Which of the following gases could be collected by downward displacement of air?

Which of the following substances has the lowest boiling point?

The branch of science that deals with the nature and properties of substances and how one substance can be converted to another is known as

The most important ore of aluminium is

Bases normally

The product of the reaction between ethanol and excess acidified K₂Cr₂O₇ is

The product formed when concentrated sodium chloride solution is electrolysed using carbon electrodes is

Which of the following statements about ammonium salt is correct?

Ethanedioic acid is an organic solid that can be purified by

Which of the following functional groups is present in alkanoic acid?

In ethanol, the attractive forces between adjacent molecules are

At 25ºC, the saturated solution of a salt in water was found to contain 0.24 g of the salt in 100 cm^3. What is the solubility of the salt in g/dm^3?

Which of the following statements describes transition elements?

Aluminium is suitable for making alloys for aircraft construction because

Which of the following arrangements of elements is in order of increasing ionization energy?

The number of shared pair of electrons in a molecule of methane is

Isotopes of the same element have similar chemical properties because they have the same number of

Which of the following household liquids would be effective in treating someone with too much acid in the stomach?

Catalysts alter reaction rates by

Ethane of volume 400 cm³ was completely burnt in excess oxygen according to the following equation:

2C₂H₆(g) + 7O₂(g) → 6H₂O(g) + 4CO₂(g)

Calculate the volume of steam that would be produced.

A saturated solution at 30ºC will not normally produce crystals at a temperature of

The following organic compounds are polymers except

According to the collision theory of reaction rates, which of the following conditions is not required for two molecules to react?

A weak acid is one which

Which of the following conditions are necessary for the preparation of alkanoates from alkanols and alkanoic acids?

The volume of 22 g of CO₂ at stp is equivalent to [C=12, O=16, molar volume at stp = 22.4 dm³]

Pairs of outermost shell electrons which are not used in bonding are

Pure water contaminated with quicklime will have a pH of

When s and p block elements react, the bond formed is

The hardest form of carbon is

The metallic bonding in aluminium is strong because of large number of

How many covalent bonds are formed by Nitrogen?

When an element exists in two or more forms in the same physical state, it exhibits

An atom of an element in the ground state contains 8 valence electrons. The element is considered as a

The main function of limestone in the blast furnace during the extraction of iron is to

Which of the following is a monomer of polythene?

Which of the following compounds is formed by the oxidation of ethanol?

Tetraoxosulphate (VI) acid is considered as a heavy chemical because

How many isomers can be formed from a compound with molecular formula C₅H₁₂?

The oxidation number of iron in its free state is

Water pipes are produced from