ISC syllabus 2025 features a marking scheme and exam sample for all the topics. Pupils must get effectively acquainted While using the ISC syllabus class twelve to attain properly in the ultimate board assessment.
Response: Modem Periodic Regulation states that Bodily and chemical Qualities of the elements undoubtedly are a periodic functionality in their atomic figures.
Explanation: A switch controls the flow of latest in a circuit by making or breaking the connection. It doesn’t subject if it’s linked to the neutral or Reside wire; the key is finishing or interrupting the circuit. The Doing the job of change is not depending on the potential of Neutral wire.
As they have a tendency to come back nearer, two various forces work involving the nucleus and the electron of the opposite and vice versa. The nuclei in the atoms along with their electrons repel each other. Electrical power is necessary to beat the power of repulsion.
Reflex when an individual swallows — The tongue presses upward and again from the roof (palate) in the mouth which forces CBSE Class 12 Mathematics the bolus (the ball of chewed foods ) in the throat or the pharynx.
NCERT Answers for Class eleven Maths Chapter 14 Likelihood is nicely outlined with bit by bit answers to ensure that college students can certainly understand the principle. Right here you may get the concept of the notion of probability effectively.
Actinides. Group of 14 aspects while in the seventh time period soon after actinium. Both equally Lanthanoids and actinoids are put in independent panel at The underside in the periodic table.
(d)Removing of electron from orbitals bearing reduced n price is less complicated than from orbital possessing greater n price.
Remedy: The weather in a gaggle have identical valence shell electronic configuration and therefore have related Bodily and chemical properties.
k . A sequence made up of a finite variety of conditions known as a finite sequence. A sequence is referred to as infinite if it is not a finite sequence.
Query ten. How do atomic radius vary in a period and in a bunch? How can you clarify the variation?
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Issue two. The main ionisation enthalpy of magnesium is larger than that of sodium. However, the second ionisation enthalpy of sodium is greatly higher than that of magnesium. Clarify.
sp3 hybridisation: A single s-and 3 p-orbitals get hybridised to variety 4 equal hybrid orbitals. These orbitals are directed to the four corners of a daily tetrahedron.