Which of the following cations is detected by the flame test?

Which of the following is detected by the flame test:

Which of the following cation gives red colour in flame test? (A) Cs^(+) (B) Ba^(2+) (C) Sr^(2+) (D) K^(+)

Which of the following can be detected by silver mirror test

Which of the following ions cannot be detected by the borax bead or microcosmic bead test?

Which of the following ions cannot be detected by the borax bead or microcosmic bead test?