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Chemistry

20:00

Which of the following is exothermic?

1. 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