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Answer:
Single displacement and reduction
Explanation:
In a single-displacement reaction, one element exchanges partners with another.
This is a single-displacement reaction, because the element Ca exchanges partners with H.
This is also a reduction/oxidation (redox) reaction, because the optically active of Ca increases from 0 to +2 (oxidation), while the oxidation number of H decreases from +1 to 0 (reduction),
The most common types of reactions are:
- Combination
- Decomposition
- Single displacement
- Double displacement
- Reduction/oxidation
Answer : The equation for the reaction of hydrocyanic acid with sodium hydroxide is as follows:
H−C≡N<span>(aq.)</span>+NaOH<span>(aq.)</span>→ Na−C≡N<span>(aq) </span>+
(aq)
This is similar to double displacement reaction and the net ionic form of the equation can be given by :
H−C≡N <span>(aq) </span>+
<span>(aq)</span>→ 
≡N<span>(aq)</span>+<span>(aq<span>)</span></span>
H−C≡N<span>(aq.)</span>+NaOH<span>(aq.)</span>→ Na−C≡N<span>(aq) </span>+
This is similar to double displacement reaction and the net ionic form of the equation can be given by :
H−C≡N <span>(aq) </span>+