? asked in 科學及數學化學 · 1 decade ago

中2科學(英文)

1.helium and neon which belong to a group of very unreactive gases,

are examples of??

2.oxygen??a glowing splint.

3.carbon dioxide turns hydrogencarbonate indicator from red to??

4.water turns dry??paper from blue to??

5.breathed air contains more??and water vapour than unbreathed air

.its temperature is??than that of unbreathed air.

2 Answers

Rating
  • 1 decade ago
    Best Answer

    1. Helium and neon which belong to a group of very unreactive gases, are examples of noble gases.

    2. Oxygen relights a glowing splint.

    3. Carbon dioxide turns hydrogencarbonate indicator from red to yellow.

    4. Water turns dry cobalt(II) chloride paper from blue to pink.

    5. Breathed air contains more carbon dioxide and water vapour than unbreathed air. Its temperature is higher than that of unbreathed air.

  • nick
    Lv 5
    1 decade ago

    1. noble gases

    2. relights

    3. orange

    4. cobalt ; pink

    5. carbon dioxide ; higher

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