Precise Chemistry

Water v***r present in air at sea level is a practical application of which law?
A. Boyle’s law
B. Charles’ law
C. Dalton’s law of partial pressures
D. Graham’s law

Base and Alkali, Real difference

4. Calcium hydroxide is called an alkali because:
A. It is a metal
B. It reacts with acids
C. It is soluble in water
D. It has high pH

3. Which substance produces OH⁻ ions only when dissolved in water?
A. Acid
B. Base
C. Alkali
D. Salt

2. All alkalis are:
A. Acids
B. Salts
C. Bases
D. Neutral substances

1. Which of the following is a base but NOT an alkali?
A. NaOH
B. KOH
C. NH₄OH
D. CuO