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(D) The flame test is used to identify the presence of certain metal ions in a sample based on the characteristic color they impart to a flame.Among t

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$4$

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(D) The flame test is used to identify the presence of certain metal ions in a sample based on the characteristic color they impart to a flame.Among the given ions,$Sr^{2+}$ (crimson red),$Ba^{2+}$ (apple green),$Ca^{2+}$ (brick red),and $Cu^{2+}$ (blue-green) show a positive flame test.$Zn^{2+}$,$Co^{2+}$,and $Fe^{2+}$ do not give a characteristic flame test.Therefore,the total number of metal ions that respond to the flame test is $4$.

Column $-I$	Column $-II$
$(a)$ Borax	$(p)$ $NaCl$
$(b)$ Carnallite	$(q)$ $KCl$
$(c)$ Rock salt	$(r)$ $KCl.MgCl_2.6H_2O$
$(d)$ Silvine	$(s)$ $Na_2B_4O_7.10H_2O$

Number of metal ions characterized by flame test among the following is $....$.
$Sr^{2+}, Ba^{2+}, Ca^{2+}, Cu^{2+}, Zn^{2+}, Co^{2+}, Fe^{2+}$

Similar Questions

Match column $-I$ with column $-II$ :

Column $-I$ Column $-II$

$(a)$ Borax $(p)$ $NaCl$

$(b)$ Carnallite $(q)$ $KCl$

$(c)$ Rock salt $(r)$ $KCl.MgCl_2.6H_2O$

$(d)$ Silvine $(s)$ $Na_2B_4O_7.10H_2O$

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Number of metal ions characterized by flame test among the following is $....$.$Sr^{2+}, Ba^{2+}, Ca^{2+}, Cu^{2+}, Zn^{2+}, Co^{2+}, Fe^{2+}$