List of top Social Science Questions on Lifelines of National Economy asked in Bihar Board X

Explain the major National waterways of India.
Which is the longest National waterway ?
State the causes of drought.
What is the 12th schedule of the constitution related to?
How many other languages are recognized as scheduled languages by the constitution besides Hindi?
In which country was the foundation of political parties laid for the first time?
When was the West Indies Federation established?
Define satellite communication.
Which of the following is the headquarters of North Central Railways?
When did All India Radio start?
Which state has the first position in terms of length of roads in India?
Which of the following is a first-aid equipment?
Which of the following ports is not located on the eastern coast?
Who started Radio broadcasting in India?
Which of the following is not the headquarters of any railway zone?
Which of the following is the largest tea exporting port in India?