List of top Science & Technology Questions

What is done to prevent rusting of iron door of your house?
Name and state the principle used to measure the specific heat capacity of a substance.
While going from left to right within a period, the size of the atom decreases.
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.
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.
Light changes its direction when going from one transparent medium to another transparent medium. This process is called ...................... .
.................... is used to make a solenoid type coil in an electric bulb.
The reaction in which ions in the reactants are exchanged to form a precipitate is called as ...................... reaction.
Choose the correct alternative:
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in .................... .