone layer in upper atmosphere is being destroyed by: (ETEA 2019)

A) Chlorofluorocarbons

B) Freon

C) Smog

D) Both a and b

Q: tπ* electronic transition occurs in: (ETEA 2015)

A) double bond

B) triple bond

C) aromatic ring

D) all

Q: Tetramethyl silane (TMS) is added as standard in NMR, TMS is: (ETEA 2016)

A) Nonvolatile compound

B) Less volatile compound

C) Highly volatile compound

D) Highly reactive compound

Q: IR spectra is usually expressed as: (ETEA 2016)

A) Wave length

B) Wave number

C) Frequency

D) All of the above

Q: Chemical shift in NMR spectroscopy is expressed as delta (δ) or Tau (T) scale. Correct relationship: (ETEA 2016)

A) δ=10-T

B) δ=10+1

C) 1=δ-10

D) T=10-δ

Q: Functional group region in infrared spectrum lies between: (ETEA 2016)

A) 500-1300 cm-1

B) 600-1500 cm-1

C) 1500-4000 cm-1

D) 2500-3500 cm-1

Q: Electronic transition involved in visible region is: (ETEA 2016)

A) g→σ*

B) d-d

C) π→π*

D) n→σ*

Q: Water formed in combustion analysis is absorbed by: (ETEA 2016)

A) Mg(NO3)2

B) Mg(ClO)2

C) Mg(OH)2

D) Mg(ClO2)2

Q: NMR spectrum of benzene will show: (ETEA 2016)

A) 12-peaks

B) 6-peaks

C) 3-peaks

D) Only a single peak

Q: Spin states of a nucleus of an atom in absence of magnetic field have: (ETEA 2016)

A) different energies

B) equal energies

C) zero energies

D) high energies

Q: Atom not having spin quantum number 1/2: (ETEA 2016)

A) C-13

B) N-15

C) F-19

D) O-16