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- 1. Multiple Choice
metal oxides are generally
acidic in nature
basic in nature
neutral
some may be acidic some may be basic
- 2. Multiple Choice
HCl is aciidic in
in gaseous state
in benzene solution
in aqueous solution
in any of these
- 3. Multiple Choice
in aqueous solution, H+ ions exist as
H30+
H9O4+
Neither of these
either H30+ or H9O4+
- 4. Multiple Choice
which of the acids are called king of chemicals
H Cl
H2so4
HNo3
vinegar(acetic acid)
- 5. Fill in the Blank
Litmus solution is purple colured dye extracted from__________ plant
- 6. Multiple Choice
phenophthalein has __________ colur in basic solution.
red
pink
yellow
green
- 7. Multiple Choice
What property do all three of these common household substances have in common?they are all basicthey taste sourthey have a pH below 7they all turn litmus paper red - 8. Multiple ChoiceIf you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH?add more acidadd more waterincrease the temperatureadd a base
- 9. Multiple ChoiceWhich of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.Acids; pH less than 7Acids; pH greater than 7Bases; pH greater than 7Bases; pH less than 7 - 10. Multiple ChoiceIf an acid is combined with a base of equal strength, the result will most likely bea neutral solution.a stronger acid.impossible to tell without testing the pH.a stronger base
- 11. Multiple ChoiceWhich type of ion does a base produce when it is dissolved in water?oxideoxygenhydrogenhydroxide
- 12. Multiple ChoiceWhich of the following is true about acids and bases?The lower the pH, the stronger the acidthe higher the pH, the stronger the acidThe lower the pH, the more neutral the acidThe higher the pH, the weaker the base
- 13. Multiple ChoiceOn the pH scale what numbers are bases?8-140-771
- 14. Multiple Choice
Which type of ion does an acid produce when it is dissolved in water?
oxide
oxygen
hydronium
hydroxide
- 15. Multiple Choice
What is the pH of a solution that results from the complete neutralization of an HCl solution with a KOH solution?
1
7
10
4
- 16. Multiple ChoiceSaltsformed from joining positive and negative ionsincrease OH ionsforms a salt and waterincreases H2O ions
- 17. Multiple ChoiceWhich of the following is a salt: ammonia or sodium chloride?ammoniasodium chloride
- 18. Multiple ChoiceThe difference between a strong and weak acid is:Strong acids stay intact in water weak acids don'tStrong acids are slippery weak acids aren'tStrong acids break apart in water. Weak acids stay intactWeak acids break apart in water most of the time, strong acids do all of the time.
- 19. Multiple ChoicePickles form by soaking in an acid. What are some properties of picklesConducts electricity, bitter, turns litmus blueSlippery, sour, turns litmus blueSlippery, bitter, turns litmus blueSour, turns litmus red, can conduct electricity
- 20. Multiple ChoiceRanging from 0 to 14, a pH value indicates how acidic or basic a solution is. Which of these pH values would be a strong acid?26913
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