MCQ 11 Mark
Molarity of pure water is -
- A5.5
- ✓55.5
- C$18.0$
- D$10.0$
Answer
View full question & answer→Correct option: B.
55.5
B
50 questions · timed · auto-graded
Explanation:
When two perfect solutions are mixed, there is no change in volume.
Explanation:
At the same temperature and pressure, the volume occupied by a single gas alone in a combination is a portion of a volume.
Explanation:
Mixture of Methanol and acetone shows positive deviation because methanol-methanol and acetone-acetone interactions are more than methanol-acetone. The more number of hydrogen bonds are broken the less number of new H-bonds are formed.
Explanation:
Molar concentration is a measure of the concentration of a solute in a solution and its unit is mol L−1. Molarity is a method to express the concentration of a solution. It is defined as the number of moles of solute dissolved per liter of solution.
Hence, when 1 mole of a substance is present in 1L of the solution, it is known as a molar solution.
Explanation:
Vapour pressure of a dilute solution depends upon the temperature, mole fraction, and degree of dissociation of solute and independent of the melting point of solute.
Explanation:
A concentrated solution contains the maximum amount of solute that can be dissolved because solubility depends on temperature, a solution that is concentrated at one temperature may not be concentrated at a higher temperature.
Explanation:
During phase transition, temperature is taken on the x-axis of the phase transition curve, hence, during phase transition the temperature of substance changes.
Explanation:
A Manometer is a device to measure pressures. A common simple manometer consists of a U shaped tube of glass filled with some liquid. Typically the liquid is mercury because of its high density.
Explanation:
An ideal solution is made up of numerous components, each of which has a property that is the weighted sum of the attributes of the others.
Explanation:
KCl (K+ + Cl) and NaCl(Na+ + Cl) ionize to give 2 ions and K2SO4(2K+ + SO-4) ionizes to give 3 ions thus, van’t Hoff factors for KCl, NaCl and K2SO4 are 2, 2 and 3 respectively.
Explanation:
The definition of true solution is a homogeneous mixture of two or more substances in which substance dissolved (solute) in solvent has the size of the particle less than 10−9m or 1nm. So the perfect example of true solution is ENO salt in water. ENO is perfectly soluble in water and has minimum size.
Explanation:
Solution of glucose is a non-electrolytic solution.
For a non - electrolytic solution, vant hoff factor is 1.
Information:
Explanation:
For an ideal solution A-A and B-Bintermolecular interactions should be nearly same as A-B type interactions.
Explanation:
Partial pressure is the pressure exerted by a single component in a gaseous mixture if it exists alone in the same volume.
Explanation:
When a solution is diluted at a constant temperature, its vapour pressure increases.
When the solution is diluted, the mole fraction of solute decreases and the mole fraction of solvent increases.
Hence, the relative lowering in vapour pressure decreases and the vapor pressure increases.
Explanation:
Vapour pressure will be the same because it doesn't depend on the volume it depends only on Temperature.
Explanation:
The molecules that are having weak intermolecular forces of attraction, they can easily dissociate and convert into vapour state, so, molecules with weak intractions have high vapour pressure.
Explanation:
The effect of temperature on solubility depends on the type of reaction that occurs during the process of dissolving the solute in the solvent. In endothermic reactions, increasing the temperature increases the solubility of the solute in a solution. In exothermic reactions, increasing the temperature decreases the solubility of the solute.
Explanation:
Non-ideal solution mixtures with same composition in liquid and vapour phase are azeotropes. Water-nitric acid has maximum boiling azeotrope and water-ethanol has a minimum boiling azeotrope.
Explanation:
When heating begins in miscible solutions, vapours will be of both liquids with a higher concentration of liquid having a low boiling point (since that component will be more volatile in nature).
Explanation:
High vapour pressure leads to the weak intermolecular forces of attraction in a liquid.Weaker are the intermolecular forces of attractions, more is the tendency for evaporation, more is vapour pressure, lower is boiling point.
Explanation:
Smoke is carbon (solid particle) dispersed in air. It is the type of solid in gas type of solution.