Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from I to VI.
A. Al³⁺
B. Cu²⁺
C. Ba²⁺
D. Co²⁺
E. Mg²⁺
Choose the correct answer from the options given below
1. B, C, A, D, E
2. E, C, D, B, A
3. E, A, B, C, D
4. B, A, D, C, E

Subtopic: Detection of Cations |

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Q2:

During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of Fe²⁺ion?
1. Concentrated sulphuric acid
2. Dilute nitric acid
3. Dilute sulphuric acid
4. Dilute hydrochloric acid

Subtopic: Preparation of the Organic and Inorganic compounds |

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Q3:

In salt analysis, group V radicals

$\mathrm{(Ba^{2+}, Ca^{2+} ~and ~Sr^{2+} )}$ are precipitated as their carbonates by adding solid

$\mathrm{NH_4Cl}$ and excess of

$\mathrm{NH_4OH}$ solution followed by solid

$\mathrm{(NH_4)_2CO_3}$
Choose the correct reagent used for the confirmation of

$\mathrm{Ca^{2+}}$ ion from the following:

1.	Ammonium sulphate	2.	Potassium chromate
3.	Ammonium oxalate	4.	Ammonium nitrate

Subtopic: Detection of Cations |

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Q4:

In salt analyses,

$\mathrm{Cl^-,Br^-}$ and

$\mathrm{I^-}$ are identified by adding dilute

$\mathrm{HNO_3}$ followed by

$\mathrm{AgNO_3}$ solution to the salt solution.
Which of the following statements are correct?

A.	$\mathrm{Cl^-}$ gives pale yellow precipitate.
B.	$\mathrm{Br^-}$ gives pale yellow precipitate which is partially soluble in $\mathrm{NH_4OH.}$
C.	$\mathrm{I^-}$ gives yellow precipitate which is insoluble in $\mathrm{NH_4OH.}$
D.	$\mathrm{Cl^-}$ gives white precipitate which is insoluble in $\mathrm{NH_4OH.}$
E.	$\mathrm{I^-}$ gives purple violet gas.

Choose the correct answer from the options given below:

1.	B and C only	2.	A and B only
3.	A and E only	4.	D and E only

Subtopic: Detection of Anions |

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Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from I to VI. A. Al3+ B. Cu2+ C. Ba2+ D. Co2+ E. Mg2+ Choose the correct answer from the options given below 1. B, C, A, D, E 2. E, C, D, B, A 3. E, A, B, C, D 4. B, A, D, C, E

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