SSC (Marathi Semi-English) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions for Science and Technology 1

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.

Balance the given chemical reaction as per the instructions below.

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]

Oxidation means losing electrons then what is reduction?

Choose the odd one out and write the reason:

Choose the odd one out and write the reason:

Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':

Identify the type of chemical reaction given below:

\[\ce{2Mg + O2 -> 2MgO}\]

Read the following paragraph and answer the questions based on it.

1. Heat is transferred from where to where?
2. Which principle do we learn about from this process?
3. How will you state the principle briefly?

When hydrogen gas is passed over black copper oxide, a reddish-coloured layer of copper is formed.

Answer the questions that follow based on this reaction.

1. Write the equation.
2. What type of reaction is it?
3. Complete the blanks:
   In this reaction, an oxygen atom goes away from CuO (copper oxide), which means that ______ of copper oxide takes place, whereas a hydrogen molecule takes up an oxygen atom and water (H₂O) is formed, meaning ______ of hydrogen takes place.

1. In which type of microscope do you find the lens arrangement as shown in the following diagram?
   
2. Write about the working and the use of this microscope.

The reaction of calcium carbonate, with freshly prepared lime water, is shown below:

Answer the questions with the help of a diagram:

1. What type of reaction does calcium carbonate undergoes?
2. What change in colour is observed in lime?
3. Write the chemical equation.