!.In a solution of saltwater (a saline solution), salt is the:
A.solute
B.solvent
C.Colloid
D.Sol
Answer: Solute
Salt is the solute because it dissolves in the solvent (water). In a mixture of two fluids, the solute is present in lesser quantity compared with the solvent.
2. All of the following elements are liquids around room temperature except which one?
A.Gallium
B.Bromine
C.Magnesium
D.Murcury
Answer: Mercury
Bromine and mercury are liquid at room temperature. You can melt gallium in the palm of your hand. If you put pure magnesium in your hand, it may react with the water in your skin and ignite, but it won't melt.
3.All of the following are amino acids except:
A.Tryptophan
B.Leucine
C.Adenine
D.Tyrosine
A.solute
B.solvent
C.Colloid
D.Sol
Answer: Solute
Salt is the solute because it dissolves in the solvent (water). In a mixture of two fluids, the solute is present in lesser quantity compared with the solvent.
2. All of the following elements are liquids around room temperature except which one?
A.Gallium
B.Bromine
C.Magnesium
D.Murcury
Answer: Mercury
Bromine and mercury are liquid at room temperature. You can melt gallium in the palm of your hand. If you put pure magnesium in your hand, it may react with the water in your skin and ignite, but it won't melt.
3.All of the following are amino acids except:
A.Tryptophan
B.Leucine
C.Adenine
D.Tyrosine
Answer:Adenine
Adenine is a nucleic acid and not an amino acid.
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