Question

1- List any two common methods by which solid wastes of urban areas are dispoed off. 2- Name the two elements which are present both in CNG and Petroleum. 3- What is the position of hydrogen in the model periodic table?

Answer 1

1- dumping... burning.., 2-carbon .. oxy...3- 1st..in modern priodc tbl

Answer 2

2- butane 2 are found in cng gas and mainly element are found in H ' O 3- hydrogen is 1st element of modern periodic table