Science Test Unit 9

Please use small letter to answer the question (except unit).
Soft drinks contain _______ (acid / alkalis)
    ____________
Tim put lemon juice, tap water and bleach in three test 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 the liquid 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 isthe colour intest tube C?    ____________
Tom put a blue litmus paper in dilute ammonia solution. What colour will the litmus paper become?
    ____________
Name one electronic instrument to measure the pH of solutions.
    ____________
Peter want measure the pH of a dark-coloured solutions. He should use ___________.
a pH meter
universal indicator
Fill in the blank.
填空1    ____________
Fill in the blank
填空1    ____________
填空2    ____________
填空3    ____________
Which material can not corroded by the acid.
Zinc
Iron
Copper
Sandstone
请选择一个选项
A.选项1
B.选项2
C.选项3
D.选项4
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. Whensulphuric acidand nitrogen oxides react with oxygen andwater in the air, I am formed.    ____________

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