The petroleum fraction that is used in heating furnaces in industries is _____
The partial pressure of oxygen in a sample of air is 452 mm Hg and the total pressure is 780 mm Hg. What is the mole fraction of oxygen?
The equilibrium constant Kc is affected by:
Which of the following gases contains the least number of atoms at s.t.p?
In a given homologous series, successive members differ in their relative molecular mass by:
In the process of silver−plating metal X
The alloy of aluminium used in the construction of aircraft is _____
The gas that can best be collected by downward displacement of air is
Ethanol reacts with methanoic acid to give an:
Given that M is the mass of substance deposited in an electrolysis and Q the quantity of electricity consumed, then Faraday's law can be written as
If 50cm3 of hydrogen is sparked with 75cm3 of oxygen: 2H2 + O2 −> 2H2O, the volume of the unreacted oxygen is _____
Under high pressure, real gases do not obey gas laws because their molecules:
The petroleum fraction that is used in heating furnaces is _____
In an electrochemical cell, polarization is caused by _____
The condition required for corrosion to take place is the presence of
In the preparation of which of the following gases is Kipps apparatus used?
Which of the following is exothermic?
The following are miscible with water except _____
Deliquescent substances are used for
Copper is used in making electric wire because of its high conductivity and _____
The flame used in welding and cutting of metals is:
The method suitable for separating suspended particles in liquid is:
The chlorinated alkane often used industrially to remove grease is
The use of hydrogen gas to fill balloons for both meteorological and other scientific purposes is limited by its _____
The compound produced when sodium peroxide is heated with excess sodium is
Acidic industrial wastes can be treated with
Cast iron is used in making
Alkanones are generally obtained by the oxidation of
Ethanol is soluble in water due to the presence of a
The alkanol obtained from the production of soap is _____
The enthalpies of neutralization for reactions between strong acids and alkalis are usually
What changes sodium hydroxide pellets to liquid?
What is the oxidation number of chromium in K2Cr2O7 ?
The addition of charcoal to a filter bed in a town water supply is for the purpose of _____
What volume of water will be added to 10dm3 of 2moldm−3 to obtain 0.5moldm−3 solution?
Which of the following will have the least melting point?
The alkali metals are never found uncombined with other elements in the earth's crust because they
The number of electronic shells obtained in an atom with electron configuration 1s22s22p63s23p64s2 is _____
Which of the following organic compounds will decolorize both bromine water and acidified KMnO4?
The best technique for separating the components of a dye is _____
