Q. the intrinsic semiconductor at room temperature is

Q. I heard that magnesium is found in plants. In what form is it found in them ?

Q. What is the plural of “proof”?

Q. Write the steps you would use for making tea. Use the words solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue.

Q. Give two uses of coal.

Q. Rewrite the following sentences in the ways instructed :(i) The gobar gas obtained by processing dung is used as fuel. (Rewrite the sentence beginning with ‘People……..’.)(ii) The consumption of milk in both urban and rural areas has risen sharply. (Rewrite the sentence using the past perfect tense)(iii) The milk processing industry is a small one. (Make it a complex sentence.)

Q. How many valence electrons does phosphorus have?

Q. Why are lithium salts commonly hydrated and those of the other alkali ions usually anhydrous?

Q. How is classical taxonomy different from modern taxonomy ?

Q. What is lake tapping? Why it takes place?