NCERT 2022 | पुष्पी पादप में लैंगिक जनन - L3 | Class 12 जीव विज्ञान | Hindi Medium | Aniket Sir |6PM

पुष्पी पादप में लैंगिक जनन|पुष्प संरचना|पुंकेसर :लघुबीजाणुपर्ण|लघुबीजाणुधानी|OMR

पुष्पी पादप में लैंगिक जनन|पुष्प संरचना|पुंकेसर :लघुबीजाणुपर्ण|लघुबीजाणुधानी|OMR

पुष्पी पादप में लैंगिक जनन-पुष्प संरचना |पराग़कण के नुक़सान और फ़ायदे |स्त्रीकेसर |परागण और उसके प्रकार ,प्रकार के लाभ हानि सहित |कृत्रिम संकरीकरण |पराग़ -स्त्रीकेसर संकर्षण |भ्रूणपोष |बीज और (फल के प्रकार)

Arrange the following activities in a logical and meaningful order. निम्नलिखित गतिविधियों को एक तर्कपूर्ण और अर्थपूर्ण क्रम में व्यवस्थित करें | 1. Attending classes in college /कॉलेज में कक्षाओं में शामिल होना 2. Admission merit list declaration /नामांकन की मेरिट सूची की घोषणा 3. Getting admission in the college /कॉलेज में नामांकन लेना 4. Applying for admission to college /कॉलेज में नामांकन के लिए आवेदन देना 5. Annual Examination – Class 12 /वार्षिक परीक्षा - कक्षा 12 6. Result declaration – Class 12 /परिणाम की घोषणा - कक्षा 12

Two rigid adiabatic vessel A and B which initially ,contain two gases at different temperature are connected by pipe line with value of negligible volume .The vessel A contain 2 moles Ne gas (C_(p.m)=(5)/(2)R) at 300 K, vessel B contain 3 moles of SO_(2) gas (C_(p.m)=4 R) at 400 K . The volume of the A and B vessel is 4 and 6 litre repectively . The final total pressue (in atm ) when valve is opened and 12 kcal heat supplied throught it to vessels . [Use : R =2 cal //"mole" K "and" R=0.08 L . atm//"mole" K as per desire ]

In iodometric titrations, an oxidizing agent such as KNnO_(4), K_(2)Cr_(2)O_(7),CuSO_(4),H_(2)O_(2) is allowed to react in neutral medium or in acidic medium with excess of potassium iodide to liberate free iodine Kl+ oxidizon agent to l_(2) Free iodine is titrated against stanard reducing agent usually with sodium thiosulphate i.e., K_(2)Cr_(2)O_(7)+6Kl+7H_(2)SO_(4)toCr_(2)(SO_(4))_(3)+4K_(2)SO_(4)+7H_(2)O+l_(2) 2CuSO_(4)+4Kl to Cu_(2)l_(2)+2K_(2)SO_(4)+l_(2) l_(2)+Na_(2)S_(2)O_(3)to 2Nal+Na_(2)S_(4)O_(6) In iodometric titrations, starch solution is used as an indicator. Starch solution gives blue or violet colour with free iodine. At the end point, blue or violet colour disappear when iodine is completely changed to iodide. A 1.1g sample of copper ore is dissovled and Cu^(2+) (aq.) is treated with Kl.l_(2) liberated required 12.12mL of 0.1M Na_(2)S_(2)O_(3) solution for titration. The % Cu in the ore in the ore is: