Acids, Bases and Salts — Science STD 9 — Question

Why did the characteristic of the Rounded- Yellow seeds alone appear in the Fj generation but not the characteristic of the wrinkled- green seeds?

Calcium Carbonate

Establish your own plant nursery near your school or home. Prepare the seedlings of flowering plants, fruit plants, and ornamental plants being grown in your area. Can you start a business in the future with the help of this activity? Think it over.

You may have seen a lush green soft carpet on old walls, bricks and rocks in the rainy season. Scrape it gently with a small ruler, observe it under a magnifying lens and discuss.

The following table shows current in Amperes and potential difference in Volts.

Find the average resistance.

Calculate distance travelled by a sound wave having frequency 1000 Hz and wavelength 0.25 m, if it travels for 5 seconds in a certain medium.

When sodium bicarbonate reacts with hydrochloric acid. OR Dilute HC1 was poured on baking soda

Sometimes, we choke while eating in a hurry.

Which types of cottage industries and factories can be started in areas with abundant milk production?

At least a small quantity of garbage or waste is produced every day in each house. What will happen if you keep this garbage for many days in your house?