پرسیاری وزاری کیمیا 2022-2023 خولی دووەم ، خوێندنی ئینگلیزی

Which of the following statements is correct about an aqueous solutions of KCl and sucrose, with
same concentration

This reaction

2NO₂(g)→N₂O₄(g)+ energy , is spontaneous at

 In one of the following reactions a substance acts as both an oxidizing agent and reducing
agent at the same time

By dissolving aluminum sulfate in water, 0.3 moles of aluminum ions are produced, how many
moles of sulfate ions are produced

A reaction has ∆H0=206.1kJ/mol and ∆S0=0.215kJ/(mol.K) at room temperature, which of the
following is correct

The ions in voltaic cells is transferred by

Which of the following solutions would contain the lowest concentration of hydronium
ions(⁺H₃O)

 Is a type of energy transferred spontaneously from a matter at higher temperature to a matter
at lower temperatur

Which metal would best provide cathodic protection from corrosion for an iron bridge? IfE0reduce for                  ( Fe²⁺,Mg²⁺, Sn²⁺, Cu²+, Al³⁺) respectively is (-0.41, -2.37, -0.14, 0.34 ,-1,66) volt

The chemical formula of chlorite is

. The slowest step in a reaction mechanism is called

When silver is electroplated onto another metal, Ag is

One of the following compounds is not Bronsted-Lowry acid

One of the following does not change by changing temperature

 Ore bauxite is used to produce……………by electrolysis

Is an acid used in the manufacture of detergents and ceramics

This reaction: A+2B→ C , is second order, found when [B] was doubled, the reaction rate
doubled, which of the following is correct

Which of the following types of molecular representations can be used to show differences
between isomers

If   [Mg²⁺]³[PO4^3-]²<Ksp

the net ionic equation for neutralization reaction of H₃PO₄ and Mg(OH)₂  is

In the following reaction: 2NO₂→2NO+O₂ , the first step reaction is: (NO₂→NO+O), which
of the following is a second step reaction

For this reaction :
2Li⁺+Zn→2Li+Zn⁺²

which of the following is correct

E^o _reduce Li⁺=-3.04V , E^o  _reduce  Zn⁺²=-0.76V

:An aqueous solution of sulfuric acid contains all of them except

?In which of the following equilibrium systems the concentration of products is highest

The correct name for the following compound

‏

according IUPAC system is

The required mass of Ca(OH)₂ in 500mL of its solution to make pH equal to 13 is  (molar mass=74g/mol)

Is a salt when dissolved in water increases hydroxide ion concentration

A compound  C₇H₁₂is called

?Which of the following solutions is an acid at 25oC

The concentration of fluoride ions in a saturated solution of CaF₂ is 2.2×10^-3mol/L , the K_SP value  equal:

Which of the following properties for diamond is incorrect

?By heating 500mL of pure water to 50oC which of the following relationships is correct

The following gaseous reaction: ( 2SO₂+O₂⇔2SO₃+198kj ), reached equilibrium at 600^oC ,at which of the following temperature the value of equilibrium constant (K) is highest

  The name of this compound

according IUPAC system is

. In the reaction between dilute sulfuric acid and barium metal produce……….and hydrogen gas

Which of the following reactions the equilibrium shifts to left direct by decreasing
system volume

Which of the following hydrocarbons is less chemically reactive

 By titration 17.6mL of diprotic acid solution neutralized 27.4mL of 0.0165 M KOH solution, the
molarity of acid is

 All of the following solutions can resist changes in pH by addition a small amount of an acid or
base except:

The type of this organic reaction

‏

In the following reaction: A₂B+80kJ →2A+B , Eaʻ= 20kJ/mol and the reactants’
energy is -20kJ/mol , the activated complex energy is equal

In this reaction

one of the following is oxidized

Are organic compounds in which the carbonyl group is attached to carbon atoms within the
chain

One of the following salts is insoluble in water

If 3.5kJ of energy are added to a 28.15g sample of iron at 20oC, the final temperature of the
iron in kelvins is: (c_p=0.449J/(g.K))

After balancing the following half-reaction

 : (MnO₂→Mn₂O₃) in basic solution, Mn

Is a poisonous alcohol is used as octane enhancers in fuel and as alternative fuels

? The molal concentration of an aqueous CaCl2 solution that freezes at -2.43^oC is

(K_f = -1.86^oC/m)

 The standard enthalpy of formation for each of CO₂(g),H₂O(l) and C₅H₁₂ respectively is
(-394,-286,-147)kJ/mol, the enthalpy of combustion of pentane is

? In which of the following compounds the oxidation number of xenon is highest

In many organic reactions ,an ether is used as a solvent instead of