If 30cm3 of gas at 50oC is warmed to 80o at a fixed pressure, the fractional increase in volume is
0.009
0.093
0.910
1.090
Correct answer is D
No explanation has been provided for this answer.
The idea of planetary electron was that of
Rutherford
Thompson
Bohr
Dalton
Correct answer is A
No explanation has been provided for this answer.
The order in which a mixture of sand, ammonium chloride and sodium chloride can be separated is
dissolution → dryness → filtration → evaporation
filtration → sublimation → evaporation → dryness
sublimation → dissolution → filtration → evaporation
dissolution → filtration → sublimation → evaporation
Correct answer is C
No explanation has been provided for this answer.
A decrease in atomic size and an increase in nuclear charge across a period lead to
an increase in the tendency to lose electron
an increase in chemical reactivity
a decrease in electropositivity
a decrease in covalency in bond formation
Correct answer is B
No explanation has been provided for this answer.
The element with the electron configuration 1s22s22p3 is
calcium
chlorine
oxygen
nitrogen
Correct answer is D
No explanation has been provided for this answer.