Question

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)

Answer 1

Answer:

6. answer is d option

7. answer is option a) Hydrogen

Answer 2

Answer:

Answer d is the correct answer.

Please mark me as the brainliest and please follow me