A paxta zararkunandalariga qarshi

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A)Paxta zararkunandalariga qarshi                                                       

 

 

                                                            

C)Metal yuzasi bilan ishqalanishini kamaytiruvchi modda               

 

 

 

2. Shtativdagi qaysi moslamadan tubi yassi va konussimon kolbalar, stakanlar, chinni kosachalarda moddalarni 

qizdirishda foydalaniladi?                                                                                                                                                                                 

A) Qum yoki suv hammomi                                                                    B) Asbest to’rli taglik                                                                                 

C) Halqali tutqich                                                                                      D) O’zak 

3. Propargil spirit hosilalari va geterosiklik birikmalarni o’rgangan olim?                                                                                     

A)Y.T.Toshpo’latov             B)A.G’.Mahsumov          C)N.A.Parpiyev                D)A.A.Abduvohobov 

4.  Qaysi gaz yonmaydi, lekin yonishga yordam beradi?                                                                                                                                

A) Kislorod                           B) Vodorod                       C) Karbonat angidird        D) Azot 

5. Atomlarning muayyan turi bu….                                                                                                                                               

A)molekula                         B)modda                             C)kimyoviy birikma           D)kimyoviy element 

6. Oqsillarning kimyoviy tuzilishi va ularning organizmga ta`siri to`g`risida ilmiy maktab yaratgan, feramon 

tutqichlarini yaratgan olim kim?                                                                                                                                                                       

A) Sh.I. Solihov                    B) A.A Abduvahobov          C) A.G` Mahsumov            D)  H.U. Usmonov 

7. Quyidagi qaysi metall kerosin ichida saqlanadi?                                                                                                                                

A)rux                                       B)natriy                               C)kadmiy                              D)qalay 

 

8. Alanganing qaysi qismi chetlari xira eng issiq bo’ladi?                                                                                                                               

A) Yuqori                                   B) O’rta                                C) Pastki                              D) Chetki 

9. .Laborotoriyada ortib qolgan Na metali nima qilinadi?                                                                                                                                

A) Suvda eritiladi                     B) Kerosin ostida saqlanadi     C) Yondiriladi            D) Spirtda eritiladi 

10. Kimyo fanining pedmeti nima?                                                                                                                                                                   

A) Tabiiy moddalar               B) Sintetik moddalar                    C) Jismlar                 D) Tabiiy va sintetik moddalar 

11. Yonish va oksidlanish jarayonlari haqidagi nazariya kimga tegishli?                                                                                                 

A) Lomonosov                         B) Dalton                                         C) Shtal                  D) Lavuazye 

12. Element atomi massasini uglerod 12 izatopi atomi massasining 1/12 (o‘n ikkidan bir) qismidan necha marta 

og‘irligini ko‘rsatuvchi kattalik nima deyiladi?                                                                                                                                               

A) Nisbiy molekulyar massa    B) Nisbiy atom massa                  C)Molyar massa     D) Absolut massa 

13. Yer yuzasining foydali qazilmalar olinadigan qismining 90 foizini tashkil etadigan elementlarning necha foizini 

metallar tashkil etadi?                                                                                                                                                                                       

A) 60                                         B) 40                                                     C) 20                          D) 80 

14. O’z tajribalariga asoslanib atomistik nazariya asoslarini bayon etgan olim kim?                                                                         

A)Ar Roziy       B) Lavuazye        C)Demokrit        D) Dalton 

15. 

Metallarning yaltiroqligi, plastikligi, elektr o`tkazishi nima bilan bog`liq?                                                             

A)Kristall panjaradagi protonlarga                          B)Kristall panjaradagi erkin elektronlarga                                                                       

C) Kristall panjaradagi metalga                                D) Kristall panjaradagi nuklonlarga 

16. Qaysi olim yuqori darajada toza molibden olishning termik usulini yaratgan?                                                                  

A) N.R Yusupbekov                  B)  T.M Mirkomilov             C) N.A Parpiyev                 D) H.U. Usmonov