Kimya Ödev Yardımı

QuetionAI‘nin kimya problemi çözücüsü, temel kimyasal reaksiyonları ve denklemleri kullanıcılar için gerçek zamanlı olarak özetleyebilen ve zayıf bir temele sahip öğrencilerin bile kimyada kolayca uzmanlaşabilmesi için güçlü bir öğrenme sistemine sahip olan bir ortaokul kimya ders aracıdır.

Artık periyodik tablonun temel özellikleri hakkında endişelenmenize gerek yok. Burada her elemente karşılık gelen kimyasal reaksiyonlara ve reaksiyon prensiplerine kolaylıkla ulaşabilirsiniz. Moleküllerin ve atomların orijinal yapısını, görülebilen makroskobik olaylardan çıkarmak, her zaman savunduğumuz bir kimya araştırma tekniğidir.

In the laboratory you dissolve 14.2g of barium iodide in a volumetric flask and add water to a total volume of 500 mL. What is the-molarity of the solution? square m What is the concentration of the barium cation? square M. What is the concentration of the iodide anion? square M.

Select the correct answer. Which missing item would complete this alpha decay reaction? (}_{100)^257Fmarrow +_(2)^4He A. (}_{98)^253Cf B. (}_{96)^255Cm C. (}_{98)^253Fm D. (}_{90)^232Th E. (}_{92)^288U

Select the correct answer. Which missing item would complete this beta decay reaction? (}_{53)^131Iarrow _(-3)^0 A. (}_{2)^4He B. (}_{53)^132I C. (}_{1)^0n D. (}_{52)^131Te E. (}_{54)^131Xe

22. Different polymorphs of the same drug may exhibit: a) Same solubility b) same melting point c) different solubility dysame crystalline form 23. Crystal growth occurs in pharmaceutical products due to: d) All of a) Absorption of water b) Loss of volatile component c) loss of water these 24. Coalescence is the instability condition of: d) Emulsions b) Suspensions c) Syrups d) Tablets 25. Hydrolysis is a reverse phenomenon of the: a) Degradation b) Photolysis d) Oxidation d) Condensation 26. Drugs which have amides in their structure are prone to: a) Oxidation b) Reduction of Hydrolysis d) All of these 27. When oxidation occurs the oxidation state of the chemical species become: a) Unstable b) More stable c) decreased d) Increased 28. Autoxidation, is caused by the: a) Absorption of free radicals b) Creation of free radicals c) destruction of free radicals d) loss of dree radicals 29. Which type of pharmaceutical degradation usually occurs adrenaline and riboflavin? a) Hydrolysis b) Auto oxidation d. Photo Oxidation d) Decarboxylation 30. 4-Aminosalicylic acid usually undergoes: a) Hydrolysis b) Auto oxidation c) Photo Oxidation d) Decarboxylation

6. Micelles solubilize molecules of poorly soluble nonpolar pharmaceuticals in/at: 3). Core of the micelle b)Shell of the micelle c) Continuous aqueous phase d) Surfactant 7. At and above CMC the surface tension of liquid: a) Increase b) Decrease c) Remain constant d) depend on nature of surfactant 8. Which of the following is/are the good conductor of electricity? A) Ionic surfactants b) Non-ionic surfactants c) Micelles d) Association colloids 9. The aggregation of molecules into micelles will lead to increased: a) Transmission of light b) Scattering of light c) Absorption of light d) All of these 10. Shelf-life is the time required for a drug product to degrade by: a) 20% b) 50% 10% d) 100% 11. The prerequisite for the acceptance and approval of any pharmaceutical product is: a) Solubility b) Stability c) Shelf-life d) All of these 12. Stability studies are required to be conducted in a planned way following the guidelines issued by: a) FDA b) ICH c) WHO d) B &C 13. The storage conditions in accelerated stability studies are: a) 50^circ Cpm 2 and 60pm 10RH b) 50^circ Cpm 2 and 80pm 5 RH 40^circ Cpm 2 and 75pm 5RH d) 60^circ Cpm 2 and 80pm 10RH