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How many covalent bonds are formed by Nitrogen?
The metallic bonding in aluminium is strong because of large number of
The hardest form of carbon is
When s and p block elements react, the bond formed is
The electron configuration of \(_{29}\) Cu is
Pure water contaminated with quicklime will have a pH of
\(_8\)X\(^{2-}\) and \(_{10}\)Y are
Pairs of outermost shell electrons which are not used in bonding are
The volume of 22g of CO\(_2\) at stp is equivalent to [C =12, O =16, molar volume at stp = 22.4 dm\(^3\) ]
Which of the following conditions are necessary for the preparation of alkanoates from alkanols and alkanoic acid?
A weak acid is one which
According to the collision theory of reaction rates, which of the following conditions is not required for two molecules to react? The molecules must
The following organic compounds are polymers except
A saturated solution at 30\(^0\)C will normally produce crystals at a temperature of
Ethane of volume 400 cm\(^3\) was completely burnt in excess oxygen according to the following equation:
2C\(_2\)H\(_6\)\(_(g)\) + 7O\(_2\)\(_(g)\) → 6H\(_2\)O\(_(g)\) + 4CO\(_2\)\(_(g)\)
Calculate the volume of steam that would be produced.
Catalysts alter reaction rates by
The percentage by mass of Oxygen in MgSO\(_4\).7H\(_2\)O is [ M\(_r\) of MgSO\(_4\).7H\(_2\)O = 246 ]
Which of the following household liquids would be effective in treating someone with too much acid in the stomach?
Isotopes of the same element have similar chemical properties because they have the same number of
The number of shared pair of electrons in a molecule of methane is