In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.
In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively. Q. In period […]
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Statement I: Griss-Ilosvay test is used for the detection of nitrite ion, which involves the use of sulphanilic acid and α-naphthylamine reagent. Statement II: In the above test, sulphanilic acid is diazotized by the acidified nitrite ion, which on further coupling with α-naphthylamine forms an azo-dye.
Given below are two statements: Griss-Ilosvay test is used for the detection of nitrite ion, which involves the use of
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Statement I: The number of species among BF₄⁻, SiF₄, XeF₄ and SF₄, that have unequal E − F bond lengths is two. Here, E is the central atom. Statement II: Among O₂, O₂²⁻, F₂ and O₂⁺, O₂ has the highest bond order.
Given below are two statements: The number of species among BF₄⁻, SiF₄, XeF₄ and SF₄, that have unequal E −
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Correct order of stability for the following is CH₂ = CH⁻ , CH₃ − CH₂⁻ , CH ≡ C⁻
Correct order of stability of carbanions CH2=CH−, CH3−CH2−, CH≡C− Q. Correct order of stability for the following is: CH2 =
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20.0 dm³ of an ideal gas ‘X’ at 600 K and 0.5 MPa undergoes isothermal reversible expansion until pressure of the gas is 0.2 MPa. Which of the following option is correct? (Given: log 2 = 0.3010 and log 5 = 0.6989)
20.0 dm3 of an ideal gas at 600 K and 0.5 MPa undergoes isothermal reversible expansion until pressure becomes 0.2
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Regarding the hydrides of group 15 elements EH₃ (E = N, P, As, Sb), select the correct statement from the following: A. The stability of hydrides decreases down the group. B. The basicity of hydrides decreases down the group. C. The reducing character increases down the group. D. The boiling point increases down the group.
Regarding the hydrides of group 15 elements EH3 (E = N, P, As, Sb), select the correct statement from the
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The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to Balmer series. (R = Rydberg constant)
The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to
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Consider a weak base ‘B’ of pK_b = 5.699. ‘x’ mL of 0.02 M HCl and ‘y’ mL of 0.02 M weak base ‘B’ are mixed to make 100 mL of a buffer of pH 9 at 25°C. The values of ‘x’ and ‘y’ respectively are : [Given : log 2 = 0.3010, log 3 = 0.4771, log 5 = 0.6990]
Consider a weak base B of pKb = 5.699. x mL of 0.02 M HCl and y mL of 0.02
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An organic compound undergoes first order decomposition. The time taken for decomposition to (1/8)ᵗʰ and (1/10)ᵗʰ of its initial concentration are t₁⁄₈ and t₁⁄₁₀ respectively. What is the value of (t₁⁄₈ / t₁⁄₁₀) × 10 ? (log 2 = 0.3)
An organic compound undergoes first order decomposition. The time taken for decomposition to (1/8)th and (1/10)th of its initial concentration
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Statement I: The number of pairs, from the following, in which both the ions are coloured in aqueous solution is 3. [Sc³⁺, Ti³⁺], [Mn²⁺, Cr²⁺], [Cu²⁺, Zn²⁺] Statement II: Th⁴⁺ is the strongest reducing agent among Th⁴⁺, Ce⁴⁺, Gd³⁺ and Eu²⁺.
Given below are two statements: Statement I: The number of pairs, from the following, in which both the ions are