What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)

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#Question id: 20242

#XL - P Chemistry

The correct order of the O – O bond length in O₂ , H₂O₂ and O₃is

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#Question id: 20243

#XL - P Chemistry

The bond order of O ^-₂  is

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#Question id: 20244

#XL - P Chemistry

Choose the incorrect statement.

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#Question id: 20245

#XL - P Chemistry

Which of the following is not paramagnetic ?

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#Question id: 20246

#XL - P Chemistry

Which one of the following compound has sp² hybridization ?

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#Question id: 20247

#XL - P Chemistry

C₂H₆ (g) + 3.5 O₂ (g) →2CO₂ (g) + 3H₂O (g)

ΔSvap (H₂O, l) = x1 cal K^–1 (boiling point + T₁)

ΔHf (H₂O, l) = x₂

ΔHf (CO2) = x₃

ΔHf (C2H6) = x₄

Hence ΔH for the reaction is –