During isothermal expansion of an ideal gas, its internal energy
(a) Increases
(b) Decreases
(c) May increase or decrease
(d) Remains unchanged
Answer:
Which of the following is closed system
(a) Pressure cooker
(b) Jet engine
(c) Tea placed in steel kettle
(d) Rocket engine during propulsion
Answer:
Born-Haber cycle is used to determine
(a) Lattice energy
(b) Electronegativity
(c) Both
(d) None of these
Answer:
Which among the following has the highest ionization potential
(a) B
(b) Li
(c) F
(d) Ne
Answer:
Which of the following among alkali metals is most reactive?
(a) K
(b) Rb
(c) Cs
(d) Na
Answer:
Which of the following has zero electron affinity
(a) Fluorine
(b) Nitrogen
(c) Neon
(d) Oxygen
Answer:
Which of the following elements is most metallic?
(a) Bi
(b) Sb
(c) P
(d) As
Answer:
The molarity of pure water is
(a) 18 m
(b) 50m
(c) 55.6m
(d) 100m
Answer:
Colligative properties of the solution depend upon
(a) Number of moles of solvent
(b) Number of solute particles
(c) Nature of solution
(d) Nature of solvent
Answer:
Pure water does not conduct electricity because it is
(a) Readily decomposed
(b) Almost not ionised
(c) Low boiling
(d) Neutral
Answer: