Options:
- A. Mass number
- B. Atomic mass
- C. Relative abundance
- D. all of the above
View Answer
C. Relative abundance
Chemistry
Which of the following statements about isotopes is correct ?
Options:
- A. Isotopes with odd atomic number are abundant
- B. Isotopes with odd atomic number and even mass number are abundant
- C. Isotopes with even atomic number and even mass number are abundant
- D. Isotopes with even atomic number and odd mass no are abundant
View Answer
C. Isotopes with even atomic number and even mass number are abundant
1 a.m.u =__________________?
Options:
- A. 1.6 x 10-27 kg
- B. 1.6 x 10-24 kg
- C. 1.6 x 10-26 kg
- D. 1.6 x 10-28 kg
View Answer
A. 1.6 x 10-27 kg
One mole of CO2 contains?
Options:
- A. 6.022 x 1023 atoms of oxygen
- B. 22-gram electrons
- C. 6.022 x 1023 atms of carbon
- D. both B. & C.
View Answer
D. both B. & C.
Which of the following are isoelectronic species ?
Options:
- A. H+ H H-
- B. Li+ Na+ K+
- C. C1- Br- I
- D. F- Ne Na+
View Answer
D. F- Ne Na+
The number of isotopes of elements with even mass number and even atomic number are ________________?
Options:
- A. 280
- B. 300
- C. 154
- D. 54
View Answer
C. 154
Molecular ions are formed by passing______________________?
Options:
- A. High energy electron beam
- B. ?
- C. X-rays
- D. All of the above
View Answer
D. All of the above
Which of the following terms is not used for ionic compound ?
Options:
- A. formula unit
- B. empirical formula
- C. molecular formula
- D. formula mass
View Answer
C. molecular formula
Which one is true about isotope ?
Options:
- A. Same number of neutrons
- B. Same mass number
- C. Same physical properties
- D. Same chemical properties
View Answer
D. Same chemical properties
moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________?
Options:
- A. 0.18 mole
- B. 0.27 mole
- C. 0.24 mole
- D. 0.09 mole
View Answer
A. 0.18 mole