Ka Value Of Formic Acid

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The Ka value of formic acrid and acetic acrid are respectively$\mathrm{i}.77\times {10}^{-4}$ and$1.75\times {10}^{-5}$. The ratio of the acid strength of 0.ane Due north acids is

1. 0.1

ii. 0.3

3. iii.178

4. 100

• (1)

• (ii)

• (3)

• (4)

Subtopic:   Ionisation Constant of Acid,Base &Table salt |

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ZnS is not precipitated by passing H_iiS in an acidic medium but CuS is precipitated. The reason for information technology is

1. ${\mathrm{M}}_{\mathrm{sp}}\mathrm{CuS}<<{\mathrm{K}}_{\mathrm{sp}}\mathrm{ZnS}$

ii.${\mathrm{K}}_{\mathrm{sp}}\mathrm{CuS}>>{\mathrm{G}}_{\mathrm{sp}}\mathrm{ZnS}$

3. ${\mathrm{Yard}}_{\mathrm{sp}}\mathrm{CuS}={\mathrm{K}}_{\mathrm{sp}}\mathrm{ZnS}$

4. None of these

• (1)

• (ii)

• (3)

• (iv)

Subtopic:   Solubility Product |

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Consider the following acids:

I. HCN

II. CH₃COOH

III. HCOOH

4. Cl-CH_twoCOOH

The correct order of forcefulness is

i. 2>Iii>I>IV

2. IV>Two>3>I

3. IV>3>II>I

4. Iii>2>IV>I

• (1)

• (2)

• (3)

• (4)

Subtopic:   Acids & Bases - Definitions & Classification |

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The hydrogen ion concentration is 0.two M ethanoic acrid$({\mathrm{Yard}}_{\mathrm{C}}=2\times {10}^{-\mathrm{five}}\mathrm{mol}{\mathrm{dm}}^{-\mathrm{iii}})$ is approximately

1.${10}^{-4}$

2.$\mathrm{two}\times {10}^{-\mathrm{two}}$

3.$\mathrm{ii}\times {\mathrm{ten}}^{-6}$

4.$2\times {10}^{-3}$

• (1)

• (two)

• (3)

• (iv)

Subtopic:   Ionisation Constant of Acid,Base &Common salt |

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The pH of a solution made by mixing 50 mL of 0.01 Yard barium hydroxide solution with 50 mL of H₂O is

i. 3.0

ii. vi.0

3. 12.0

four. 15.0

• (i)

• (2)

• (3)

• (4)

Subtopic:   pH calculation |

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Observe the molar solubility of Fe(OH)_three in a buffer solution that 0.10 M in NH_fourCl and 0.ten M in NH_three. If${\mathrm{K}}_{\mathrm{b}}\left({\mathrm{NH}}_3\right)=\mathrm{ane}.\mathrm{eight}\times {\mathrm{x}}^{-5}$ and${\mathrm{K}}_{\mathrm{sp}}\left[\mathrm{Atomic\; number\; 26}{\left(\mathrm{OH}\right)}_{\mathrm{three}}\right]=2.\mathrm{six}\times {10}^{-39}.$

1.$\mathrm{iv}.458\times {\mathrm{x}}^{-25}\mathrm{M}$

2.$3.458\times {10}^{-25}\mathrm{M}$

3.$2.229\times {\mathrm{ten}}^{-24}\mathrm{M}$

4.$4.458\times {10}^{-22}\mathrm{M}$

• (1)

• (2)

• (3)

• (four)

Subtopic:   Solubility Product |

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A base dissolved in water yields a solution with a hydroxyl ion concentration of 0.05 mol litre^-1. The solution is

one. bones

two. acid

3. neutral

iv. either 2 or three

• (ane)

• (2)

• (3)

• (4)

Subtopic:   Acids & Bases - Definitions & Classification |

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Ionization constant of CH_threeCOOH is$1.7\times {10}^{-5}$ and concentration of H⁺ ion is$3.4\times {10}^{-4}$. Then initial concentration of CH₃COOH is

1.$3.\mathrm{iv}\times {10}^{-4}$

2.$3.4\times {10}^{-\mathrm{three}}$

3.$6.\mathrm{eight}\times {\mathrm{ten}}^{-4}$

iv.$6.8\times {10}^{-3}$

• (1)

• (two)

• (3)

• (4)

Subtopic:   Ionisation Abiding of Acid,Base of operations &Salt |

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At$25°\mathrm{C}$ the dissociation abiding of a base of operations, BOH is$1.0\times {10}^{-12}$, the concentration of hydroxyl ions 0.01 Thousand aqueous solution of the base of operations would become

1.$\mathrm{two}.0\times {10}^{-6}\mathrm{mol}{\mathrm{Fifty}}^{-1}$

ii.$\mathrm{i}.0\times {\mathrm{x}}^{-5}\mathrm{mol}{\mathrm{L}}^{-\mathrm{i}}$

3.$1.0\times {10}^{-6}\mathrm{mol}{\mathrm{L}}^{-1}$

4.$\mathrm{one}.0\times {10}^{-\mathrm{vii}}\mathrm{mol}{\mathrm{50}}^{-\mathrm{one}}$

• (i)

• (2)

• (3)

• (4)

Subtopic:   Ionisation Abiding of Acid,Base of operations &Table salt |

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The solubility production of AgI at$25°\mathrm{C}$ is$1.0\times {\mathrm{x}}^{-\mathrm{sixteen}}{\mathrm{mol}}^2{\mathrm{L}}^{-\mathrm{two}}$. The solubility of AgI in 10^-four N solution of KI at$25°\mathrm{C}$ is :  (in mol L^-1)

1.$1.0\times {10}^{-\mathrm{x}}$

two.$1.0\times {\mathrm{ten}}^{-\mathrm{eight}}$

iii.$\mathrm{one}.0\times {10}^{-16}$

4.$1.0\times {10}^{-12}$

• (1)

• (2)

• (3)

• (4)

Subtopic:   Solubility Product |

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Ka Value Of Formic Acid,

Source: https://www.neetprep.com/question/191608-Ka-value-formic-acid-acetic-acid-respectivelyand-ratio-acid-strength--N-acids----?courseId=8

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