Questions
Pollutants of a city are shown in the given diagram.
- Which pollutants of them is non biodegradable?
- How can we manage such pollutants?
A ray of light is passed inside the prism.
- Find the value of $\rm \theta _1$.
- What will be the direction of ray after Q?
Characteristics of some plants are given below.
a. Number of petals is 4 or 5 or in their multiples.
b. Needs water for reproduction
c. Has undifferentiated root and stem
d. Has feather like leaves.
- Rearrange the characteristics in ascending order of evolution.
- Identify the group of aquatic plant from above and classify.
Prove that unit of gravitational constant is derived unit.
What is the IUPAC name of a hydrocarbon formed by replacement of two hydrogen atoms by two-hydroxyl group from each carbon atom and write structural formula of that compound too.
What happens when carbon dioxide reacts with water? Also, write balanced chemical equation.
Convert the following incomplete word equation into balanced formula equation.
Magnesium + Oxygen $\rm\rightarrow \dots \dots $
A figure of balloon is given alongside.
- How will you demonstrate Big Bang theory by using it?
- How does the demonstration also support the conclusion of Hubble's study?
The people of a village have low economic condition but they grow flowers and agricultural products. If you were chairman of a ward in that village, what would you suggest to improve their economic condition by cultivating which insect? Write any two reasons.
We should use and store pesticides carefully. Write two reason behind this.