Statement 1: $\sim (p \leftrightarrow\sim q)$ is equivalent to $p \leftrightarrow q$
Statement 2: $\sim (p \leftrightarrow\sim q)$ is tautology.
Then which of the following statements is correct

Q. Statement - 1: 'La' should be the f - block element according to Aufbau principle.
Statement - 2: 57th electron exceptionally enters into the 5d - orbital.

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Assertion :Statement − 1 : The melting point of LiCl is lower than that of NaCl. Reason: Statement − 2 : LiCl has predominantly covalent nature, whereas NaCl is ionic.

The correct option is A Statement − 1 is true, Statement − 2 is true and Statement − 2 is correct explanation for Statement − 1.Due to lower size of Li ion, it has more polarization and LiCl has predominantly covalent nature so it has lower melting point than NaCl.

Assertion :Statement $-$ 1 : The melting point of $L i C l$ is lower than that of $N a C l$ . Reason: Statement $-$ 2 : $L i C l$ has predominantly covalent nature, whereas $N a C l$ is ionic.

The correct option is A Statement $-$ 1 is true, Statement $-$ 2 is true and Statement $-$ 2 is correct explanation for Statement $-$ 1.
Due to lower size of $L i$ ion, it has more polarization and $L i C l$ has predominantly covalent nature so it has lower melting point than $N a C l$ .