List of top Science Questions

Which of the following metals is displaced from its salt solution by iron?
What is the chemical formula of quicklime?
The commercial production of ethyl alcohol is done by which chemical process?
An aqueous solution of ammonium chloride is:
Which one of the following is a covalent compound?
What is a food chain? Explain it with an example.
When magnesium ribbon is ignited, the flame produced by it is:
Zn + CuSO$_4$ $\rightarrow$ ZnSO$_4$ + Cu, the above reaction is an example of:
The chemical substance used as a cast for setting broken bones in surgery is:
On moving from right to left across the period of the modern periodic table, the atomic size:
The molecular formula of ethane is C$_2$H$_6$. It has:
Draw a labelled diagram of human digestive system and explain the digestive process of food.
What is bio-magnification?
Write the importance of reproduction in living beings.
Explore the difference between blood and lymph.
What is external respiration?
Why do we sweat in summer?
What is photosynthesis? Write the equation of its chemical reaction.
What is the role of stomata and lenticels in respiration?
What is ascent of sap?
What is the effect of deforestation on wildlife?
What is Anodising?
Write two differences between minerals and ores.
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
Name the sodium compound which is used for softening hard water.