1st midterm 9th grade 2014

1. Substance which gives H + ion into water is called... a. acid b. base c.salt d. oxide 2. Which one of the following is a weak acid? a. CH 3 COOH b. HI c. H 2 SO 4 d. HNO 3 3. Which one of the following is wrong for acids? a. They conduct electricity b. They have sour taste c. They give OH - ion in water d. They change the color of litmus paper to red 4. properties of acids: Sour, generally reactive with metals, ability to change colors in indicators. which ones of these compounds belongs to acid compound? a. lemon juice, vinegar, hand soap b. apple juice, toothpaste, baking soda c. vinegar, HCl, orange juice d. caustic soda , baking soda, shower gel 5. Which of the following is wrong? a. Li(OH) 2 : Lithium hydroxide b. H 3 PO 3 :Phosphorous acid c. Mg(OH) 2 :Magnesium hydroxide d. HF :Hydrofluoric acid 6. Below is a listing of some common items and their approximate pH values. Which of the following items would turn red litmus paper blue? SMP 9 1 st SEMESTER OF ACADEMIC YEAR 2014-2015 CHEMISTRY 1 st MID TERM EXAM

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1. Substance which gives H+ ion into water is called...a. acid b. base c.salt d. oxide

2. Which one of the following is a weak acid?a. CH3COOHb. HIc. H2SO4

d. HNO3

3. Which one of the following is wrong for acids?a. They conduct electricityb. They have sour tastec. They give OH- ion in water d. They change the color of litmus paper to red

4. properties of acids: Sour, generally reactive with metals, ability to change colors in indicators.which ones of these compounds belongs to acid compound?a. lemon juice, vinegar, hand soapb. apple juice, toothpaste, baking sodac. vinegar, HCl, orange juiced. caustic soda , baking soda, shower gel

5. Which of the following is wrong?a. Li(OH)2 : Lithium hydroxideb. H3 PO3 :Phosphorous acid c. Mg(OH)2:Magnesium hydroxided. HF :Hydrofluoric acid

6. Below is a listing of some common items and their approximate pH values.

Which of the following items would turn red litmus paper blue?a. pure water b. grapes c. milk d. ammonia

7. Which one the following products is not a cleanser?a. Detergentb. Soapc. Kerosened. Toothpaste

8. These are components in detergent, except…a. surfactant

SMP

1st SEMESTER OF ACADEMIC YEAR 2014-2015

CHEMISTRY 1st MID TERM EXAM

b. oxidantc. perfumed. fluoride

9. We can reduce the negative effect of excessive use of chemical by doing one of these ways, except,,,,

a. Use chemicals in appropriate amount according to our need.b. Use chemicals that is degradable so it will not pollute the environmentc. Do not pay attention to safety standards while using chemicalsd. Recycling the products that contain chemicals

10.DDT is a/an…..a. bleacherb. cleanerc. insecticided. detergent

Note : Questions Distribution :

Acid and Bases:- Acids and bases : Introduction of Acids and Bases : 8 - Acids and Bases in our daily life : 5- Naming Acids and Bases : 2- Strong and Weak Acids: Neutralization reaction : 4- Artificial Indicators : 4

Chemical Around us- A classifying household, chemicals, and cleaners : 3- Bleches and Insectic : 1- The effect of Chemical and its prevention : 3

Total Question : 20

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