🧪 test po ximii (7–8 klass)

🧪 test po ximii (7–8 klass) 50 voprosov i otveti vopros 1. osnovnoy komponent vozduxa? a) kislorod b) azot c) uglekisliy gaz d) vodorod vopros 2. formula vodi? a) co₂ b) h₂o c) o₂ d) h₂ vopros 3. kakaya chastitsa imeet polojitelniy zaryad? a) proton b) neytron c) elektron d) molekula vopros 4. ximicheskiy simvol kaltsiya? a) c b) ca c) k d) cl vopros 5. formula sernoy kisloti? a) h₂so₄ b) hno₃ c) hcl d) h₂co₃ vopros 6. kak nazivaetsya protsess videleniya gaza pri nagrevanii? a) kondensatsiya b) dissotsiatsiya c) razlojenie d) gorenie vopros 7. massovoe chislo atoma — eto? a) kolichestvo protonov b) kolichestvo neytronov c) summa protonov i neytronov d) chislo elektronov vopros 8. povarennaya sol? a) …

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