List of top Science Questions

Write one example on:
Fragmentation

Write one example on:
Fission

What happens when - (Write only balanced chemical equation):
Ethane is allowed to burn in air

What happens when - (Write only balanced chemical equation):
Ethanol reacts with ethanoic acid in presence of concentrated \( H_2SO_4 \)

What happens when - (Write only balanced chemical equation):
Ethanoic acid reacts with sodium bicarbonate

What happens when - (Write only balanced chemical equation):
Ethanol reacts with excess of concentrated \( H_2SO_4 \) at 160°C to 170°C

What happens when - (Write only balanced chemical equation):
Dry chlorine gas reacts with dry slaked lime

What happens when - (Write only balanced chemical equation):

Sodium oxide reacts with water

Write short notes on:
Reduction reaction

Write short notes on:

Neutralisation reaction

Write short notes on:
Budding 
 

Write short notes on:
Functions of thyroxine hormone 
 

Write balanced equation:
Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride
 

Write short notes on :
Double displacement reaction 
 

Write short notes on :
Neutralization reaction 
 

Explain the reason for the following: 
(i) On putting a zinc rod in copper sulphate solution, its blue colour vanishes slowly.
(ii) Ionic compounds have high melting points.

Write short notes on the following: 
(i) Homologous series
(ii) Versatile nature of Carbon

Write short notes on:
Addition reaction 
 

Write IUPAC names of the following compounds:
Structure: 

Write IUPAC names of the following compounds:
Structure: 

Show by making a diagram for the magnetic lines of force around a bar magnet.
Choose the correct alternative by matching the physical quantities in column (B) with the units in column (A): \[ \begin{array}{|l|l|} \hline \textbf{A} & \textbf{B} \\ \hline (1) \text{Ohm} & (ii) \text{Electric resistance} \\ \hline (2) \text{Watt} & (iii) \text{Electric power} \\ \hline (3) \text{Ampere} & (i) \text{Electric current} \\ \hline (4) \text{Volt} & (iv) \text{Electric potential difference} \\ \hline \end{array} \]
What is short-sightedness (myopia)? Explain with a ray diagram. This defect is corrected by which type of lens?
Explain the difference between magnet and current carrying solenoid.
Differentiate between self-pollination and cross-pollination.