Which of the following is exothermic?
Ethene is prepared industrially by _____
Butter is an example of emulsion in which
The number of electronic shells obtained in an atom with electron configuration 1s22s22p63s23p64s2 is _____
Which of the following statements is correct about the average kinetic energy of the molecules of a gas?
The method commonly used in the preparation of insoluble salts is:
If 50cm3 of hydrogen is sparked with 75cm3 of oxygen: 2H2 + O2 −> 2H2O, the volume of the unreacted oxygen is _____
The number of Faradays required to deposit 156g of potassium from its salt is _____
[K = 39]
Powdered marble reacts faster with hydrochloric acid solution than the granular form because the powdered form has
Sodium hydroxide can be used
If the difference in electronegativity of elements P and Q is 3.0, the bond that will be formed between them is
What is the IUPAC name of the compound C6H5OH?
The purity of common salt (NaCl) can be determined by _____
Which of the following will liberate hydrogen from dilute tetraoxosulphate (VI) acid?
Cast iron is used in making
In the electrolytic extraction of calcium from calcium chloride, the cathode is _____
Catalytic hydrogenation of benzene produces
In electroplating steel with chromium, the cathode is:
The process that requires the use of hardwater in its operation is
Which of the following constitutes the least environmental pollution?
The gas that can best be collected by downward displacement of air is
The constituent common to duralumin and alnico is
On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become anhydrous. This phenomenon is referred to as:
An example of homogeneous mixture is:
When chlorine Is passed into water and the resulting solution exposed to sunlight, the product formed are
The alkali metals are never found uncombined with other elements in the earth's crust because they
The maximum oxidation state of chlorine in its oxoacids is exhibited in:
The degree of randomness increases from
Which of the following statement is/are true? (I) H2SO4 is a strong electrolyte (II) CH3COOH is a weak electrolyte (III) Aluminium conducts electricity (IV) C6H12O6 is a non−electrolyte
Which of the following organic compounds will decolorize both bromine water and acidified KMnO4?
The chlorinated alkane often used industrially to remove grease is
The element X that can combine with oxygen to form an oxide of the form XO2 is _____
A compound that gives a brick−red colour to a non−luminous flame is likely to contain _____
Ethanol reacts with methanoic acid to give an:
An important ore of aluminium is _____
Aldehydes differ from ketones in their:
Ethyne is passed through a hot tube containing organo−nickel catalyst to produce
CHCl3 + Cl2 −> HCl + CCl4
The reaction above is an example of?
The pollutant that contributes to the depletion of the ozone layer is
Fluorine does not occur in the free state in nature because
