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See all →- Match List I with List IIList I (Ion): A. Co^2+ B. Mg^2+ C. Pb^2+ D. Al^3+List II (Group Number in Cation Analysis): I. Group-I II. Group-III III. Group-IV IV. Group-VIChoose the correct answer from the options given below : Answer: 2. A-III, B-IV, C-I, D-II Key idea: recall the group of each cation in qualitative analysis. mathrmPb²⁺ : Group I (precipitated as c... 1
- During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of Fe^2+ ion? Answer: 1. dilute sulphuric acid Key idea: mathrmFe²⁺ salts hydrolyse in water, so a little acid is added, and it must not oxidise mathrmFe²... 1
- Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.A. Al^3+ B. Cu^2+ C. Ba^2+ D. Co^2+ E. Mg^2+Choose the correct answer from the options given below: Answer: 2. B, A, D, C, E Key idea: group numbers in qualitative analysis. mathrmCu²⁺ : Group II ( H₂S in acid). mathrmAl³⁺ : Group III ( NH₄... 1
- Pumice stone is an example of - Answer: 4. solid sol Key idea: Name a colloid by its dispersed phase and dispersion medium. Pumice stone is a solid that traps gas, so gas i... 1
- Given below are two statements :Statement I :In the coagulation of a negative sol, the flocculating power of the three given ions is in the order -Al^3+ > Ba^2+ > Na^+Statement II :In the coagulation of a positive sol, the flocculating power of the t… Answer: 4. Statement I is correct but Statement II is incorrect. Key idea: by the Hardy-Schulze rule, the coagulating ion is the one with ch... 1
- Measuring Zeta potential is useful in determining which property of colloidal solution ? Answer: 3. Stability of the colloidal particles Zeta potential is the potential difference between the fixed layer of charge on a colloidal... 1