PPPC
2 Which of the following metals reacts with cold water to produce hydrogen gas?
a. Zinc
b. Iron
d. Calcium
c. Aluminium
3. Which of the following is used in industrial preparation of hydrogen?
a. Water gas
c. Hydrochloric acid
d. Sulphuric acid
b. Ammonia
Answers
Answered by
1
Answer:
zinc
hydrochloric acid
deepa2344:
mm
hi
main class 8 ka huns aur chemistry aur maths mere aukat se bahar hai
hii
ok
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