the pollutant that cause headache and may cause death

• CO

• CO2

• SO2

• SO3

The main reason of the green house effect is :

• Increase in carbon monoxide conc. In atmosphere

• Increase in carbon dioxide conc. in the atmosphere

• Increase in the sulfer dioxide conc. In the atmosphere

• Increase in the acidic gaseous in the atmosphere

Acid rain has a negative effect on

• Economy

• Environment

• Health

• All choices

Acid and base react to produce salt and water which is called

• Element with element reaction

• Element with compound reaction

• Neutralization reaction

• Combustion reaction

When acid dissolves in water it release.....

• H ion

• H gas

• OH ion

• He

Bases make the red litmus paper

• Still red

• Change to orange

• Change to blue

• Change to green

.......... are a good comductors to heat and electricity

• Non metals

• Metalloides

• Metals

• Gases

Lossing the outershell electrons in metals produce

• Negative ion

• Positive ion

• Neutral ion

• None

All elements lose or gain electrons to reach....

• Octet state

• Noble gas cofiguration

• Stable state

• All choices are correct

Balanced chemical equation represent the condition of the reaction by adding integer before the reactants and products

• True

• False