For students all specialities

INDIVIDUAL WORK-10

For students all specialities

MODUL2

	The serial number of an element, which has the first electron on the 6 р -sublevel, is equal:
a
b
c
d
f

	Which of the given statements is correct:
a	Energy of ionization of atom of potassium is smaller, than energy of ionization of atom of sodiu
b	Energy of ionization of atom of wolfram is smaller, than energy of ionization of atom of molibdenenum
c	Electronegativity of atom of chlorine is larger, than electronegativity of atom of sulfur
d	In tantalum the metal properties are expressed stronger, than in a niobium
f	Oxidizing activity selenium is larger, than oxidizing activity of bromine

	Bromine has larger oxidizing properties, than iodine, because:
a	Radius of atom of bromine is greater, than radius of atom of an iodine
b	Oxidizing properties of iodine is greater, than oxidizing properties of bromine
c	Radius of atom of iodine is greater, than radius of atom of bromine
d	Electron affinity of atom of bromine is greater, than electron affinity of atom of iodine
f	Electron affinity of atom of iodine is greater, than electron affinity of atom of bromine

	On a basis of what laws has been made a sequence of elements: boron, nitrogen, oxygen, carbon:
a	In a free state these elements exist as two-atomic molecules
b	Elements of one subgroup
c	Elements of one series
d	Elements of one period

	Relative density of a hydrogen compound ЕН3 of an element by hydrogen is equal 8,5. This element is:
a	Antimonium
b	Arsenic
c	Phosphorus
d	Bismuth
f	Nitrogen

	At the decomposition of 25 g of a carbonate of twovalent metal was liberated 5,6 l carbon dioxide under normal conditions. The formula of the salt looks like:
a	SrCO3
b	CaCO3
c	MgCO3
d	BeCO3
f	BaCO3

	Polarization of chemical bond in a series of molecules HCl – HBr – HI:
a	Does not change
b	At first decreases, and then grows
c	Grows
d	At first grows, then decreases
f	Decreases

	Find charge of complex ion, charge, coordination number and covalency of the central atom in potassium hexacyanochromate (ІІІ), and also the sum of coefficients in the equation of reaction of exchange of this salt solution with a solution of copper sulfate:
a	3–, 3+, 6, 6, 9
b	3–, 3+, 4, 4, 4
c	2–, 2+, 6, 6, 9
d	2–, 2+, 6, 6, 8
f	3–, 3+, 6, 6, 5

	Which of the given formulas expresses value of constant of instability of the complex [Pt(NH3)4(OH)2]Br2 at complete dissociation of its complex ion:
a	Кinst=
b	Кinst=
c	Кinst=
d	Кinst=
f	Кн=

	Value for the reaction 2C6H6(g)+ 15O2 = 12CO2(g)+ 6Н2O(g), if react= –6338,96 kJ/mol; react= 82,39 J/mol×К, is equal to:
a	–6363,51 kJ/mol
b	–6383,51 kJ/mol
c	–6373,51 kJ/mol
d	–6343,51 kJ/mol
f	–6353,51 kJ/mol

	How will be changed the reaction rate for 2NO + O2= 2NO2 at increase of concentration of NO in 2 times, concentration О2 — in 3 times and simultaneous increase of pressure in 2 times:
a	Will increase in 64 times
b	Will decrease in 6 times
c	Will increase in 12 times
d	Will increase in 8 times
f	Will increase in 96 times

	Find the equilibrium constant for reverse reaction СО + Н2О = СO2+ Н2, if the equilibrium concentrations of substances make: [CO] = 0,004 mol/l; [Н2О] = 0,064 mol/l; [СO2] = 0,016 mol/l:
a	Кр= 3,8
b	Кр= 1,0
c	Кр= 2,6
d	Кр= 0,8
f	Кр= 1,8

Дата добавления: 2015-11-05