Acids and alkalis

1. Water would be best described as
pH8
Weak alkali
pH6
A weak acid
pH1
Strong acid
pH7
Neutral
2. If Magnesium hydroxide (indigestion powder) were added to vinegar which of the answers would best describe what would happen?
3. If weak lemon juice was added to Universal Indicator what colour would it turn?
Blue
Weak alkali (pH8, 9 or 10)
Purple
Strong alkali (pH 13,14)
Red
Strong acid (pH 1or 2)
Yellow
Weak acid (pH5 -6)
Green
Neutral (pH7)