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How many millilitres are in 1 litre?

1. A10,000
2. B100
3. C10
4. D1000

Apart from mercury, which element is a liquid at room temperature?

1. AChlorine
2. BIodine
3. CSodium
4. DBromine

Gas apa yang menyusun sebagian besar udara Bumi?

1. AKarbon dioksida
2. BOksigen
3. CNitrogen
4. DHidrogen

Berapa muatan ion klorida?

1. A+1
2. B−2
3. C−1
4. D+7

Mengapa molekul air bersifat polar?

1. AOksigen menarik elektron bersama lebih kuat, dan molekulnya bengkok
2. BAir memiliki ikatan ion antara hidrogen dan oksigen
3. CHidrogen lebih elektronegatif daripada oksigen
4. DMolekul air lurus, dengan kedua hidrogen pada satu garis

Which halogen is the most reactive?

1. AChlorine
2. BFluorine
3. CIodine
4. DBromine

A strip of magnesium is burned in air and the white ash weighs more than the original strip. Why?

1. AMass was created during the reaction
2. BThe ash absorbed water from the flame
3. COxygen from the air has combined with the magnesium
4. DMagnesium atoms became heavier when heated

At the top of a high mountain, air still contains about 21% oxygen. Why do climbers still get less oxygen with each breath?

1. ACold air contains no oxygen
2. BThe percentage of oxygen in the air falls sharply as you climb higher
3. COxygen is heavier, so it all sinks to sea level
4. DThe total air pressure is lower, so the partial pressure of oxygen is lower