nazorat ishi. Test Qaysi moddada elementlarning valentligi ga teng?

3-Nazorat ishi. Test

1. Qaysi moddada elementlarning valentligi 3 ga teng?
1) CO; 2) S₂O₃ 3) NH₃ 4) H₂O

a) 1,2; b) 1,3; s) 2,3; d) 1,4; e) 2,4.

2. QAysi qatorda faqat normal tuzlar yozilgan?

a) KHCO₃ KOH, MgOHCl; b) KU, Na Br, Mg SO₄; s) CO(HSO₄)₂ Ca(₄CO₃)₂

d) KAL(SO₄)₂ KMnO₄, Al(OH)SO₄; e) CuOHCl, Ba(HCO₃)₂ CaH₂PO₄
3.. QAysi birikmada azotning oksidlanish darajasi yuqori?

a) NH₃; b) NH₄Cl, C(NH₄)₂; s) O₄; d) NH₄OH; e) hammasida bir xil.

4.. Quyidagi tenglamada koyfisentlar yig`indisi nechaga teng? HCl+KMnO₄ KCl+MnCl₂+Cl₂+H₂O

a) 10; b) 6; s) 46; d) 35; e) 36.

5. Quyidagi o`zgarishda x qaysi element bo`lishi mumkin?

Zn+Znx H₂x Na₂x Pbx

a) O₂; b) C; s) S; d) N₂; e) Cl₂.

6.. Tasis – trans izomeriya qaysi moddaga xos?

a) 1 bitun; b) 2 metall propel; s) 2 nental; d) dexlo etan; e) 2 butan.