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

To the left of the zig-zag line in the periodic table are the metal elements.

The K and L shells of the elements Na and Mg contain electrons.

The power of the magnifying glass depends on the distance of the magnifying glass from object.

Write an Explanation.

Period

Write scientific reason.

There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.

Write scientific reason.

Lithium and sodium are included in the same group in periodic table.

Write scientific reason.

Adults need bifocal lens spectacle.

Complete the following flow chart.

In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.

Explain the following reaction with their balanced chemical equation.

Hydrogen sulphide reacts with sulphur dioxide.

Distinguish between:

s-block - p-block

Distinguish between:

Group 17 - Group 18

An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.

1. Which element has more metallic character from these two elements?
2. What is the valency of each X and Y elements?
3. Atom size of Y element is smaller than atom size of X element. Explain.

Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.

1. What is A element metal or nonmetal?
2. Which is the outermost orbit of element B?
3. Identify C element and it's physical state.

What is electrolysis?

Explain the reaction given in the figure.

Find the power of a convex lens of focal length of + 25 cm.

If focal length of a convex lens is 20 cm at what is the power of the lens?

Observe the given figure and answer the following questions.

1. Where is the above type of lens construction used?
2. What type of image is formed by an objective lens?
3. What happens instead of placing at F_o if the object is placed in between O and F_o?

Explain structure of modern periodic table in short.