Beillstein test is used for________?
A. Cl
B. N2
C. CO2
D. CO
Chemistry Mcqs
The stationary and mobile phases in paper chromatography are____________?
The stationary and mobile phases in paper chromatography are____________?
A. Liquid/liquid
B. Solid/liquid
C. Liquid/solid
D. Liquid/gas
The bond length of C=C is___________?
The bond length of C=C is___________?
A. 1.20A°
B. 1.34A°
C. 1.54A°
D. 1.68A°
The bond angle between hybrid orbitals in methane CH3 is___________?
The bond angle between hybrid orbitals in methane CH3 is___________?
A. 115.5°
B. 109.5°
C. 105. 7°
D. 180°
The criteria for aromaticity is presence of_________?
The criteria for aromaticity is presence of_________?
A. Unsaturations
B. Cyclic structure
C. Presence of 4nπ electrons
D. Presence of 4n+2π electrons
Chlorine Cl when attached to benzene has________?
Chlorine Cl when attached to benzene has________?
A. +I and +R effect
B. -1 and +R effect
C. +1 and -R effect
D. -I and -R effect
Which one of the following is most acidic?
Which one of the following is most acidic?
A. Phenol
B. P-nitrophenol
C. O-nitrophenol
D. M-nitrophenol
Which of the following effects best explains that o-nitrophenol is insoluble in water?
Which of the following effects best explains that o-nitrophenol is insoluble in water?
A. Inductive effect
B. Resonance effect
C. Intermolecular H-bonding
D. Isomeric effect
The carbon-carbon bond strength is maximum in__________?
The carbon-carbon bond strength is maximum in__________?
A. CH3CH3
B. CH2=CH2
C. Benzene
D. Cyclohexane
Which one of the following is caustic potash?
Which one of the following is caustic potash?
A. NaOH
B. KOH
C. NaCl
D. NaBH4