How does sprinking of salt help in clearing the snow covered roads in hilly areas? Explain the phenomenon involved in the process.

How does sprinkling of salt help in clearing the snow covered roads in hilly areas? Explain the phenomenon involved in the process.

How does sprinkling of salt help in clearing snow covered roads in hilly areas? Explain the phenomenon involved In the process.

CaCl_(2) is used to clear snow from roads on hill stations, explain.

How has biotechnology been useful in controlling nematode infection in plants ? Explain the technique involved in this process.

Sand is thrown on tracks covered with snow in hilly areas. Why ?