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Aim. Uz
1. What is the suffix of saturated carbohydrates?
A) "an"; B) "width"; E) "year"; D) "Ilene"; E) "wearing".
2. How many kg of Al can be obtained from 51 kg of Al 2 O 3 using electrons?
A) 22; B) 24; C) 27; D) 30; E) 29;
3. An iron plate with a mass was 40 kglowered into a solution of Cu So 4 . How many kg of iron will pass when the mass of the plate reaches 43 kg?
A) 15; B) 19; C) 21; D) 4; E) 2;
4. What is the mass of 1,12 lNH 3 measured in N.sh?
A) 0.85; B) 0.95; C) 1.05; D) 1.25; E) 1.50;
5. Find the ratio of the number of atoms in 5 moles of tetraphosphorus and 2 moles of ozone.
A)1;2; B) 1; 1.5; S) 1; 1 ; D)2;1; E) 1.5; 2;
6. In what processes does the law of conservation of mass not apply?
A) chemical; B) physical; C) electrochemical;
D) biochemical; E) nuclear;
7. What is the formula of the higher oxide of element number 31?
A) E 2 O ; C) E O ; S ) E O 2 ; d ) E 2 O 3 ; E) E 2 O 5 ;
8. Which of the metals forms a high-valent oxide?
A) Al; B) Fe; C)Cr; D) Mn; E) In
9. How many grams of O 2 react with 2.72 Al?
A) 9.6; B) 7.2; C) 4.8; D) 2.4; E) 11.2;
1 0. Which scientists shift the balance to the right in this reaction H 2( g ) +S( q ) H 2 S( g )?
1) increased pressure; 2) increase in H concentration;
decrease in the amount of H 2 S; 4) pressure drop;
a) 3.4; b) 2.3; c) 2.4; d) 1.3; e) 1,2.
11. How many pairs of electrons connect atoms in the graphic formula of H 2 SO 4 acid?
a) 6; b) 5; c) 6; d) 8; e) 7.
12. What is the name of the smallest particle that embodies the chemical properties of a substance?
a) atom; b) molecule; s) nucleus; d) cartridge; e) neutron.
13. If the electronic formula of an element ends with 3s 2 3p 5 , how many protons are there in its atom?
a) 13; b) 17; c) 14; d) 15; e) 16.
14. Which substance has valence of elements equal to 3?
1) CO; 2) S 2 O 3 3) NH 3 4) H 2 O
a) 1.2; b) 1.3; c) 2.3; d) 1.4; e) 2.4.
15. Which row contains only normal salts?
a) KHCO 3 KOH, MgOHCl; b) KU, Na Br, Mg SO 4 ; s) CO(HSO 4 ) 2 Ca( 4 CO 3 ) 2
d) KAL(SO 4 ) 2 KMnO 4 , Al(OH)SO 4 ; e) CuOHCl, Ba(HCO 3 ) 2 CaH 2 PO 4
16. Which compound has the highest level of oxidation of nitrogen?
) NH3 ; b) NH 4 Cl, C(NH 4 ) 2 ; s) O 4 ; d) NH 4 OH; e) is the same in all.
1 7. What is the sum of coefficients in the following equation? HCl+KMnO 4 KCl+MnCl 2 +Cl 2 +H 2 O
a) 10; b) 6; c) 46; d) 35; e) 36.
18. Which element can x be in the following change?
Z n+Znx H 2 x Na 2 x Pbx
a) O 2 ; b) C; s) S; d) N 2 ; e) Cl 2 .
19. Structure - trans isomerism is characteristic of what substance?
a) 1 bitun; b) 2 metal propellers; s) 2 nental; d) dekhlo ethane; e) 2 butane.
20. Which scientist discovered that acetic aldehyde is obtained from acetylene?
a) Butlerov; b) Kikulin; s) Markanorov; d) Lebidiv; e) Kuriv.
21. Show the monomer of natural rubber.
a) 2 lityl 1.3 butadiene; b) 2 methyl 2 whole; c) 1.3 butadiene;
d) 1.2 butadiene; e) 2 chlorine 1.3 butadione.
22. Which of the following substances are isomers?
a) octane; b) 2 methyl octane; c) 2 methyl dectane;
d) nonan; e) dean.
23. What reaction can be used to prove that natural rubber is unsaturated?
a) hydration; b) polymerization;
s) potassium permanganate solution and some water by decolorization;
d) fragmentation; e) merger.
24. Synthetic rubber (when) was first obtained through which hydrocarbon?
a) from isonren; b) butadiene 1.3; c) butadiene 1.2;
d) Enculengan; e) from propylene.
25. What is the difference between rubber and rubber?
a) degree of pamelization; b) monomer composition;
s) has rubber sulfate bridges; d) rubber has sulfate bridges;
e) molar masses.
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