49. Qaysi molekuladagi bog'ning qutbliligi kamroq?
A) MgO B) BeO C) SrO D) CaO
50. Kovalent bog’ning qutbliligi kamayib boradigan qatorni ko’rsating.
A) arsin, ammiak, fosfin;
B) vodorod bromid, vodorod xlorid, vodorod yodid;
C) ammiak, fosfin, arsin;
D) selen (IV) oksid, tellur (IV) oksid, oltingugurt (IV) oksid.
51. Quyidagi ba’zi elementlarning NEM qiymati berilgan: Na (1.01), K (0,91), H (2,1), Br (2,87), S (2,6),
C (2,5). Shu qiymatlarga asoslanib oltingugurtning qaysi elementli birikmasida qutblanish yuqori darajada
bo’lishini aniqlang.
A) natriy sulfid; B) kaliy sulfid;
C) vodorod sulfid; D) oltingugurt bromid.
52. Qaysi molekuladagi bog’ning qutbliligi kamroq?
A) berilliy oksid; B) magniy oksid;
C) kalsiy oksid; D) stronsiy oksid.
53. Qutbliligi eng kichik bo’lgan bog’ni ko’rsating.
A) H – S B) K – S C) S – O D) C – S
54. C – E bog’ning qutbliligi oshib borgan qatorni tanlang.
A) karbonat angidrid, uglerod (IV) sulfid, to’rtxlorli uglerod;
B) uglerod tetraftorid, metan, is gazi;
C) uglerod disulfid, uglerod (IV) oksidi,
uglerod to’rtftorid;
D) to’rtxlorli uglerod, is gazi, etan.
55. Qutbliligi katta bo’lgan bog’ni ko’rsating.
A) H – Cl B) H – Br C) H – I D) H – O
56. Quyidagi elementlar orasidagi bog’ning qutbliligi ortib borish tartibini toping
1) xlor – ftor; 2) brom - ftor; 3) yod – ftor;
4) brom - xlor; 5) yod – xlor; 6) yod – brom;
A) 4,6,5,1,2,3 B) 1,2,3,4,6,5
C) 4,5,6,1,2,3 D) 5,6,4,1,2,3
1. STRUKTURA FORMULALAR, σ- va π- BOG’LAR.
Zomin tumani 25-maktab Alimqulov Sirojiddin
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