Which of the following molecules have the following: ionic bond, covalent $σ$ -bond, covalent $π$ -bond?

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${NH}_{4} Cl$

${CH}_{3} CN$

${NH}_{4} {NO}_{3}$

${CaC}_{2}$

answer is A, C.

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Detailed Solution

${CaC}_{2}$ :- We know that the bond which is formed by exchanging electrons between a metal and non-metal atom is called an ionic bond. Calcium is an alkali earth metal and carbon is a non-metal. So, calcium carbide ( ${CaC}_{2}$ ) should be an ionic bond.

${CaC}_{2}$ has a combination of bonds. It is an ionic lattice that has Ca(2+) cations and acetylide C2(2-) anions. Within each C2(2-), there is a triple bond between the 2 C atoms, consisting of 1 sigma and 2 pi bonds.

${NH}_{4} {NO}_{3}$ is a nitrate salt of the ammonium cation. Since ammonium is a cation and bonds with the anion nitrate, hence the compound is bonded by an ionic bond.

It has an ionic bond as it exists NH₄⁺ion and NO₃⁻ion. there is a covalent bond between nitrogen and oxygen exists. It has both sigma and pi bonds.

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