CHEMISTRY CH12 Periodic Classification of Elements — Science STD 9 — Question

Electroplating is an example for ______.

………………..is used to connect the speaker to the computer.

A body is projected up with an initial velocity u m/s. It goes up to a height, ‘h’ metres in seconds time. Then it comes back at the point of projection. Considering negligible air resistance, which of the following statement is true?

A car is being driven at a speed of 20ms-1 when brakes are applied to bring it to rest in 5 s. The deceleration produced in this case will be

The root of the plant is ______.

1. positively phototropic but negatively geotropic 
2. positively geotropic but negatively phototropic
3. negatively phototropic but positively hydrotropic 
4. negatively hydrotropic but positively phototropic

The following is not a safety device.

Fever, sore throat, and choking of air passage are symptoms of ……………

The process of water cycle that related with the plants is called …………………

Noble gases are placed in the _______ group in the modern periodic table.

…………………. supports and controls movements during flight of a bat.