Options:
- A. oxygen
- B. carbon
- C. tin
- D. chlorine
View Answer
C. tin
Chemistry
The volume occupied by 2.8 g of N2 at STP______________________?
Options:
- A. 2.24 dm3
- B. 22.4 dm3
- C. 1.12 dm3
- D. 112 dm3
View Answer
A. 2.24 dm3
The number of moles of CO2 which contains 16 g of oxygen is__________________?
Options:
- A. 0.25
- B. 0.5
- C. 0.75
- D. 1
View Answer
B. 0.5
How many isotopes have odd atomic number ?
Options:
- A. 154
- B. 280
- C. 86
- D. 300
View Answer
C. 86
Covalent network crystals have_____________?
Options:
- A. higher melting point then molecular crystals
- B. lower melting point then molecular crystals
- C. discrete molecules linked by Van der waals forces
- D. hydrogen bonding
View Answer
A. higher melting point then molecular crystals
What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called?
Options:
- A. Paint
- B. Glass
- C. Gun Powder
- D. Cement
View Answer
C. Gun Powder
Diameter of an atom is in the order of________________?
Options:
- A. 0.2m
- B. 0.2mm
- C. 0.2nm
- D. 0.2pm
View Answer
C. 0.2nm
The soul of chemistry is dealing with___________?
Options:
- A. Internal structural changes in matter
- B. Composition of matter
- C. Properties of matter
- D. Composition and properties of matter
View Answer
D. Composition and properties of matter
The radioactive isotope of hydrogen is called___________?
Options:
- A. tritium
- B. deuterium
- C. protium
- D. ortho-hydrogen
View Answer
A. tritium
Electron was discovered by?
Options:
- A. Michael Faraday
- B. James Maxwell
- C. Yuri Gagarin
- D. J.J Thomson
View Answer
D. J.J Thomson