Answer:
C. some substances can move freely across the cell membrane, while others must be transported.
Explanation:
Answer:
Sugar solution seperation method is Distillation
iron power and sand separation method is Magnetic separation
Petrol and diesel separation method is Fractional Distillation
Camphor and glass powder seperation method is Sublimation
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if the product has lesser energy than the reactants it means enthalpy change value is positive.so it is endothermic reaction where the heat is absorbed.so kcl will formation will have positive enthalpy change .
Shielding effect being attendency of the inner electrons to repel the outermost electrons, an increase in shielding effect increases atomic radius and decrease reduces the atomic radius
