The conjugate bases of Bronsted acids H2O and HF are respectively:
1. H3O+ and H2F+, respectively
2. OH- and H2F+, respectively
3. H3O+ and F-, respectively
4. OH- and F-, respectively
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologypH of a saturated solution of is 9. The solubility product of is:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich will make basic buffer:
1. 100 mL of 0.1 M HCl+100 mL of 0.1 M NaOH
2. 50 mL of 0.1 M NaOH+25 mL of 0.1 M CH3COOH
3. 100 mL of 0.1 M CH3COOH+100 mL of 0.1 M NaOH
4. 100 mL of 0.1 M HCl+200 mL of 0.1 M NH4OH
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe hydrogen ion concentration of a 10-8 M HCl aqueous solution at 298 K (Kw = 10-14) is :
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following pairs constitutes a buffer?
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor the reaction,
CH4(g) + 2O2(g) CO2(g) + 2H2O(l)
ΔrH = -170.8 kJ mol-1
Which of the following statements is not true?
1. At equilibrium, the concentration of and water (l) are not equal.
2. The equilibrium constant for the reaction is given by
3. Addition of at equilibrium will cause a shift to the right
4. The reaction is exothermic
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following orders correctly represents the increasing acid strengths of the given acids?
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich ionic species has the greatest proton affinity to form stable compounds?
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe following equilibrium constants are given :
N2 + 3H22NH3; K1
N2 + O22NO; K2
H2 + 1/2O2H2O; K3
The equilibrium constant for the oxidation of NH3 by oxygen to give NO is:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA weak acid, HA, has a Ka of 1.00×10-5. If 0.100 mole of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to :
1. 99.0%
2. 1%
3. 99.9%
4. 0.100%
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology