Science Test Unit 9 - 在线考试测评模板

Science Test Unit 9

Please use small letter to answer the question (except unit).

Q1:Soft drinks contain _______ (acid / alkalis)

填空1

Q2:Tim putlemon juice, tap water and bleach in threetest tube respectively. Then he put some universal indicator into three test tube and label them with A, B, C. After some times, the colour of theliquid in test tube change.

The colour in test tube A is red. What is the liquid in it?

The colour in test tube B is bule. What is the liquid in it?

What is the colour in test tube C?

Q3:Tom put a blue litmus paper in dilute ammonia solution. What colour will the litmus paper become?

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Q4:Name one electronic instrument to measure the pH of solutions.

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Q5:Peter want measure the pH ofa dark-coloured solutions. He should use ___________.

a pH meter

universal indicator

Q6:Fill in the blank.

填空1

Q7:Fill in the blank

填空1

填空2

填空3

Q8:Which material can not corroded by the acid.

Zinc

Iron

Copper

Sandstone

Q9:请选择一个选项

A.选项1

B.选项2

C.选项3

D.选项4

Q10:Guess who I am.

a. I am produced when dilute acids react with some metals.

b. I am contained in limestone so that the limestone will corroded by acid.

c. I reacts with rainwater to form carbonic acid.

d. When sulphuric acid and nitrogen oxides react with oxygen andwater in the air, I am formed.