Q: What is the separation of compounds on the basis of their solubilities in a given solvent? Choices: - solvent law - fractional mass - volatile crystallization - fractional crystallization A:
fractional crystallization

(Question)
Q: Why are goose feathers preferred for stuffing by manufacturers? Choices: - multi layers build up - smoothness - thickness - softness A:
(Answer)
softness

Ques: Q: What is a measure of the size of sound waves? Choices: - voltage - wavelength - frequency - amplitude A:
Ans: amplitude

(Q).
Q: When does exchange of dna segments happen between non-sister chromatids of homologous chromosomes? Choices: - during meiosis - during mitosis - during diversion - during crossing-over A:
(A).
during crossing-over

Ques:Q: What is defined as the product of a force times the distance over which the force acts? Choices: - matter - motion - energy - work A:

Ans:work

Q: When what common element forms single bonds with other atoms, the shape is tetrahedral, and when its atoms form a double bond, the shape is planar? Choices: - oxygen - hydrogen - silicon - carbon A:
carbon