SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Electric motors are devices that convert electrical energy into mechanical energy.

India is the first country to discover the existence of water on the moon.

Write an Explanation.

Group

Write scientific reason.

Boron and oxygen elements are placed in the second period in periodic table.

In group 2, beryllium and calcium elements, calcium is more electropositive element than beryllium.

Complete the following chart.

Find the period in which these elements can be placed.

₄Be, ₁₇Cl, ₂He, ₁₃Al

Electronic configuration of element A is 2,8,1. Answer the following questions based on this information.

1. What is the atomic number of element A?
2. Find the group to which this element belongs.

What is an electric motor?

In which electric motor appliances do we use it?

Distinguish between:

Group - Period

Write a short note.

Moon missions

Write name of elements, symbol, atomic number, electronic configuration of second period in modern periodic table?

Identify periods of elements and blocks of elements from given electronic configuration?

1. 2, 8, 2
2. 2, 8, 7
3. 2, 1

Observe the given chart and answer the questions given below.

1. Which elements are in the same row?
2. Which elements have the same column?
3. Which elements are in the 18th column?
4. Which element is more reactive among A and C?
5. Which of the following elements A or B will form compounds?

XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.

1. Determine the position of the element X and Y periodic table.
2. X and Y belongs to which of the following: metals, nonmetals or metalloids?
3. From which block the elements X and Y are?
4. Determine the electronic configuration and valency of these elements.

Observe the periodic table given below and write the answers of the questions.

1. Write the name and valencies of the elements in 3rd row.
2. Classify the elements in this row as metal, nonmetal and metalloids.
3. Which block does nonmetals belong to?
4. Write name of any two metalloid elements.

Make a chart which shows the name of the element, valency, atomic number, electronic configuration in the 2nd row of the modern periodic table and arrange these elements in ascending order of atomic mass.

Observe the figure and write the answers to the questions asked.

1. The construction shown in the figure is of which device?
2. Explain the principle on which this device works.
3. Write any three uses of this device.

State whether true or false. If false, correct the statement.

A generator converts mechanical energy into electrical energy.