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Questions >> SAT >> Chemistry >> Liquids, solids and phase change

The process of heating a liquid mixture to form vapours and then cooling the vapours to get pure component is called

answered Oct 9, 2020 by magavali9225

2 answers

A mixture contains 9 gram each of $H_2O$ and $NaCl,$ what is the mole fraction of NaCl?

answered Aug 13, 2018 by meena.p

1 answer

A solution has $25\%$ w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride?

answered Aug 13, 2018 by meena.p

1 answer

The mass fraction of KCl in its aqueous solution is 0.051. What is the mole fraction of sodium chloride in the solution?

answered Aug 13, 2018 by meena.p

1 answer

The mole fraction of NaCl in water is 0.22. What is its mass percent?

answered Aug 13, 2018 by meena.p

1 answer

Which of the following choices is characteristic of molality?

answered Aug 13, 2018 by meena.p

1 answer

Calculate the molality of a solution of sodium hydroxide which contains 0.2 g of NaOH in 50 grams of the solvent

answered Aug 13, 2018 by meena.p

1 answer

The coordinate of the vertex of $y=\large\frac{-1}{3}$ $(x-1)^2+4$ is

answered Aug 13, 2018 by meena.p

1 answer

What is $f(g(x-2))$ if $f(x)=x^2-4$ and $g(x)=2x+3$ ?

answered Aug 13, 2018 by meena.p

1 answer

given $f(x)=x^2-4x+3$ , the ordered pair of $f(3)$ is

asked Aug 10, 2018 by meena.p

0 answers

The solution which is obtained after filtration is

answered Aug 10, 2018 by meena.p

1 answer

The solution of impure compound and solvent is concentrated to get

answered Aug 10, 2018 by meena.p

1 answer

At room temperature, the impure compound in crystallisation is

answered Aug 10, 2018 by meena.p

1 answer

Select the correct statement from the following options.

answered Aug 10, 2018 by meena.p

1 answer

The molar heat of vaporisation $(\Delta \;H_{vap})$ for water is

answered Aug 10, 2018 by meena.p

1 answer

An octahedral void is present at each edge of the FCC lattice. How much of each of these voids belong to each unit cell?

answered Aug 10, 2018 by meena.p

1 answer

If N is the number of tetrahedral voids in a close-packed structure, then the number of octahedral voids is:

answered Aug 10, 2018 by meena.p

1 answer

The density of a solution prepared by dissolving $120 \;g$ of urea (mol.mass = 60 u) in 1000 g of water is 1.15 g/mL. The molarity of this solution is:

answered Aug 10, 2018 by meena.p

1 answer

The density $(in\; g\; mL^{–1})$ of a $3.60\; M$ sulphuric acid solution that is $29\%\; H_2SO_4$ (Molar mass = $98\; g\; mol^{–1})$ by mass will be:

answered Aug 10, 2018 by meena.p

1 answer

Calculate the molality of a solution containing $6.3$ grams of Oxalic acid crystals dissolved in $0.5$ kilograms of solvent. Molecular weight of Oxalic acid = 126 grams/mole.

answered Aug 9, 2018 by meena.p

1 answer

What is the molality of a solution of $0.540\; M \;HCl$ present in $155\; ml$ of solution. The weight of the solute, water, is $0.150 \;kg.$

answered Aug 9, 2018 by meena.p

1 answer

Co-ordination number of a crystalline solid is

answered Aug 9, 2018 by meena.p

1 answer

The edge length of an FCC lattice is X times the atomic radius. Value of X is:

answered Aug 9, 2018 by meena.p

1 answer

The void fraction is the ratio of unfilled volume to total volume of a structure. For ideal metallic FCC crystal, it is:

answered Aug 9, 2018 by meena.p

1 answer

Number of particles in one unit cell of HCP lattice is:

answered Aug 9, 2018 by meena.p

1 answer

With increase in temperature, which of these changes?

answered Aug 9, 2018 by meena.p

1 answer

A solid of density d is dropped in a liquid of density D, if d>D then,

answered Aug 9, 2018 by meena.p

1 answer

What is the molar concentration of a solution with 32 grams of $SO_2$ in 0.5 liter solution?

answered Aug 9, 2018 by meena.p

1 answer

Which of the following is not the unit of concentration?

answered Aug 9, 2018 by meena.p

1 answer

What is the mass fraction of 4 moles of Sodium in 8 moles of Hydrogen chloride?

answered Aug 9, 2018 by meena.p

1 answer

How many atoms of carbon represent 1.5 mole?

answered Aug 9, 2018 by meena.p

1 answer

Which of the following is heat required in phase transitions?

answered Aug 9, 2018 by meena.p

1 answer

A solution has $25\%$ w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride?

answered Aug 9, 2018 by meena.p

1 answer

If the mole fraction of 4.5 moles of solute is 0.5, what is the number of moles of solvent?

answered Aug 9, 2018 by meena.p

1 answer

What is the mole fraction of sodium with moles n in a solution with moles of solvent N?

answered Aug 9, 2018 by meena.p

1 answer

Number of particles in one unit cell of HCP lattice is:

answered Aug 7, 2018 by meena.p

1 answer

Coordination number of HCP and FCC lattices respectively are

answered Aug 7, 2018 by meena.p

1 answer

The edge length of $NaCl$ unit cell is $500\; pm$ . What is the density of $NaCl$ in $g/cm^3 ?$ [NA = 6.02 x 1023, Na = 23.0, Cl = 35.5 a.m.u.]

answered Aug 7, 2018 by meena.p

1 answer

Crystallisation is based on the

answered Aug 7, 2018 by meena.p

1 answer

Which of the following is not a common method used for purification?

answered Aug 7, 2018 by meena.p

1 answer

Calculate the molarity of a solution created by pouring $7.62\; grams$ of $MgCl_2$ into enough water to create 400 mL of solution.

answered Aug 7, 2018 by meena.p

1 answer

Calculate the molarity of a solution containing 100 gr of $NaCl\; (Mw = 58.5)$ in 1.5 liters of water.

answered Aug 7, 2018 by meena.p

1 answer

Calculate the ml of a 1 M solution of NaCl needed to prepare 100 ml of a 0.2 M solution.

answered Aug 7, 2018 by meena.p

1 answer

A solution of $NaOH (mw = 40)$ is prepared by dissolving 20 grams of the base in enough water to make one liter of solution. Calculate the molarity of this solution.

answered Aug 7, 2018 by meena.p

1 answer

What are the disadvantages of using high alkaline water?

answered Aug 7, 2018 by meena.p

1 answer

With respect to the constituents causing alkalinity in water, which of the following situation never arises?

answered Aug 7, 2018 by meena.p

1 answer

The normal boiling point of a liquid is the temperature at which it boils when the external pressure is

answered Aug 7, 2018 by meena.p

1 answer

The boiling point and molar heat of vaporisation is dependent on

answered Aug 7, 2018 by meena.p

1 answer

The process of distillation is used for the liquids having

answered Aug 7, 2018 by meena.p

1 answer

Porcelain pieces are put into the distillation flask to avoid

answered Aug 6, 2018 by meena.p

1 answer

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