Options:
- A. Fe>Co> Ni
- B. Co > Ni > Fe
- C. Ni> Co> Fe
- D. Co >Fe>Ni
View Answer
B. Co > Ni > Fe
Chemistry
The stationary and mobile phases in paper chromatography are____________?
Options:
- A. Liquid/liquid
- B. Solid/liquid
- C. Liquid/solid
- D. Liquid/gas
View Answer
B. Solid/liquid
Generally the limit of visible spectrum is__________?
Options:
- A. 1000 to 300 A
- B. 3800 to 7600 A
- C. 8000 to 10,000 A
- D. 12,000 to 15,000 A
View Answer
B. 3800 to 7600 A
Beillstein test is used for________?
Options:
- A. Cl
- B. N2
- C. CO2
- D. CO
View Answer
A. Cl
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________?
Options:
- A. 2 R
- B. R/2
- C. 3R/4
- D. R/4
View Answer
C. 3R/4
Presence of nitrogen in organic compounds is tested as__________?
Options:
- A. Nitrogen gas
- B. NH3
- C. CN?
- D. NO
View Answer
C. CN?
Magnetic quantum number specifies___________?
Options:
- A. Size of orbitals
- B. Shape of orbitals
- C. Orientation of orbitals
- D. All of the above
View Answer
C. Orientation of orbitals
What is the molecular formula for Nitric acid ________ ?
Options:
- A. HNO2
- B. HNO3
- C. HN2O2
- D. H2NO4
View Answer
B. HNO3
Which of the following statements is false about transition metals?
Options:
- A. They form complexes
- B. They show variable valency
- C. All transition metal compounds are paramagnetic
- D. They form coloured ions
View Answer
C. All transition metal compounds are paramagnetic
What is the molecular Weight of Nitric acid (HNO3 ) ?
Options:
- A. 63.012 g/mol
- B. 65.012 g/mol
- C. 70.012 g/mol
- D. 81.011 g/mol
View Answer
A. 63.012 g/mol