List of top Science and Technology Questions asked in Maharashtra Class X Board

The non-metallic substance which is a good conductor of electricity.
A sound is produced when certain metals are struck. Name this property of metals.
The two metals which can be cut with knife.
What does a small droplet of water act as?
Name any two natural processes involved in formation of rainbow.
What happens when copper reacts with concentrated nitric acid? What is the colour of the gas released during the reaction?
Write its balanced chemical equation.
Write the names of reactants and products.
The atom having smallest atomic mass.
The noble gas with the smallest atomic radius.
Time taken by the ball to reach the ground.
Velocity of the ball on reaching the ground.
The most electronegative atom.
What is done to prevent rusting of iron door of your house?
Name the launcher.
Name the law on which its working is based.
In some countries, ethanol is used as an additive to increase the efficiency of petrol.
For electric power transmission, copper or aluminium wire is used.
While going from left to right within a period, the size of the atom decreases.
Name the behaviour of water between its temperature from 0°C to 4°C.
Match the columns: Column ‘A’ Column ‘B’ Simple microscope used to observe minute objects
used to see distant objects
used for watch repair
What is the reason for twinkling of stars?
Find the odd one out:
Loudspeaker, microphone, electric motor, magnet.
CaO + H$_2$O $\rightarrow$ Ca(OH)$_2$ + Heat is an example of ................. reaction.
State whether true or false:
A redox reaction takes place during cellular respiration.
.................... is used to make a solenoid type coil in an electric bulb.
Light changes its direction when going from one transparent medium to another transparent medium. This process is called ...................... .