SSC (English Medium) 10th Standard - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Rewrite the following statements by selecting the correct options:
\[\ce{CaCO3 ->[\Delta] CaO + CO2 ^}\] is a __________ reaction.

What is a solenoid?

Let the period of revolution of a planet at a distance R from a star be T. Prove that if it was at a distance of 2R from the star, its period of revolution will be \[\sqrt{8}\] T.

Give a scientific reason.

When the gas formed on heating limestone is passed through freshly prepared lime water, the lime water turns milky.

Fill in the blank and explain the statement with reasoning:

The initial velocity (during launching) of the Managalyaan, must be greater than ______ of the earth.

State with reasons whether the sentence is  true or false.

If a spacecraft has to be sent away from the influence of earth’s gravitational field, its velocity must be less than the escape velocity.

State with reasons whether the sentence is  true or false .

The escape velocity on the moon is less than that on the earth.

State with reasons whether the sentence is  true or false .

 A satellite needs a specific velocity to revolve in a specific orbit.

State with reasons whether the sentence is  true or false .

 If the height of the orbit of a satellite increases, its velocity must also increase.

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

Why it is beneficial to use satellite launch vehicles made of more than one stage?

Identify the type of following reaction :

Identify the law shown in the figure and state three respective laws.

Balance the following equation stepwise.

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

Study the following figure and answer questions. 

a) After heating Calcium carbonate, which gas is formed in a test tube?
b) When we pass this gas through limewater what change, did you observe?
c) Write down the chemical reaction showing the product formation after heating the Calcium carbonate.

How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?

The vapour content in the air is measured using a physical quantity called ____________.

Observe the given figure showing the orbit of a planet moving around the Sun and write the three laws related to it:

The orbit of a planet moving around the Sun

The orbit of a planet revolving around a star is _______.