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4. Yangi mavzuni mustahkamlash:
Savol va topshiriqlarni bajarish.
a)
Azot atomi oksidlanish darajasi faqat +5 ga oksidlanganlarni tanlang.
1) NO
2
+ O
2
+ NaOH = NaNO
3
+ H
2
O 2) NO
2
+ H
2
O = HNO
3
+ NO
3) NO
2
+ NaOH = NaNO
3
+ NaNO
2
+ H
2
O 4) NO
2
+ HJ = NO + J
2
+ H2O
5) NO
2
= NO + O
2
6) NO
2
+ O
2
+ H
2
O = HNO
3
A) 1, 2, 3, 6 B) 2, 6 C) 1, 6 D) 4, 5, 6.
b)
Azot atomining oksidlanish darajasi faqat +2 ga qaytarilganlarini tanlang.
1) NO
2
= NO + O
2
2) NO
2
+ O
2
+ H
2
O = HNO
3
3) NO
2
+ H
2
O = HNO
3
+ NO
4) NO
2
+ HJ = NO + J
2
+ H
2
O 5) NO
2
+ NaOH = NaNO
3
+ NaNO
2
+ H
2
O
6) NO
2
+ H
2
O + SO
2
= H
2
SO
4
+ NO
A) 1, 4, 6 B) 2, 5 C) 3, 5, 6 D) 1,3,4, 6.
