Итоговая контрольная работа по химии для 8 класса

Итоговая контрольная работа по химии для 8 класса

1.       Электронное строение 2e;8e;6e, имеют атомы элемента неметалла:                                                           а) CI                                                                                                                                                                                                                           б)N                                                                                                                                                                                        в)S                                                                                                                                                                                            г)F

2.       Атом кислорода  содержит на внешнем слое                                                                                                     а) 4 электрона                                                                                                                                                    б) 6 электрона                                                                                                                                                                       в)  16 электрона                                                                                                                                                                 г) 32 электрона

3.       Как изменяется радиус атома в ряду   Li-Na-K                                                                                                       а) не изменяется                                                                                                                                                                   б)  сначала увеличивается,потом уменьшается                                                                                                          в) уменьшается                                                                                                                                                                    г) увеличивается    

4.       Вещество с полярной ковалентной связью имеет формулу                                                                       а) BaCI₂                                                                                                                                                                                     б)Cl₂                                                                                                                                                                                  в)PCl₃                                                                                                                                                                                г)Ba 

5.        Вещество, называемое оксидом фосфора (V), имеет формулу                                                                    а) P₂O₃                                                                                                                                                                                  б)P₂O₅                                                                                                                                                                           в)PO₅                                                                                                                                                                          г)P₅O₂

6.       Гидроксид кальция-это                                                                                                                                             а) оксид                                                                                                                                                                                     б)  соль                                                                                                                                                                                        в) кислота                                                                                                                                                                              г )основание

7.       Выберите среди приведённых формулу сульфата натрия                                                                                  а)  Na₂SO                                                                                                                                                                б)NaHSO₄                                                                                                                                                                              в)Na₂SO₄                                                                                                                                                                          г)Na₂S   

8.        Какая  предложенных реакций представляет реакцию   замещения                                                            а) FeO+H₂SO₄= FeSO₄+H₂O                                                                                                                                    б)Fe+H₂SO₄= FeSO₄+H₂                                                                                                                                                        в)3Fe+ 2O₂= Fe₂O₃                                                                                                                                          г)FeCO₃=FeO+CO₂ 

9.       Какой из металлов не реагирует с водным раствором  нитрата серебра?                                                         а) железа                                                                                                                                                                                      б)  медь                                                                                                                                                                                                                      в)  золото                                                                                                                                                                      г)цинк

10.   Какое из простых веществ неметаллов  при комнатной   температуре находится в твердом агрегатном состоянии                                                                                                                                                  а) йод                                                                                                                                                                                                                                  б)  магний                                                                                                                                                                                       в) кислород                                                                                                                                                                          г) бром

11.    Относительная молекулярная  масса  серной кислоты равна                                                                      а) 49      б) 98   б) 56   г) 100

12.   Раствор серной кислоты окрашивает лакмус в                                                                                                а)синий    б)  красный   в)  зеленый    г) коричневый цвет

13.   Напишите уравнения с полным ответом реакций, отвечающие следующей цепочке превращений :                                                                                                                                                     магний→хлорид магния→ гидроксид натрия   

14.   Расчитать  массу, обьем(н.у)  и количество вещества для 12,04·10²³ молекул О₂.

15.   Закончить уравнение  в молекулярном  виде, расставить коэфициенты и привести его также в полном и сокращенном ионном ввиде  : BaCl ₂+H₂SO₄