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Which of the following sketches is a graphical representation of Boyle's law?
Which of the following scientists formulated the law of conservation of mass?
The first definition of an element was made by
Charcoal is used in the decolourization of sugar because of its
If the molar mass of X(HCO3)\(_{2}\) is 162 g mol\(^{-1}\), determine the relative atomic mass of X.
[H = 1.0, C = 12.0, 0 = 16.0]
Which of the following processes occur during fractional distillation of petroleum?
Which of the following oxides is amphoteric?
Consider the following table
| Substitute | Meltig point / ºC | Boiling point / ºC |
| P | - 78 | -25 |
| Q | - 8 | 40 |
| R | - 6 | 150 |
| S | 44 | 280 |
Which of the substances is a liquid at room temperature and rapidly evaporates on exposure to air?
Electropositivity of elements across the periodic table normally
The atom with the electron configuration
1s\(^{2}\)2s\(^{2}\)2p63s\(^{2}\)3p\(^{6}\)3d\(^{10}\)4s\(^{2}\)4p\(^{4}\) is in
Which of the following statements about atoms of a metal is correct? They
An oxide has the following properties. It
I. is a white powder
II. reacts with HCI.
III. reacts with NaOH
IV. is insoluble in water
The oxide is
The electron configuration of carbon atom in its excited state is
Which of the following properties indicate that an element is a metal. It
I. reacts with oxygen to form an acidic oxide
II. forms ionic chlorides
III. has variable oxidation states
IV. displaces hydrogen from dilute HCl
Ionization energy increases across the period in the periodic table because
The IUPAC name of the compound CH3CH(CH3)CHCH2 is
The maximum number of covalent bonds formed by nitrogen is
Which of the following bond types is intermolecular?
What is the percentage composition of carbon
in Ca(HCO3)\(_{2}\) ?
[ Ca = 40.0, 0= 16.0, C = 12.0, H= 1.0]
Which of the following elements would displace copper from a solution of copper ions?