Recent questions in Chemistry

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

asked Aug 13, 2018 by meena.p

1 answer

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

asked Aug 13, 2018 by meena.p

1 answer

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

asked 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

asked Aug 10, 2018 by meena.p

1 answer

The solution of impure compound and solvent is concentrated to get

asked Aug 10, 2018 by meena.p

1 answer

At room temperature, the impure compound in crystallisation is

asked Aug 10, 2018 by meena.p

1 answer

Select the correct statement from the following options.

asked Aug 10, 2018 by meena.p

1 answer

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

asked 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?

asked 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:

asked 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:

asked 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:

asked 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.

asked 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 $0.150 \;kg.$

asked Aug 9, 2018 by meena.p

1 answer

Co-ordination number of a crystalline solid is

asked 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:

asked 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:

asked Aug 9, 2018 by meena.p

1 answer

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

asked Aug 9, 2018 by meena.p

1 answer

With increase in temperature, which of these changes?

asked 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,

asked 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?

asked Aug 9, 2018 by meena.p

1 answer

Which of the following is not the unit of concentration?

asked Aug 9, 2018 by meena.p

1 answer

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

asked Aug 9, 2018 by meena.p

1 answer

How many atoms of carbon represent 1.5 mole?

asked Aug 9, 2018 by meena.p

1 answer

Which of the following is heat required in phase transitions?

asked 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?

asked 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?

asked 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?

asked Aug 9, 2018 by meena.p

1 answer

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

asked Aug 7, 2018 by meena.p

1 answer

Coordination number of HCP and FCC lattices respectively are

asked 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.]

asked Aug 7, 2018 by meena.p

1 answer

Copper crystallises in face-centred cubic lattice and has a density of $8.930\; g\; mol^{-3}$ at 293 K. Calculate the edge length of unit cell. [At. mass of Cu = 63.5 a.m.u, Avogadro's constant NA = 6.02 x 1023].

asked Aug 7, 2018 by meena.p

1 answer

Crystallisation is based on the

asked Aug 7, 2018 by meena.p

1 answer

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

asked 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.

asked 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.

asked 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.

asked 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.

asked Aug 7, 2018 by meena.p

1 answer

What are the disadvantages of using high alkaline water?

asked Aug 7, 2018 by meena.p

1 answer

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

asked 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

asked Aug 7, 2018 by meena.p

1 answer

The boiling point and molar heat of vaporisation is dependent on

asked Aug 7, 2018 by meena.p

1 answer

The process of distillation is used for the liquids having

asked Aug 7, 2018 by meena.p

1 answer

Porcelain pieces are put into the distillation flask to avoid

asked Aug 6, 2018 by meena.p

1 answer

State true or false. Alkalinity is a measure of the ability of water to neutralize the acids.

asked Aug 6, 2018 by meena.p

1 answer

In case of water and glass, we get a concave meniscus because the adhesive force between water and glass are _______________ than the cohesive forces between water molecules.

asked Aug 6, 2018 by meena.p

1 answer

The molar heat of fusion (kJ/mol) of water is

asked Aug 6, 2018 by meena.p

1 answer

The melting point of mercury is

asked Aug 6, 2018 by meena.p

1 answer

Select the incorrect statement from the following option.

asked Aug 3, 2018 by meena.p

1 answer

Ask Questions, Get Answers