Very high ionization energy and weak metallic bond
3) High atomic mass
4) Very low ionization energy and strong metallic bond
5) None of these
Задание #173
Вопрос : Which of these metal elements will form an alkali when dropped into cold water?
1) zinc 2) iron 3) lead 4) aluminium 5) calcium
Задание #174
Вопрос : Which of the following is a redox reaction?
1) Zn + 2AgCN → 2Ag + Zn (CN)2
2) NaCl + KNO3 → NaNO3 + KCl
3) NH4OH → NH3 + H2O
4) Mg(OH)2 + 2NH4Cl → MgCl2 + 2NH4OH
5) CaC2O4 + 2HCl → CaCl2 + H2C2O4
Задание #175
Вопрос : A coordination compound in which the complex ion is neutral is ...
1) [Cr (NH3)6] Cl3
2) [Cu (NH3)4] [PtCl4]
3) H2[PtCl4]
4) K4 [Fe (CN)6]
5) [Co Cl3 (NH3)3]
Задание #176
Вопрос : In the complex [Fe(H2O)5 (NO+)]SO4. The oxidation state of iron is:
1) +6 2) +1 3) 0 4) +3 5) +2
Задание #177
Вопрос : Which of the following statement is correct?
1) Copper reacts with very dil. HNO3 to produce NH4NO3
2) Copper reacts with dil. HNO3 to produce NO2
3) Copper reacts with dil. HNO3 to produce N2
4) Copper reacts with conc. HNO3 to produce NO2
5) Copper reacts with conc. HNO3 to produce of mixture of NO and NO2
Задание #178
Вопрос : If the electrode potentials of both the electrodes become equal in magnitude but opposite in sign then:
1) none of these
An electrochemical cell is reversed
3) an electrochemical cell is first working then stop
4) an electrochemical cell starts working
An electrochemical cell stops working
Задание #179
Вопрос : Which gas is liberated when red hot Zn is dipped in water?
1) ZnO 2) Zn vapours 3) H2 4) Steam 5) O2
Задание #180
Вопрос : The standard electrode potential is measured by ...
1) Amperemeter
Voltmeter
3) Electrometer
4) Galvanometer
5) Pyrometer
Задание #181
Вопрос : Where does the acid base indicator - litmus gain of red colour?
1) Ba(NO3)2 2) KNO3 3) Na3PO4 4) KCl 5) CuCl2
Задание #182
Вопрос : Calculate the equivalent weight (g/mol) of the reducing agent in the reaction: 
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1) 16 2) 32 3) 8 4) 80 5) 160
Задание #183
Вопрос : What salt aqueous solution will have alkaline medium (pH>7)?
1) Pb(NO3)2 2) MgSO4 3) FeSO4 4) Ag2SO4 5) К2S
Задание #184
Вопрос : Calculate the equivalent weight (g/mol) of the oxidant in the reaction: 
1) 18,25 2) 63 3) 43,5 4) 87 5) 36,5
Задание #185
Вопрос : Water hardness is characterized by the presence of dissolved salts of calcium and magnesium bicarbonates, called...
1) permanent hardness
2) total
Temparary hardness
4) non-carbonate
5) technical
Задание #186
Вопрос : A current of 2 Ampere was passed through solutions of CuSO4 and AgNO3. The weight of copper deposited is 0.636 g. What is the weight of silver deposited?
1) 3.16g 2) 4.32g 3) 1.07g 4) 2.61g 5) 2.14g
Задание #187
Вопрос : In which among the following are the noble metals soluble?
1) NaOH 2) NH4OH 3) H2SO4 4) Aqua regia 5) Water gas
Задание #188
Вопрос :Transition elements are mostly used in construction materials because they are ...
1) rigid and flammable
Hard and rigid
3) flammable and soft
4) hard and shiny
5) heavy and fusible
Задание #189
Вопрос : Which salt is hydrolyzed by cation?
1) KCl 2) Na2SiO3 3) ZnCl2 4) Fe(CH3COO)2 5) Na3PO4
Задание #190
Вопрос : Determine the standard EMF of the cell: 
1) +0,23В 2) +0,65В 3) +0,44В 4) -0,65В 5) +0,32В
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Задание #191
Вопрос : Which among the following is not a usage of standard hydrogen electrode?
Used in acid-base titrations
2) Used for pH measurement of a given solution
3) Used as a primary reference electrode
4) Used for measurement of standard electrode potential of metal in electrochemical cell
5) Used for measurement of alkali metal cations concentration in a given solution
Задание #192
Вопрос : Which of the following are reduced in the following redox reaction?
Fe2+ + MnO4- + 8H+ = Fe3+ + Mn2+ + 4H2O
1) MnO4- 2) H+ 3) H2O 4) Fe2+ 5) H2SO4
Задание #193
Вопрос : The oxidation number of N in NaNO2 is:
1) -3 2) +4 3) +3 4) +5 5) +2
Задание #194
Вопрос : Select a typical reducing agent:
1) Сompound of iron (III) Fe3+
2) K2Cr2O7
3) KMnO4
4) HNO3
5) H 2 О2
Задание #195
Вопрос : In a coordination sphere, the atom/ion (usually metal) to which a fixed number of ions/moleculas/groups are bound in a definite geometrical arrangement around it, is called:
1) Central atom 2) Cation 3) Anion 4) Ligand 5) Complex ion
Задание #196
Вопрос : The greatest rate corrosion will be observed between a pair of metal:
1) Ni-Fe 2) Ni-Ag 3) Ni-Sn 4) Ni-Cu 5) Ni-Pb
Задание #197
Вопрос : The oxidation state of central atom in the anion of compound NaH2PO2 willbe ...
1) 0 2) + 3 3) + 5 4) + 1 5) - 3
Задание #198
Вопрос : The reaction of the salt with water, whereby the salt is dissociated and decomposed to form a weak electrolyte is called ……………
1) corrosion 2) dissolution 3) dissociation 4) hydrolysis 5) electrolysis
Задание #199
Вопрос : What is the equivalent weight of KMnO4 when it is converted in MnSO4?
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1) M/2 2) M/3 3) M/6 4) M/1 5) M/5
Задание #200
Вопрос : When iron rusts, which of these ion-electron equations is correct?
1) Fe(s) → Fe3+ + 1e-
2) Fe2+(aq) + 2e → Fe(s)
3) Fe(s) → Fe(aq)
4) Fe(s) → Fe2+ + 2e-
5) Fe(s) → Fe2+ - 2e-
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