Options:
- A. A
- B. Ag
- C. Both
- D. Neither
View Answer
B. Ag
Chemistry
Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?
Options:
- A. aluminium can be recycled
- B. aluminium has very low density
- C. aluminium is the most abundant metal in the earth crust
- D. aluminium is resistant to corrosion by organic acids.
View Answer
D. aluminium is resistant to corrosion by organic acids.
Isotopes differs in______________________?
Options:
- A. arrangement of electrons in orbitals
- B. position in the periodic table
- C. properties depend upon mass
- D. chemical properties
View Answer
D. chemical properties
The radioactive isotope of hydrogen is called___________?
Options:
- A. tritium
- B. deuterium
- C. protium
- D. ortho-hydrogen
View Answer
A. tritium
Mostly elements have fractional atomic masses because of______________________?
Options:
- A. Mass of an atom itself is in fraction
- B. Atomic masses are average masses of isobars
- C. Atmoic masses are average masses of isotopes proportional to their relative abundance
- D. Atmoic masses are average masses of isotopes
View Answer
C. Atmoic masses are average masses of isotopes proportional to their relative abundance
The mass of decimole of electrons (NA) is___________________?
Options:
- A. 1.008 mg
- B. 0.184 mg
- C. 0.054 mg
- D. 5.4 mg
View Answer
C. 0.054 mg
Metallic crystals are soluble in________________?
Options:
- A. Polar solvent
- B. Non polar solvent
- C. Fused metal
- D. None
View Answer
C. Fused metal
In which of the following type of reactions energy of reactant is greater than energy of product________________?
Options:
- A. endothermic
- B. exothermic
- C. unpredictable
- D. same
View Answer
B. exothermic
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
Options:
- A. pink
- B. black
- C. yellow
- D. brick red
View Answer
D. brick red
The volume occupied by 1.4g CO at S.T.P is___________________?
Options:
- A. 22.4 dm3
- B. 2.24 dm3
- C. 1.12 cm3
- D. 1.12 dm3
View Answer
D. 1.12 dm3