PRACTICAL CHEMISTRY
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PRACTICAL CHEMISTRY

37516 The primary standard solution for estimation of \(N{a_2}{S_2}{O_3}\) is

1 \({I_2}\) solution
2 \(KMn{O_4}\)
3 \({K_2}C{r_2}{O_7}\)
4 Oxalic acid
PRACTICAL CHEMISTRY

37517 Acidic solution of \({S_2}O_3^{2 - }\) is converted to ....... in presence of \({I_2}\)

1 \({S_4}O_6^{2 - } + {I^ - }\)
2 \(SO_4^{2 - } + {I^ - }\)
3 \(S{O_3} + {I^ - }\)
4 \({S_4}O_6^{2 - } + I_3^ - \)
PRACTICAL CHEMISTRY

37518 A white solid ‘\(A\)’ on heating gives off a gas which turns lime water milky. The residue is yellow when hot but turns white on cooling. This solid ‘\(A\)’ is

1 Zinc sulphate
2 Zinc carbonate
3 Lead sulphate
4 Lead carbonate
PRACTICAL CHEMISTRY

37519 A salt on treatment with dil. \(HCl\) gives a pungent smelling gas and a yellow precipitate. The salt gives green flame when tested. The salt solution gives a yellow precipitate with potassium chromate. The salt is

1 \(NiS{O_4}\)
2 \(Ba{S_2}{O_3}\)
3 \(Pb{S_2}{O_3}\)
4 \(CuS{O_4}\)
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PRACTICAL CHEMISTRY

37516 The primary standard solution for estimation of \(N{a_2}{S_2}{O_3}\) is

1 \({I_2}\) solution
2 \(KMn{O_4}\)
3 \({K_2}C{r_2}{O_7}\)
4 Oxalic acid
PRACTICAL CHEMISTRY

37517 Acidic solution of \({S_2}O_3^{2 - }\) is converted to ....... in presence of \({I_2}\)

1 \({S_4}O_6^{2 - } + {I^ - }\)
2 \(SO_4^{2 - } + {I^ - }\)
3 \(S{O_3} + {I^ - }\)
4 \({S_4}O_6^{2 - } + I_3^ - \)
PRACTICAL CHEMISTRY

37518 A white solid ‘\(A\)’ on heating gives off a gas which turns lime water milky. The residue is yellow when hot but turns white on cooling. This solid ‘\(A\)’ is

1 Zinc sulphate
2 Zinc carbonate
3 Lead sulphate
4 Lead carbonate
PRACTICAL CHEMISTRY

37519 A salt on treatment with dil. \(HCl\) gives a pungent smelling gas and a yellow precipitate. The salt gives green flame when tested. The salt solution gives a yellow precipitate with potassium chromate. The salt is

1 \(NiS{O_4}\)
2 \(Ba{S_2}{O_3}\)
3 \(Pb{S_2}{O_3}\)
4 \(CuS{O_4}\)
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PRACTICAL CHEMISTRY

37516 The primary standard solution for estimation of \(N{a_2}{S_2}{O_3}\) is

1 \({I_2}\) solution
2 \(KMn{O_4}\)
3 \({K_2}C{r_2}{O_7}\)
4 Oxalic acid
PRACTICAL CHEMISTRY

37517 Acidic solution of \({S_2}O_3^{2 - }\) is converted to ....... in presence of \({I_2}\)

1 \({S_4}O_6^{2 - } + {I^ - }\)
2 \(SO_4^{2 - } + {I^ - }\)
3 \(S{O_3} + {I^ - }\)
4 \({S_4}O_6^{2 - } + I_3^ - \)
PRACTICAL CHEMISTRY

37518 A white solid ‘\(A\)’ on heating gives off a gas which turns lime water milky. The residue is yellow when hot but turns white on cooling. This solid ‘\(A\)’ is

1 Zinc sulphate
2 Zinc carbonate
3 Lead sulphate
4 Lead carbonate
PRACTICAL CHEMISTRY

37519 A salt on treatment with dil. \(HCl\) gives a pungent smelling gas and a yellow precipitate. The salt gives green flame when tested. The salt solution gives a yellow precipitate with potassium chromate. The salt is

1 \(NiS{O_4}\)
2 \(Ba{S_2}{O_3}\)
3 \(Pb{S_2}{O_3}\)
4 \(CuS{O_4}\)
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PRACTICAL CHEMISTRY

37516 The primary standard solution for estimation of \(N{a_2}{S_2}{O_3}\) is

1 \({I_2}\) solution
2 \(KMn{O_4}\)
3 \({K_2}C{r_2}{O_7}\)
4 Oxalic acid
PRACTICAL CHEMISTRY

37517 Acidic solution of \({S_2}O_3^{2 - }\) is converted to ....... in presence of \({I_2}\)

1 \({S_4}O_6^{2 - } + {I^ - }\)
2 \(SO_4^{2 - } + {I^ - }\)
3 \(S{O_3} + {I^ - }\)
4 \({S_4}O_6^{2 - } + I_3^ - \)
PRACTICAL CHEMISTRY

37518 A white solid ‘\(A\)’ on heating gives off a gas which turns lime water milky. The residue is yellow when hot but turns white on cooling. This solid ‘\(A\)’ is

1 Zinc sulphate
2 Zinc carbonate
3 Lead sulphate
4 Lead carbonate
PRACTICAL CHEMISTRY

37519 A salt on treatment with dil. \(HCl\) gives a pungent smelling gas and a yellow precipitate. The salt gives green flame when tested. The salt solution gives a yellow precipitate with potassium chromate. The salt is

1 \(NiS{O_4}\)
2 \(Ba{S_2}{O_3}\)
3 \(Pb{S_2}{O_3}\)
4 \(CuS{O_4}\)