Chemistry Test ...

Which of the following statements about standard enthalpy of formation (Δ_fH^∘) is correct?

If the standard Gibbs energy change (ΔG^∘) for a reaction is 10 kJ/mol at 298 K, what is the value of the equilibrium constant K?

For a reaction with  ΔG^∘ = −25 kJ/mol at 298 K, what can be inferred about the equilibrium constant K?

A chemist has four bottles, each containing a pure monocarboxylic acid of formula C₈ H₁₆ O₂. The acids are (i) 2-ethyl-2-methylhexanoic acid, (ii) 2,2,3-trimethylpentanoic acid, (iii) 2,2-dimethyl-3-ethylbutanoic acid, and (iv) 3,3-dimethyl-2-ethylbutanoic acid. She performs two reactions with each acid: (A) decarboxylation with soda-lime at 630 K, and (B) HVZ bromination followed by treatment with aqueous KHCO₃. For which acid will the total mass of the organic product(s) obtained from reaction A equal exactly 0.500 times the mass of the organic product(s) obtained from reaction B when both reactions start with 1.00 g of the acid? (Assume 100 % yield and no loss of material; treat any stereoisomeric mixture as a single species.)

Which reaction is used to distinguish primary, secondary, and tertiary amines?

The complex [Co(NH₃)₅(NO₂)](NO₃)₂ can exhibit which type of isomerism?

Freon-12 (CCl₂F₂) is manufactured from tetrachloromethane via the Swarts reaction. What is the primary industrial use of Freon-12?

Conductance of   0.1 M KCl (conductivity =  X ohm⁻¹ cm⁻¹) filled in a conductivity cell is  Y ohm⁻¹.
If the conductance of 0.1 M NaOH filled in the same cell is  Z ohm⁻¹, the molar conductance of NaOH will be:

At 20^∘C, the Ag⁺ ion concentration in a saturated solution of Ag₂CrO₄ is  1.5 × 10⁻⁴ mole/litre.

At 20^∘C, the solubility product of Ag₂CrO₄ would be:

The solubility product of  AgCl  is 1.44 × 10⁻⁴ at 100^oC . The solubility of silver chloride in boiling water may be