6.Identify this disease that had no cure until 50 years ago.
bacteria.
(A) Typhoid (B) Common cold (C) Cholera (D) Tuberculosis)
7. A piece of zinc (zn) - a reactive metal was dropped into a test tube containing hydrochloric acid (HC1). The bubbling in the tube indicated that a gas was released. The gas could be which of these?
(A) Hydrogen (H2) (B) Oxygen (O2)
(C) Methane (CH4) (D) Carbon dioxide (CO2)
Answers
Answered by
1
Answer:
6. answer is d option
7. answer is option a) Hydrogen
Answered by
0
Answer:
Answer d is the correct answer.
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