Write the structure of the principal organic product formed in the reaction of 1-propanol...

Write the structure of the principal organic product formed in the reaction of 1-propanol with each of the following reagents:

(a) Sulfuric acid (catalytic amount), heat at 140°C

---

(b) Sulfuric acid (catalytic amount), heat at 200°C

---

(c) Dimethyl sulfoxide (DMSO), oxalyl chloride [(COCl)₂], triethylamine [N(CH₂CH₃)₃]

---

(d) Pyridinium chlorochromate (PCC) in dichloromethane

---

(e) Potassium dichromate (K₂Cr₂O₇) in aqueous sulfuric acid, heat

---

(f) Sodium amide (NaNH₂)

---

(g)

---

(h)

---

(i)

---

(j)

---

(k)