SSC (Marathi Semi-English) १० वीं कक्षा - Maharashtra State Board Important Questions for Science and Technology 2

Write two methods of preventing the rusting of iron.

What is anodising? Give its applications.

In the extraction of aluminium: Draw the diagram for the extraction of aluminium.

In the extraction of aluminium: Why is it necessary to replace anodes time to time?

Identify the process shown in the diagram and explain it in short

Answer the following question.
a) What is meant by corrosion?
b) Write names of any two methods of prevention of corrosion.
c) In which method, metal like copper, aluminium are coated with a thin layer of their oxides by means of electrolysis.
d) Explain this method with diagram.

Find the odd man out:

Choose the correct alternative and rewrite the following:

Iron is _____________________.

Write three methods of preventing rusting of iron.

Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.

Name one metal each occurring as :  
A sulphine

Name one metal each occurring as :
A carbonate

Name one metal each occurring as :  
An oxide

Suggest measures to minimize electricity consumption at home.

Write any two measures to conserve water.

Explain the disadvantages of a large family size.

Solar water – heater works on renewable energy system

State any four objectives of sustainable development.

Examples of recycling of waste.

State two advantages of recycling.