Class 12-science

You can get HSC 12th Science stream sample paper for information technology from various online free study webites which provides free study materials for preparation and you can also refer to youtube videos where you will get better explanation of answers of PYQs

So, haven't you watched the movie 12th fail. Just prepare once again next year and pass it then choose in which field you want to do your higher studies. As you are in 12th you must have Maths or Biology. Choose accordingly also.

Best of luck for the future.

You can find Class 12th Science previous year question papers from several reliable sources. The CBSE's official website is a primary source. Additionally, educational platforms like BYJU'S, Aakash Institute, Educart, and PhysicsWallah offer free PDF downloads of these papers, often accompanied by solutions, which are crucial for understanding exam patterns and improving preparation.

Students have a wide variety of courses to select after their NIOS Class 12 Science. For those who completed Class 12 with PCB option, they can join for courses like, BSc, MBBS, BHMS, BDS, BAMS, nursing, B.pharm, Pharm D, BA and other related courses. Students with PCM option can go for BSc, BA, Bcom, Engineering, LLB, and other courses. Check this page for courses after 12th Science.

With the combination of two different halogens, the interhalogen compounds are formed. When compared with pure diatomic halogen molecules, they are more reactive because the bond between different halogens are more polar and weaker. During reactions, it makes them more susceptible to bond cleavage.

Due to their high electronegativity, small atomic size, greater ability to form multiple bonds, and absence of d-orbitals, the first elements of each group behave differently.

The image is real when it is formed by the actual convergence of rays and it can be projected on a screen. For example, when the object is placed beyond focus, and the image is formed either by the convex lens or concave mirror.
The image is virtual, if it is formed by the apparent divergence of rays and it cannot be captured on a screen. For example, when the image is formed by the convex mirror or plane mirror.

Simple microscope: When the object is placed within the focal length, the simple microscope works on the principle of producing an erect, virtual and magnified image. To magnify small objects, the simple microscope uses a single convex lens.
Compound microscope: It uses two lenses including an eyepiece and objective. The objective lens creates a real, magnified, and inverted image which acts as the object for the eyepiece, which in turn magnifies it further.

In Ray Optics And Optical Instruments questions, when using lens and mirror formulas, sign convention helps in maintaining consistency. The sign convention determines whether quantities like image distance, object distance, and focal length are taken as positive or negative. The incorrect usage of these sign conventions mostly leads to wrong magnifications and image positions. For accurate results, it is essential to follow the Cartesian sign.