Tetravalancy of carbon | class 10

Tetravalency of carbon is possible in the case of

Explain the 'unique nature of carbon atom' with reference to - a] 'Tetravalency' - of carbon b] 'Catenation' - leading to formation of single, double & triple bonds and straight chain, branched chain & cyclic compounds.

Arithmetic progression | class 10 | Exercise 5.1 |

The carbonate of a metal is isomorphous with MgCO_(3) and contains 10.34 percent of carbon. Atomic mass of metal will be:

Tendency of carbon for catenation is because carbon-carbon atoms bond energy is

Tendency of carbon for catenation is because carbon-carbon atoms bond energy is

One tonne of air contains 2 xx 10^(-3) g of carbon as smoke. Calculate the concentration of carbon in ppm in air.

Copper and carbon wires are connected in series and the combined resistor is kept at 0^(@)C . Assuming the combined resistance does not vary with temperature the ratio of the resistances of carbon and copper wires at 0^(@)C is (Temperature coefficient of resistivity of copper and carbon respectively are 4xx(10^(-3))/( ^(@)C) and -0.5xx(10^(-3))/( ^(@)C)

In a frequency distribution, the mid values of a class is 10 and width of the class is 6 . The lower limit of the class is

While calculating mode the following observation are found. Lower limit of modal class =40, frequency of modal class =20, frequency of previous class =12 , frequency of preceding class =11 and width of the class =10, find mode .