Предмет: Химия, автор: Anthurium5Lamun

Напишите пожалуйста:

1. Какой металл встречается в земной коре в чистом виде:
а) свинец, б) медь, в) натрий, г) железо
2. Какой процесс называют пирометаллургией:
а) получение металлов из растворов солей,
б) получение металлов при обжиге минералов,
в) получение металлов с помощью электрического тока,
г) получение металлов с помощью бактерий
3. Какие восстановители используют для восстановления металлов из их оксидов:
а). C , CO2, H2 ;                      б). Fe , Zn , Sn ;

        в). Mg, CO2 , H2 ;                   г).CO , H2 , Al ?
4.Какие металлы относятся к щелочным: а) Na, Mg, Al;  б) K, Li, Na;  в) Ca, Sr, Ba;  г) Be, Mg, Ca
5.
Какие восстановители используют для восстановления меди из водного раствора CuSO4 :          а). C , CO2 , H2;                  б). CO , H2, Al ;

          в). Mg , CO2, H2 ;               г). Fe , Zn , Sn ?

Ответы

Автор ответа: lyubavasil
0
1.б, 
2.б,
3.г
4.б
5.г
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