問題一覧
1
The following reaction is given: N2(g)+3H2(g)—><—2NH3(g)+Q. Indicate which of the listed effects will not lead to an increase in the equilibrium concentration of the product of the reaction.
Increase in temperature
2
Which two ions have the same electron configuration?
Mg*2+ and F*-
3
The reaction A(g)+2B(g)—>3B(g) was found to have a kinetic equation of the form v=kcAcB. How will the rate of the reaction change if the volume of the reaction mixture is halved?
It will rise 4 times
4
Which of the equations express a stage of the synthetic scheme for the industrial production of nitric acid?
4NH3+5O2–>4NO+6H2O
5
Which of the described processes does NOT release hydrogen?
aluminium foil is placed in a container with concentrated nitric acid
6
Which of the reactions shown is substitutional?
Fe+2HI—>Fel2+H2
7
In a closed equilibrium system had constant pressure and temperature ,oxygen, carbon dioxide and carbon monoxide are found. The temperature in the system rises sharply and then remains constant. State what will be observed in the system if the reaction between oxygen and carbon monoxide is exothermic: A)The amount of oxygen will increase B)the amount of carbon monoxide will decrease C) the amount of carbon (IV) oxide will decrease D)the total amount of molecules will increase
A,C,D
8
State the process in which metal undergoes reduction
Reaction of Cooper (ll) oxide with hydrogen during heating
9
In which of the equilibrium systems does not the equilibrium shift in the same direction as temperature decreases and pressure increases?
C3H8(g)—><—C3H4(g)+2H2(g)-Q
10
Iron (lll) oxide is completely dissolved in the required amount of diluted sulfuric acid. A zinc granule is placed in the resulting solution. Indicate the type of the reaction that does not occur in the described experiment.
Reversible reaction
11
Which of the reactions is NOT a redux one?
(CuOH)2CO3–>2CuO+CO2+H2O
12
Which of the listed substances has a molecular crystal lattice in a solid aggregate state?
White phosphorus
13
Ammonia is passed through a solution of nitric acid, resulting in substance A. A concentrated solution of potassium hydroxide is then added to it on heating resulting in substance B. Nitrogenous substance B is:
Ammonia
14
Bromine reacts with all substances in the order
C2H6, NaI, Zn
15
Consider the reaction: 2NO(g)+Cl2(g)—><—2NOCl(g); ΔH>0 ,Which of the following conditions maximise the amount of Cl2(g) present at equilibrium?
Low temperature, low pressure
16
Which statement is NOT correct for the reaction N2(g)+O2(g)—><—2NO(g)?
The value of a equilibrium constant is the same at all temperatures
17
Which of the following statements about H2SO3, a diprotic acid is true ?
There is just one lone pair in the sulfur atom
18
For a reversible exothermic reaction, what is the effect of increasing temperature on the equilibrium constant (Keq) and on the forward rate constant (Kf)
Keq decreases and Kf increases
19
Which compound decolourises bromine in CHCl3
1-hexene
20
How many isomers exist for dibromobenzene (C6H4Br2)?
Three
21
What is the correct name for CCl4?
Tetrachloromethane
22
Which of the following region can be used to distinguish phenol from benzyl alcohol?
FeCl3
23
Give the IUPAC name of this compound: CH3OCH2CH3
methoxyethane
24
Which of the following compounds display optical isomerism?
CH3-CHCl-COOH
25
Which of the following segments is false regarding the reaction between Cl2 and C2H6
The reaction will give a single product of C2H5Cl
26
Ethanol can be oxidised stepwise . What is the first table intermediate product when ethanol is oxidised with a mild oxidation agent?
CH3CHO
27
Hydrolysis (saponification) of a fat would yield
Glycerol and soap
28
The segment -CH2CH2CH2CH2CH2CH2- represents the polymer named
polyethylene
29
The products of cracking are
alkane+alkene
30
What is the major organic products of a reaction CH3C-=CH+2HBr
CH3CBr2CH3
31
Which of the following reacts with [Ag(NH3)2]OH giving a white precipitate?
CH3CH2C-=CH
32
Which of the following is correct name for (CH3)2C=CHCOCH3
4-methyl1-3-penten-2-one
33
As a result of the interaction of acetylene with water in the presence of salts of divalent mercury ions the following is formed
CH3CHO
34
Sucrose dissolved in water is
Disruption of the sucrose crystal lattice
35
Linolenic acid as opposed to stearin acid
Decolourises bromine water
36
How is the compound HOCH2(CHOH)4CH2OH obtained?
By reduction with hydrogen from glucose and fructose