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

Write the harmful effects.

Deodorant 

Explain what you see in the following picture.

A 10 cm long stick is kept in front of a concave mirror having a focal length of 10 cm in such a way that the end of the stick closest to the pole is at a distance of 20 cm. What will be the length of the image?

Complete a sentence and explain it.

When an object is in uniform circular motion, its ______ changes at every point.

Write the steps in deducing the chemical formulae of the following compound.

Sodium sulphate

M is a bivalent metal. Write down the steps to find the chemical formulae of its compounds formed with the radicals, sulphate and phosphate.

Explain with suitable examples, the care to be taken when using the methods of transporting patients.

Write note.

Principles of first aid. 

How is first aid provided to victims of disasters who are injured? 

Explain the following. 

Use of CO₂ in fire extinguisher. 

A convex mirror has a focal length of 18 cm. The image of an object kept in front of the mirror is half the height of the object. What is the distance of the object from the mirror?  

An object of height 7 cm is kept at a distance of 25 cm in front of a concave mirror. The focal length of the mirror is 15 cm. At what distance from the mirror should a screen be kept so as to get a clear image? What will be the size and nature of the image?

Write the steps in deducing the chemical formulae of the following compound.

Potassium nitrate

Write the steps in deducing the chemical formulae of the following compound.

Ferric phosphate

Write the steps in deducing the chemical formulae of the following compound.

Calcium oxide

Write the steps in deducing the chemical formulae of the following compound.

Aluminium hydroxide

Take 5 examples from your surroundings and give an explanation based on Newton's laws of motion.

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

Dilute H₂SO₄ was taken in an electrolytic cell and an electric current was passed through it.

Explain the following.

Methane is called marsh gas.

Explain what is meant by electrolysis of water. Write the electrode reactions and explain them.