P-2 Introduction to Microbiology — Science STD 10 — Question

Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds

A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound.

What is DNA fingerprinting? Where is mainly useful?

A boy with a mouth 5cm wide stands 2m away from a plane mirror. Where is his image and how wide is the image of his mouth?

Write the laws :
Specific heat capacity

When the material A mined from the earth is heated strongly in an insufficient supply of air, it produces a solid fuel B which consists mainly of carbon. When another material C obtained from trees is heated in an insufficient supply of air, it produces another solid fuel D which also consists mainly of carbon. Name A, B, C and D.

P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:

1. Blue litmus red?
2. Red litmus blue?

What would happen to the number of rabbits and grass plants if the number of foxes:

1. Increased?
2. Decreased?

Write the characteristics with reference to their classification:
Elephant:

Distinguish between: Glycolysis and TCA cycle