پرسیاری وزاری کیمیا 2023-2024 خولی یەکەم ، خوێندنی ئینگلیزی

The anion of the salt of a weak acid and strong base

In the following reaction: 2A→C+E , the value of specific rate constant is 0.02s^-1, when the rate of reaction is 5×10^-6M.s^-1 ,the reactant concentrations is equal to

When an automobile battery is charging:

Which of the following is correct for binary acid nomenclature

A chemical reaction is in equilibrium when

The structural formula and molecular formula of a compound are similar in

Which of the following chemical equation is incorrect

Which of the following is correct in an aqueous solution of  0.5M  Na₂CO₃‏

Which of the following is incorrect

The pH of pure water

By adding hydrogen chloride gas to saturated solution of sodium chloride, at new equilibrium

Hydrocarbons are classified according to the

Which of the following is correct for this indicator: HIn↔H⁺+In‏^–, in the basic solution

The number of moles Hg⁺² in 1000L of a saturated solution of HgS is: if (K_SP=1.6×10^-52)

The number of hydrogen atoms for (2-methyl-1,3-butadiene) is equal to:

If the pH of a solution is 3  ,then

In the following gaseous equilibrium system: 2CO+O_2↔2CO₂ +energy , which of the following
has no effect on the equilibrium shift

The name of the following compound:

,  according to IUPAC system is:

In a titration,26.9 mL of 3.4×10^-3M Ba(OH)₂ neutralized 16.6 mL of HCl solution.

What is the molarity of acid

All of the following situations the reactions go to completion except

Which of the following is conjugate pair

This reaction

2NO(g)+O₂(g) → 2NO₂(g)+114.2kJ

The oxidation number of carbon in which of the following is -4

n the following equilibrium reaction: 2A(g) ↔ 2B(g)+C(g) ,at 35^oC it is determined that
: $\left[A\right]=0.003M$ , $\left[B\right]=0.09M$ , $\left[C\right]=0.01M$

at equilibrium, by cooling the reaction to 10^oC‏

the value of K will be 5,which of the following is correct?

If 3.563kj of energy added to 55g sample of aluminium, how much temperature in kelvin will
rise of the sample? ( C_p=0.897J/(g.K))

In this reaction

‎ PbS(s)+4H₂O₂→PbSO₄+4H₂O

the atoms of………..are oxidized

All of the following are buffer solutions except

How many moles of anion are produced by dissolving 0.15mol of aluminium acetate

Calculate the standard enthalpy of formation (ΔHf⁰) of CH4, if the standard enthalpy of combustion for each of H₂ ,C and CH₄ is equal (-286,-394,-891) k_J/mol respectively.

The hydrogen acts as oxidizing agent in the reaction

The molecular formula for the compound……………… is C₆H₁₄

A solution consists of 3.13g of a nonelectrolyte solute in 38g of water, the boiling point of the
solution is higher than the boiling point of pure water by 1^oC, the molar mass of solute is:

K_b=0.51^oC/m

In a reaction at 25^oC , ΔG^o=91kJ/mol, ΔS^o=0.2855kj/(mol.K) the value of ΔHois equal to

In this half-reaction  ClO₃^– → Cl-, Cl:

The value of E⁰ cell for this spontaneous electrochemical reaction:M⁺²+H₂→M+2H ⁺

is 0.37V ,then E⁰ reduce M⁺²  is:

A compound that ionizes and contains the highest concentration of ions is

If the standard enthalpy of formation for each of SO₂ , C₂H₂, HI and CO₂is equal
(-296.8,+226.7,+26.5,-394) kJ/mol respectively, which of the following is more stable

In which of the following the oxidation process has occurred

?Which of the following has the higher vapour-pressure

. In a reaction the value of E_a=126kj/mol, E_a^–=86kj/moland the product energy level is 40 kJ/mol, then the reactant energy level is equal to

The cathode half- reaction equation in mercury batteries is

Which of the following pairs of an aqueous solutions produces barium sulfate precipitate when
combined

The minimum energy required for an effective collision is

This reaction: Mg+Sn⁺²→ ,will occur spontaneously as written, which of the following is
correct?

A volatile, unstable acid when is pure, it is used in making explosives is

In the following reaction:A+2B→C ,the overall order of reaction is 3,doubling [B] quadruples
the rate of reaction, which of the following is correct

The………… process is occur at cathode of electroplating cell

In the reaction NH₃ with Ag⁺ions, ammonia acts as

The following data relate to the reaction   2H₂O→H₂O+O₂ which of the following is correct

If a strip of nickel were dipped into a solution of AgNO₃‏ , what would be expected to occur?if Eoreduce Ni2⁺, Ag⁺equals (-0.23,+0.80) volt respectively