SSC (English Medium) 10th Standard - Maharashtra State Board Question Bank Solutions

A ball falls off a table and reaches the ground in 1 s. Assuming g=10 m/s^2, calculate its speed on reaching the ground and the height of the table.

Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process.
The iron rust is formed due to........................... reaction. Different
regions on iron surface become anode and cathode.
 Reaction on anode region :

`F_e(s) → Fe^(2+) (aq) +2e^-`

 Reaction on anode region :

`O_2(g) + 4H^+(aq) +............................ → 2H_2 O (l) `

When Fe²⁺ ions migrate from anode region they react with ................... to form Fe³⁺ ions.
A reddish coloured hydrated oxide is formed from ............... ions. It is called rust.

`2Fe_(3+) (aq) + 4H_2O(l) → ................. + 6H_+(aq) `

A way to prevent rusting ..................................................................

i) If g = GM/r² then where will the value of g be high at Goa Beach or on top of Mount Everest? 

iii) Observe the figure and answer the following questions.
a) Identify the block shown by box A and write an electronic configuration of any one element of this block.
b) Identify the block of element denoted by letter B and write its period number.

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

For freely falling object we can write the Newton’s second equation of motion as …..

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:

A metal ball of mass 5 kg falls from a height of 490 m. How much time it will take to reach the ground? (g = 9.8 m/s²)

What would be the value of ‘g’ on the surface of the earth if its mass was twice and its radius half of what it is now?

What is the acceleration due to gravity?

What is escape velocity? 

Choose the correct alternative and rewrite the following:

Mirror used by a dental surgeon is ..........................

Explain ‘Electric generator’ with the help of the following points:

1. Diagram of an AC Generator with labelling
2. Principle of an electric generator
3. The function of slip rings
4. Any two uses of a generator.

Answer the following question:
Distinguish between the convex mirror and the concave mirror.

Choose the correct alternative and rewrite the following:

Iron is _____________________.

Answer the following question:
What is corrosion? Do gold ornaments corrode? Justify.

Write a short note on Alloying.

Observe the following picture and answer the following questions:

1. What is rust?
2. Write the chemical formula of rust.
3. Write the reaction of oxidation of iron at the anode.
4. Write the reaction of oxidation of iron at the cathode.
5. What is corrosion?