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

Answer the following question in your own words.

Write the characteristics of subkingdom Phanerogams. 

Explain the following cycle in your own words with a suitable diagram.

Nitrogen cycle. 

What devices will you use to share with others the knowledge that you have? 

Explain the role and importance of information communication in science and technology.

Identify the odd word and explain why it is odd. 

What is meant by radioactivity?

When is said to be the nucleus unstable?

Give a scientific explanation.

When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path. 

Write two physical properties.

Charcoal 

Deduce the number of molecules of the following compound in the given quantity.

90g water

Deduce the number of molecules of the following compound in the given quantity.

8.8g carbon dioxide

Deduce the number of molecules of the following compound in the given quantity.

7.1 g chlorine

If 0.2 mol of the following substance is required how many grams of that substance should be taken?

magnesium oxide

If 0.2 mol of the following substance is required how many grams of that substance should be taken?

Calcium carbonate

Give two examples from everyday life of the neutralization reaction.

Choose one or more correct alternatives.

Which of the forces involved in dragging a heavy object on a smooth, horizontal surface, have the same magnitude?

1. The horizontal applied force
2. gravitational force
3. reaction force in vertical direction
4. force of friction  

The total energy of an object falling freely towards the ground ______.

Give a reason for the following.

Buttermilk spoils if kept in a copper or brass container.

Write the chemical equation for the following activity.

Zinc dust was added to dilute H₂SO₄. 

Write the chemical equation for the following activity.

Dilute nitric acid was added to calcium oxide.