Recent questions tagged liquids-solids-and-phase-change

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

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

asked Aug 6, 2018 by meena.p

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The melting point of mercury is

asked Aug 6, 2018 by meena.p

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Select the incorrect statement from the following option.

asked Aug 3, 2018 by meena.p

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The purity of compound is confirmed by

asked Aug 3, 2018 by meena.p

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Which of the following is an application of surface tension?

asked Aug 3, 2018 by meena.p

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On increasing the temperature, the surface tension of the liquid

asked Aug 3, 2018 by meena.p

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Select the incorrect statement from the following option.

asked Aug 3, 2018 by meena.p

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Shapes of drops of liquid are spherical because of

asked Aug 3, 2018 by meena.p

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Select the incorrect statement from the following option.

asked Aug 3, 2018 by meena.p

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According to Newton's law of viscosity, the maximum velocity of flow is at

asked Aug 3, 2018 by meena.p

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The boiling point and molar heat of vaporisation is dependent on

asked Aug 3, 2018 by meena.p

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For a given substance, choose the correct statement.

asked Aug 3, 2018 by meena.p

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The surface tension of water at $25^{\circ}\;C$ is

asked Aug 2, 2018 by meena.p

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The unit of surface tension in CGS system is

asked Aug 2, 2018 by meena.p

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Which of the following will vaporize faster ?

asked Aug 2, 2018 by meena.p

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How aniline and chloroform can be separated?

asked Aug 2, 2018 by meena.p

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

asked Aug 2, 2018 by meena.p

2 answers

The temperature at which solid and liquid coexist in equilibrium is called

asked Aug 2, 2018 by meena.p

1 answer

The purity of compound is confirmed by

asked Aug 2, 2018 by meena.p

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At 1 atm pressure, the boiling point of water is

asked Aug 2, 2018 by meena.p

1 answer

Select the incorrect statement from the following options.

asked Aug 2, 2018 by meena.p

1 answer

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

asked Aug 2, 2018 by meena.p

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A 1.50 gram sample of urea is dissolved in 105.0 gram of water and produces a solution that boils at $100.12^{\circ}C$ . From these data , what is the molecular mass of urea?

asked Aug 1, 2018 by meena.p

1 answer

How many grams of $NaOH$ are dissolved in 200. milliliters of solution if its concentration is $1.50\;M$

asked Aug 1, 2018 by meena.p

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How many grams of NaCl are needed to prepare 200 gram of a 10 % salt solution ?

asked Aug 1, 2018 by meena.p

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How much heat is needed to change 100.0 gram of ice at $273\;K$ to steam at $373\;K$?

asked Aug 1, 2018 by meena.p

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

asked Aug 1, 2018 by meena.p

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The boiling point of a liquid is the temperature at which the vapour pressure

asked Aug 1, 2018 by meena.p

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On increasing the temperature of a liquid, its vapour pressure

asked Aug 1, 2018 by meena.p

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Which of the following correctly states how the viscosities of a liquid and a gas will change with temperature?

asked Aug 1, 2018 by meena.p

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The viscous force the relative motion between the adjacent layers of a fluid in motion. Which one of the flowing fits best in the sentence?

asked Aug 1, 2018 by meena.p

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Water flows between two plates of which the upper one is stationary and the lower one is moving with a velocity V. What will be the velocity of the fluid in contact with the upper plate?

asked Aug 1, 2018 by meena.p

1 answer

Hydrogen diffuses six times faster than gas A The molar mass of gas A is

asked Jul 31, 2018 by meena.p

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In the equation of state of an ideal gas PV = n RT, the value of the universal gas constant would depend only on

asked Jul 31, 2018 by meena.p

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In order to increase the volume of a gas by 10%, the pressure of the gas should be

asked Jul 31, 2018 by meena.p

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If a gas expands at constant temperature, it indicates that:

asked Jul 31, 2018 by meena.p

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How large a balloon could you fill with $4\;g$ of He gas at $22^{\circ}C$ and 720 mm of Hg?

asked Jul 31, 2018 by meena.p

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A gas occupies one litre under atmospheric pressure. What will be the volume of the same amount of gas under 750 mm of Hg at the same temperature?

asked Jul 31, 2018 by meena.p

1 answer

Which sample demonstrates particles arranged in a regular geometric pattern?

asked Jul 31, 2018 by meena.p

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The amount of energy needed to change a substance from a solid phase to a liquid phase is __________ .

asked Jul 31, 2018 by meena.p

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A sample of wustite $Fe_xO$ contains one Fe(III) for every three Fe(II).Calculate the value of $x$

asked Jul 16, 2014 by sreemathi.v

1 answer

Calculate the radius of molybdenum atom if the element crystallizes as body-centred cubic crystals.Given : Density of $Mo=10.3gcm^{-3}$ and molar mass of $Mo=95.94gmol^{-1}$ .

asked Jul 16, 2014 by sreemathi.v

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A metal crystallizes in two cubic phases FCC and BCC with unit length equal to 350 pm and 300 pm. The ratio of densities of FCC and BCC is about?

asked Jul 15, 2014 by balaji.thirumalai

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The density of crystalline sodium chloride is $2.165g cm^{-3}$ . What is the edge length of the unit cell.

asked Apr 9, 2014 by sharmaaparna1

1 answer

What is the pressure of HCl gas at $-40^{\large\circ}C$ if its density is $8.0 kgm^{-3}? (R = 8.314 JK^{-1}mol^{-1})$

asked Apr 8, 2014 by sharmaaparna1

1 answer

The average kinetic energy of 1.6 g $CH_4$ molecules at $27^{\large\circ}C$ is:

asked Apr 7, 2014 by sharmaaparna1

1 answer

The Vacant space in body centered cubic lattice b.c.c unit cell is about

asked Feb 27, 2014 by sharmaaparna1

2 answers

The density (in $gml^{-1}$) of a 3.60M sulphuric acid solution that is 29% $H_2SO_4$.(Molar mass=98$gmol^{-1}$) by mass will be

asked Jan 7, 2014 by sreemathi.v

1 answer

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