snif (iii –chorak) 2-variant

7 snif (iii –chorak) 2-variant 1. ) og’ir suv oddiy suvdan nima bilan farq qiladi? (96,3,43) a)qo’shimchalar miqdorini ko’pligi b)kislorodning izotop tarkibi c) vodorodning izotop tarkibi d)molekulada protonlar soni har xil bo’lishi e) molekulasida elektronlar soni har xil bo’lishi. 2. ) qaysi qator oksidlari faqat suv bilan reaksiyaga kirishadi? a)cuo, ho, feo b)no, mgo, cuo c)alo, sio, nao d)bao, ko, po e)zno, mno, co 3) tabiy suvdagi og’ir suvning miqdori 0,02 % ni tashkil etsa, 500 g shunday suvdagi og’ir suv molekulalari sonini xisoblang. (02.11.6) a)6∙10 b)3∙10 c)6∙10 d)3∙10 e)4,03∙10 4) oddiy va og’ir suv aralashmasidagi kislarodning massa ulushi 86%. og’ir suvning massa ulushini (%) toping. (02.3.37) a) 30,5 b)32,6 c)31,5 d)33,5 e)34,5 5) ) evdiometirda 10 ml vodorod bilan …

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