Question

Please, help me! Because tomorrow will be TEST!!!
1 Which one of the following is redox reaction:
A) HCI + AgNO3 = HNO3 + AgCI
B) 2HCI + 2Na = 2NaCI + H2
C) KOH + HNO3 = KNO3 + H2O
D) 2C+ O2 = 2CO
2 Which of the following reaction is spontaneous :
A)Cu+ (ag) + H2S =
B) Cu+(ag)+ H2O2(I) =
C) Ag+ (ag) + Cu (s)=
D) Ag(s)+ Cu+(ag)=
3.Copper metal can be oxidized in basic solution to form copper (l) oxide (2Cu(s)
Cu2O ) .What is the number hydroxide ions we need to add on a half-reaction for
this process?
A) 1
B) 2
C) 3
D) 4
4 Which of the following reaction is spontaneous :
A) Pb2+(ag) + Cr2+(ag) =
B) Zn2+(ag) +AI (s) =
C) AI3+(ag) + Ca(s) =
D) Cr3+(ag) + NI(s) =
5 What is the numbers of electrons lost by the sulfur atom in following reaction:
2SO2 + O2 = 2SO3
A) 1
B) 2
C)3
D)4
6 In below following reaction which element is reducing agent:
2Al + O2 = Al2O3
A) AI
B) O
6 In below following reaction which element is oxidizing agent:
2Al + O2 = Al2O3
A) AI
B) O
7 In below following reaction which element is oxidized:
2Al + O2 = Al2O3
A) AI
B) O
8 In below following reaction which element is reduced:
2Al + O2 = Al2O3
A) AI
B) O
9.Oxidation is:
A) loss electron
B) gain electron
10.Reduction is:
A) loss electron
B) gain electron
11 Would you use an oxidizing agent or reducing agent in order for the following
reactions to occur?
a. ClO -3
ClO2
b. SO 2-4
S2-
c. Mn2+
MnO2
d. Zn
ZnCl2
12 How will the rate of a chemical reaction change with increasing temperature
from 40 от to 80˚ С, if the temperature coefficient is 2?
13 How will the rate of a chemical reaction change when the temperature drops
from 40˚ to 20˚ С, if the temperature coefficient is 4?
14 The reaction at 50 ° C takes 2 minutes 20 seconds. How long does this reaction
end at a temperature of 70 ° C, if the temperature coefficient is 2?
15 The reaction rate upon cooling from 80 ° to 60 ° C decreased by 4 times. Find
the temperature coefficient of the reaction rate.
16 The chemical reaction in solution corresponds to the equation 3A + B = 2C.
Substances A and B are in a gaseous state. How will its speed change if:
a) reduce the concentration of substance B by 2 times, leaving the concentration of
substance A the same;

Answer 1

Answer:

1 Which one of the following is redox reaction:

A) HCI + AgNO3 = HNO3 + AgCI

B) 2HCI + 2Na = 2NaCI + H2

C) KOH + HNO3 = KNO3 + H2O

D) 2C+ O2 = 2CO✔

2 Which of the following reaction is spontaneous :

A)Cu+ (ag) + H2S =

B) Cu+(ag)+ H2O2(I) =

C) Ag+ (ag) + Cu (s)=

D) Ag(s)+ Cu+(ag)=

3.Copper metal can be oxidized in basic solution to form copper (l) oxide (2Cu(s)

Cu2O ) .What is the number hydroxide ions we need to add on a half-reaction for

this process?

A) 1

B) 2✔

C) 3

D) 4

4 Which of the following reaction is spontaneous :

A) Pb2+(ag) + Cr2+(ag) =

B) Zn2+(ag) +AI (s) =

C) AI3+(ag) + Ca(s) =

D) Cr3+(ag) + NI(s) =

5 What is the numbers of electrons lost by the sulfur atom in following reaction:

2SO2 + O2 = 2SO3

A) 1

B) 2

C)3

D)4✔

6 In below following reaction which element is reducing agent:

2Al + O2 = Al2O3

A) AI

B) O

6 In below following reaction which element is oxidizing agent:

2Al + O2 = Al2O3

A) AI

B) O

7 In below following reaction which element is oxidized:

2Al + O2 = Al2O3

A) AI

B) O

8 In below following reaction which element is reduced:

2Al + O2 = Al2O3

A) AI

B) O

9.Oxidation is:

A) loss electron

B) gain electron✔

10.Reduction is:

A) loss electron✔

B) gain electron

11 Would you use an oxidizing agent or reducing agent in order for the following

reactions to occur?

a. ClO -3

ClO2

b. SO 2-4

S2-

c. Mn2+

MnO2

d. Zn

ZnCl2

12 How will the rate of a chemical reaction change with increasing temperature

from 40 от to 80˚ С, if the temperature coefficient is 2?

13 How will the rate of a chemical reaction change when the temperature drops

from 40˚ to 20˚ С, if the temperature coefficient is 4?

14 The reaction at 50 ° C takes 2 minutes 20 seconds. How long does this reaction

end at a temperature of 70 ° C, if the temperature coefficient is 2?

15 The reaction rate upon cooling from 80 ° to 60 ° C decreased by 4 times. Find

the temperature coefficient of the reaction rate.

16 The chemical reaction in solution corresponds to the equation 3A + B = 2C.

Substances A and B are in a gaseous state. How will its speed change if:

a) reduce the concentration of substance B by 2 times, leaving the concentration of

substance A the same

Answer 2

$\huge\bf{Answer:-}$

Refer the attachment.