Fanining stexiometrik qonunlari

9. Allotropik shakl o’zgarishlariga ega bo’lmagan moddani toping.

A) uglerod B) fosfor C) oltingugurt D) astat

10. Allotropik shakl o’zgarilarga ega bo’lgan IV guruh elementini ko’rsating?

A) C B) P C) O₂ D) S

11. Allotropik shakl o’zgarishga ega bo’lgan moddalar qatorini aniqlang.

1) mis; 2) bor; 3) oltingugurt; 4) brom;

5) radon; 6) kislorod; 7) bariy; 8) fosfor;

A) 3,6,8 B) 1,2,5 C) 3,4,7 D) 2,3,7

12. Allotropik shakl o’zgarishni hosil qiladigan elementlar qatorini toping.

A) kislorod, xlor, ftor, bariy;

B) fosfor, qalay, selen, tellur;

C) qalay, ftor, yod, litiy;

D) oltingugurt, uglerod, astat.

13. Tarkibida allotropik shakl o’zgarishli elementlar bo’lgan moddalarni toping.

1) CS₂; 2) BeCl₂; 3) Sc₂S₃; 4) KI; 5) PH₃;

6) NH₃; 7) K₂Se; 8) SnBr₂;

A) 2,4,5,7 B) 1,3,4,6,8

C) 3,5,6,7,8 D) 1,3,5,7,8

14. Tarkibida allotropik shakl o’zgarishli elementlar bo’lmagan moddalarni toping.

1) CS₂; 2) BeCl₂; 3) Sc₂P₃; 4) LiI; 5) PH₃;

6) NF₃; 7) K₂O; 8) SnBr₂;

A) 2,4,6 B) 1,3,4,6,8 C) 3,5,6,7,8 D) 1,7,8