CBSE 12th

No ,you can't take admission based on class 10 th marksheet you need to show 12th marksheet. Normal colleges would give you admissions easily or they may take an entrance test. If you still want to have good percentage in 12 th you may give improvement.

CBSE past question papers for Class 12 History are available at the official site of CBSE which is cbse.gov.in. Under the tab "Examinations", one can either select Previous Year Question Papers or Question Paper for Term I/II. Papers for recent years including 2023-24 can be downloaded free of cost in PDF format by clicking on the relevant year and subject (History, code 027).

Alternatively, cbseacademic.nic.in has a standard establishment under Question Papers with marking schemes. The examination papers for the 2024-2025 period might be uploaded by the last week of March 2025, post exams, which would be around May-June 2025. 

To appear for the CBSE Class 12th improvement exam, you need to pass the main examination in the current year (2025), then apply online through the CBSE Open School, and appear for the exam in the subjects you wish to improve. 

Here's a more detailed breakdown:

1. Eligibility:

You must have passed the main CBSE Class 12th examination held in the current year (March 2025). 

You can choose to improve your performance in one or more subjects. 

Several physical properties shows attributes due the presence of halogen atoms, students can check few notable and important changes below;

• Boiling Point Increases with increasing molecular mass and van there Waals forces.
• Halogen-containing compounds are denser than hydrocarbons.
• Insoluble in water (due to non-polar nature) but soluble in organic solvents.

Haloalkenes are organic compound in which halogen atoms are bonded with carbon atom with C-X bond. There are several chemical reactions which are really important for the CBSE and other exam perspective. Students cna check below;

• Nucleophilic Substitution Reactions
• Elimination Reactions
• Reaction with Metals
• Wurtz Reaction 
• Grignard Reagent Formation

Student must know that haloarenes are important organic compounds, for everyday chemistry and also to fetch marks in their exams. Students must understand and memorise few very important reaction of haloarens which can come handy in the exam hall. here are a few reactions;

• Electrophilic Substitution Reactions
• Nucleophilic Substitution Reaction
• Wurtz-Fittig Reaction
• Fittig Reaction

Students can also check the NCERT solutions for the ch 6 haloalkenes and haloarenes provided by our experts at Shiksha for better understanding.

Haloalkanes and haloarenes are organic compounds containing halogen atoms (F, Cl, Br, I) attached to an alkyl or aryl group, respectively. Students must learn physical properties, chemical properties, bond types, and their reaction with different elements, metals and compounds. We have provided the NCERT Solutions for Class 12 Chemistry Haloalkanes and Haloarenes so that students can use the solutions to understand the fundamentals and get good score in the exams. Chemistry Class 12 Haloalkaes and haloarenes is asked for 6 marks in the board exams, student should study the chapter in detail.