A particle that contains 9 protons, 10 neutrons and 10 electrons is a
Ethyne is passed through a hot tube containing organo−nickel catalyst to produce
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 presence of impurity in a substance will cause the melting point to _____
The process that requires the use of hardwater in its operation is
The value of an equilibrium constant Kc is 1.5 × 105 at 298K for a certain reaction. What does this indicate about the reaction?
Which of the following is a fine chemical?
The addition of charcoal to a filter bed in a town water supply is for the purpose of _____
The best technique for separating the components of a dye is _____
What is the anode in the extraction of aluminum and what reaction takes place at the anode?
In electrovalent liquids, the rate of evaporation is usually _____
Ethanol is soluble in water due to the presence of a
The petroleum fraction that is used in heating furnaces is _____
Which of the following gases is collected by upward displacement of air?
If 50cm3 of hydrogen is sparked with 75cm3 of oxygen: 2H2 + O2 −> 2H2O, the volume of the unreacted oxygen is _____
What volume of water will be added to 10dm3 of 2moldm−3 to obtain 0.5moldm−3 solution?
The degree of randomness increases from
Which of the following can be used to test for the presence of water in the laboratory?
On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become anhydrous. This phenomenon is referred to as:
The process involved in the conversion of starch to alcohol is _____
In the preparation of which of the following gases is Kipps apparatus used?
The number of Faradays required to deposit 156g of potassium from its salt is _____
[K = 39]
Which of the following gases contains the least number of atoms at s.t.p?
Which of the following statements is correct about the average kinetic energy of the molecules of a gas?
Which of the following pairs are oxidizing agents?
A gas X diffuses twice as fast as gas Y. If the relative molecular mass of X is 32, calculate the molecular mass of Y
The substance often used for vulcanization of rubber is
In a given homologous series, successive members differ in their relative molecular mass by:
How many isomers of C4H9OH will be tertiary alkanol?
Alkanones are generally obtained by the oxidation of
A metal M displaces zinc from zinc chloride solution. This shows that
The alkali metals are never found uncombined with other elements in the earth's crust because they
Copper is used in making electric wire because of its high conductivity and _____
Which of the following gases can be collected over water?
Which of the following is suitable for removing both temporary and permanent hardness?
Which of the following contains particles with the largest size?
The structure of diamond is:
Which of the following has the highest hydroxyl ion concentration?
The relative atomic mass of a naturally occurring lithium consisting 90% 7Li and 10% 6Li is
The method suitable for separating suspended particles in liquid is:
