temporary withdrawal or cessation from the usual work or activity. 2. a period of such withdrawal. 3. a receding part or space, as a bay or alcove in a room. 4. an indentation in a line or extent of coast, hills, forest, etc.
The most simple alkane is methane with the formula CH4. The second alkane is ethane with the formula C2H6. The general formula of alkanes is CnH2n+2. The first four alkanes are methane (CH4), ethane (C2H6), propane (C3H8) and butane (C4H10). The simplest alkane is the gas methane, whose molecular formula is CH4. Methane exists as a tetrahedral shape, but it is often represented by a flattened structure as are most organic compounds. Flattened structures for the three simplest alkanes are given in the Figure below.
Molecular formula = CH4 Molecular mass = 16 Empirical formula = CH4 Empirical formula mass = 16 State: Gas at room temperature. Occurrence: marsh, stagnant ponds. It is the major constituent of natural gas. Natural gas contains 94.6% methane.ue to this property, methane is used as a domestic and industrial fuel. CH4 + 2O2 CO2 + 2H2O HALOGENATION: Replacement of halogen atom with H-atom of an organic compound is called Halogenation. It is a substitution reaction. This reaction occurs in the presence of sun light. It is a free radical mechanism eaction.