Which of the following is not correctly matched?

Which of the following statement$(s)$ is(are) correct with reference to the ferrous and ferric ions?

Which one of the following statements is correct?

Choose an incorrect match of the colour of compounds.

Which reagents are used for the identification of Group $IV$ cations?

$A$ salt with a few drops of conc. $HCl$ gives an apple green colour in a flame test. The group precipitate of the salt is dissolved in acetic acid and treated with $K_{2}CrO_{4}$ to give a yellow precipitate. When the sodium carbonate extract of the salt solution is heated with conc. $HNO_{3}$ and ammonium molybdate, it results in a canary yellow precipitate. The cation and anion present in the salt are respectively,