SSC (English Medium) 10th Standard - Maharashtra State Board Important Questions for Science and Technology 1

Bubbles are seen in the test tube during the preparation of lime water.

______ react with dil. HNO₃ to evolve hydrogen gas.

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

Complete the following flow chart:

______ is the functional group of carboxylic acid.

Observe the diagram given below and answer the questions:

1. Name the reactants in this reaction.
2. Which gas comes out as effervescence in the bigger test tube?
3. What is the colour change in the lime water?
4. In the above experiment instead of sodium carbonate which chemical can be used to get same products?
5. Write the use of acetic acid.

Identify the hydrocarbon from the given electron-dot structure:

\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{....}\ce{H}\phantom{}\\
\phantom{}\ce{H}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{\overset{\bullet\phantom{.}\bullet}{\underset{\bullet\phantom{.}\bullet}{C}}}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{\overset{\bullet\phantom{.}\bullet}{\underset{\bullet\phantom{.}\bullet}{C}}}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{H}\phantom{}\\
\phantom{}\ce{H}\phantom{....}\ce{H}\phantom{}\\
\end{array}\]

What is meant by an artificial satellite? How are the satellites classified based on their functions?

Why are geostationary satellites not useful for studies of polar regions?

What is meant by satellite launch vehicles? Explain a satellite launch vehicle developed by ISRO with the help of a schematic diagram.

Complete the following table.

Considering first correlation, complete the second.
Hubble telescope : At 569 km above the earth’s surface
Orbit of Hubble telescope : .............................

What are space expeditions? Explain their need and importance in your words. 

Mahendra and Virat are sitting at a distance of 1 metre from each other. Their masses are 75 kg and 80 kg respectively. What is the gravitational force between them? G = 6.67 x 10^-11 Nm²/kg² 

Write the importance of artificial satellites in your words.

Choose and write the correct option. 

Which of the following astronauts travelled through space shuttle ‘Discovery’ first time?

Write the proper name of the orbits of satellites shown in the following figure with their height from the earth’s surface.

By considering first correlation complete the second correlation:

Hubble telescope: 569 km high from the earth surface

Revolving orbit of Hubble telescope: ______

What is meant by space debris?

The astronomical object closest to us is _________ in our galaxy.