Comprehensive exam in science. Prep 2

Clorine can replace...... In their salts solutions

• F

• Br

• At

Water is good polar solvent for most...... Compound

• Polar

• Non_polar

• Ionic

The region between the first and the second layers of atmospheric envelop is called.......

• Tropopause

• Stratopause

• Mesopause

All the following elements react with dilute hydrochloric acid except.........

• Cu

• C

• S

Ozone layer allows 100% of the....... UV- rays to penetrate the Earth's atmosphere

• Far

• Medium

• Near

Each period starts with strong.......

• Non-metal

• Metal

• Semi-metal

Hofmann's voltameter is used for water

• Electrolyzing

• Ionization

• vaporization

Worms' tunnels are examples of....... Fossils

• Cast

• Mold

• Trace

......... Radiation has chemical effect.

• Infrared

• Ultraviolet

• No correct answer

All the following are examples of microfossils except.........

• Radiolaria

• Elodea

• Foraminifera