P-1 Effects of electric current — Science STD 10 — Question

Which metal becomes black in the presence of hydrogen sulphide gas in air?

Write any one example of natural disasters.

Name a sodium compound which is used for making borax and glass.

How much energy do we get from carbohydrates, lipids and protein?

Define non-metals. Give five examples of non-metals.

Write the name and formula of an organic compound containing a ketone functional group.

State the number of groups and periods in the modern periodic table.

The minimum distance of distinct vision for a normal human eye is………..

In the earlier class, you had prepared the solution of dry yeast for observation of yeast. Which substance is prepared by its use on commercial basis?

What do you think will be the pH of an antacid solution: less than 7 or more than 7?