Options:
- A. Pb2O
- B. Pb3O4
- C. PbO2
- D. All of the above
View Answer
B. Pb3O4
Chemistry
Which of the following is different with respect to physical appearance ?
Options:
- A. Arsenic
- B. Phosphorus
- C. Antimony
- D. Bismuth
View Answer
B. Phosphorus
Which one of the followings possesses melting point below 0
Options:
- A. Nitrogen
- B. Phosphorus
- C. Carbon
- D. Bismuth
View Answer
A. Nitrogen
The most powerful oxidizing agent among the halogens is__________________?
Options:
- A. F2
- B. Cl2
- C. Br2
- D. I2
View Answer
A. F2
Which of the following statements is incorrect about fluorine_______________?
Options:
- A. fluorine is restricted to -1 oxidation state
- B. fluorine follows octet rule and as well as extended octet rule
- C. fluorine has lowest dissociation energy among the halogens
- D. both B and C
View Answer
D. both B and C
Molozonide is unstable and changes into ozonide on_________________?
Options:
- A. reduction
- B. oxidation
- C. hydrolysis
- D. rearrangement
View Answer
D. rearrangement
Dehalogenation of ethyl tetrahalide will give____________________?
Options:
- A. ethene
- B. ethyne
- C. ethyl halide
- D. all of the above are possible
View Answer
B. ethyne
Grignard reagent is reactive due to___________________?
Options:
- A. the presence of halogen atom
- B. the presence of magnesium atom
- C. the polarity of C-Mg bond
- D. all
View Answer
C. the polarity of C-Mg bond
Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?
Options:
- A. formaldehyde
- B. ketone
- C. ethylene epoxide
- D. both A & C
View Answer
D. both A & C
The hydrogenation of phenol in the presence of Ni and heat gives_________________?
Options:
- A. cyclohexane
- B. n
- C. 1
- D. cyclohexanol
View Answer
D. cyclohexanol