Which of the following will not give the chemical tast for iron in aqueous solution ?

Which of the following compound will give yellow ppt. on shaking aqueous solution of NaOH follwed by acidification and addition of AgNO_(3) solution ?

Which of the following oxides will not give OH^(-) in aqueous solution ?

Which of the following oxide does not give any oxyacid in aqueous solution ?

Which of the following salt give coloured aqueous solution ?