Electricity — Science STD 10 — Question

What type of chemical bonds are present in a solid compound which has a high melting point, does not conduct electricity in the solid state but becomes a good conductor in the molten state?

What happens when magnesium reacts with very dilute nitric acid ? Write an equation for the reaction involved.

Complete the following sentence:
Domestic gas cylinders like Indane contain mainly _______.

Answer the following:
Blood sugar level rises due to deficiency of which hormone?

Name the information source for making proteins in the cells.

Give one example each of the compounds having the following functional groups:

1. Alkene group.
2. Alkyne group.

Consider a food chain of the following: Fish, crab, phytoplankton, shark. Arrange the above chain in the proper order of trophic level.

What is the significance of emulsification of fats?

Name the phenomenon which is made use of in an electric generator.

Name the hardest natural substance known.