Final quiz 2nd term

All of the following elements can form covalent bonds except .................

• ₈O

• ₁₆S

• ₁₉K

• ₇N

When hydrochloric acid reacts with amonia gas .................................... evolve

• Carbon dioxide gas

• White clouds of ammonium chloride

• Nitrogen gas

• White preciptate

The chemical formula of Aluminum sulphate is ...................

• Al₂S₃

• Al (SO₄)

• Al₃ (SO₄)₂

• Al₂ (SO₄)₃

By increasing the percent of CO₂ in the atmosphere the temprature of the air .......................

• Increases

• Decreases

• Be half its value

• Doesn't change

All of the following are periodic motion except ................................ motion

• Rotary bee

• Sunflower

• Train

• Swing

........................ force is rsponsible for stoping and moving cars and buses.

• Gravitational

• Friction

• Inertia

• Weight

The right chemical equation that represents combination between tow non meta elements is ........................................

• 2Na + Cl₂ ------- 2Na Cl

• H + H ------- H₂

• NH₃ + HCl ------- NH₄Cl

• C + O₂ ----- CO₂

The odd word of the following is

(Mars - Jupitar - Earth - Venus)

• Mars

• Jupitar

• Earth

• Venus

The heavy metals (Iron & Nickel) are found in the ........................... of the earth

• Earth's crust

• Mantle

• Outer core

• Inner core

By adding Diluted hydrochloric acid to tow samples of Sandstone and Limestone

.........................................

• Water vapour gas evolves from the limestone

• Carbon dioxide gas evolves from sandstone sample

• Carbon dioxide gase evolves from limestone sample

• A marble metamorphic stone formed