Chemistry - 02
6. Atoms with the same mass number but having different nuclear charges are called
(A) Isochores
(B) Isotones
(C) Isotopes
(D) Isobars.
(A) Isochores
(B) Isotones
(C) Isotopes
(D) Isobars.
Correct Answer: [D] Isobars..
7. The number of electrons present in H+ is
(A) Zero
(B) One
(C) Two
(D) Three.
(A) Zero
(B) One
(C) Two
(D) Three.
Correct Answer: [A] Zero.
8. The strongest electropositive element is
(A) Mg
(B) K
(C) Cs
(D) Li.
(A) Mg
(B) K
(C) Cs
(D) Li.
Correct Answer: [C] Cs.
9. Ethyl alcohol is completely mixed with water. It can be separated from that mixture by
(A) Fractional distillation
(B) Allowing the water to evaporate
(C) Using a separating funnel
(D) Evaporation.
(A) Fractional distillation
(B) Allowing the water to evaporate
(C) Using a separating funnel
(D) Evaporation.
Correct Answer: [A] Fractional distillation.
10. Which of the following modes of expressing concentrations is independent of temperature?
(A) Normality
(B) Formality
(C) Molarity
(D) Molality.
(A) Normality
(B) Formality
(C) Molarity
(D) Molality.
Correct Answer: [D] Molality..
0 Comments:
Post a Comment