SSC (Marathi Semi-English) 9th Standard [इयत्ता ९ वी] - Maharashtra State Board Question Bank Solutions for Science and Technology

Explain the concept of tissue culture.

Give example.

Positive radicals

Give example.

Basic radicals

Give example.

Composite radicals

Give example.

Bivalent acidic radicals

Give example.

Trivalent basic radicals

Write symbols of the following elements and the radicals obtained from them and indicate the charge on the radicals.

Mercury, potassium, nitrogen, copper, sulphur, carbon, chlorine, oxygen

Identify the odd one out and justify.

Write down the changes that will be seen in the instance and explain the reason behind them. 

50 ml water is added to 50 ml solution of copper sulphate.

Write down the changes that will be seen in each instance and explain the reason behind them. 

Pieces of blue vitriol were heated in a test tube. On cooling, water was added to it.

Explain with suitable examples, the relationship between weather forecasting and disaster management.

Write the use.

Powder coating 

Write the use. 

Anodizing 

The chemical name of Teflon is ______.

Which diseases are caused by artificial food colours?

Write down properties of teflon. 

What type of colours will you use to celebrate ecofriendly Rang Panchami? Why?

Why has the use of methods like Teflon coating become more common?

Give a scientific explanation.

The particles of powder are given an electric charge while spraying them to form the powder coating.

Give a scientific explanation.

The aluminium article is used as an anode in the anodizing process.