SSC (English Medium) इयत्ता १० वी - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Observe the following diagram and give answers.

1. Name this method of prevention of corrosion.
2. For prevention of which metal this method is used?
3. What is used as anode in this method?

Observe the following diagram and write answers.

1. Name the method.
2. Explain the method.
3. Give two examples of this method.

Complete the following activity.

Read the given passage carefully and answer the questions.

We know that the force of gravity due to the earth acts on each and every object. When we were holding the stone in our hand, the stone was experiencing this force, but it was balanced by a force that we were applying on it in the opposite direction. As a result, the stone remained at rest. Once we release the stone from our hands, the only force that acts on it is the gravitational force of the earth and the stone falls down under its influence. Whenever an object moves under the influence of the force of gravity alone, it is said to be falling freely. Thus the released stone is in a free fall. In free fall, the initial velocity of the object is zero and goes on increasing due to the acceleration due to the gravity of the earth. During free fall, the frictional force due to air opposes the motion of the object and a buoyant force also acts on the object. Thus, true free fall is possible only in a vacuum.

1) Complete the following statement by choosing the right option.

The stone held in the hand is stable because on it __.

1. two unbalanced forces are exerted.
2. only the gravitational force of the earth is exerted.
3. gravitational force of the earth is not exerted.
4. two balanced forces are exerted.

2) Why does free fall not happen on the earth?

3) Why does the velocity of the object increase during the free fall?

4) Which type of force exerts on the object during free fall?

5) Why does free fall happen only in a vacuum?

Observe the following figure and write the answer of the question.

1. Which process is shown in the figure?
2. Explain the chemical reaction shown in the figure.
3. Write the reactions on anode and cathode.

Give preventive methods by giving examples of corrosion?

Gold plated ornaments is the example of ______.

Give scientific reasons.

Silver amalgam is used for filling dental cavities.

Answer the following questions based on the given graph.

1. Identify which curve shows AC and DC.
2. What is the frequency of AC and DC?

Explain the chemical reactions in rusting of iron.

Complete the correlation:

DC : Non-oscillatory current flowing in one direction : : AC : ______

1. Name the anode and electrolyte used in this technique.
2. How can we make aluminium articles made resistant to corrosion?
3. Name the technique used to coat the aluminium articles.

______ react with dil. HNO₃ to evolve hydrogen gas.

Calculate the escape velocity on the surface of the moon given the mass and radius of the moon to be 7.34 × 10²² kg and 1.74 × 10⁶ m respectively.

(Given: G = 6.67 × 10^-11 Nm²/kg²)

In ______ process a layer of molten tin is deposited on metals.

When is free fall possible?

What is an oxidising agent? 

Write the name and symbol of the element from the description.

The most electronegative atom.

Write the name and symbol of the element from the description.

The most reactive nonmetal.

Write the name from the description.

The family of nonmetals having valency one.