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

Balance the given chemical reaction as per the instructions below.

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

Oxidation means losing electrons then what is reduction?

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.

Answer the questions based on the equation below:

\[\ce{CH3 - CH2 - OH ->[{[O]}][K2Cr2O7/H2SO4] CH3 - COOH}\]

1. What type of reaction is it?
2. What is the role of the chemical written on the arrow?
3. Give one example of one such type of chemical as in answer (b).

In reference to the figure, answer the following questions:

1. What does the figure illustrate?
2. Explain the temperature changes observed in two objects.
3. Write the principle behind this concept.

It is recommended to use air tight containers for storing oil for a long time.

The power of convex lens of focal length 20 cm is ______.

Complete the following reaction:

\[\ce{C_12H_22O11->[Heat]}\] ______ + ______.

Define periods of modern periodic table.

Define groups of modern periodic table.

Distinguish between Concave lens and Convex lens.

Distinguish between:

Concave lens and Convex Lens

Select the appropriate options and complete the following paragraph:

(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).

On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.

Write the molecular formula of calcium carbonate.

Distinguish between Concave lens and Convex Lens.

Distinguish between:

Concave lens and Convex Lens