Every one of the essential matters for the examination can be checked in the ISC 2025 syllabus. ICSE 12th syllabus 2025 is segregated into concept and useful papers. The weightage for every paper varies According to topic.
Reply: The Electrical power which can be launched by an atom in gaining an electron from outside atom or ion to sort detrimental ion (or anion) is termed electron attain enthalpy (∆egH).
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Rationalization: Resistance improves with rise in size and decreases with boost in cross-sectional location.
Draw a neat diagram from the "Microscopic Framework of an intestinal villus" and label the components presented under :
(b) Enzymes — An enzyme is usually a protein that acts on a particular compound to kind a selected conclude product or service. It finest acts at a specific temperature and pH.
Question 2. Discuss the main properties of four blocks of elements in the periodic desk? Give their basic Digital configuration.
Reply: The elements of Team I've just one electron within their respective valence shells and therefore have a robust tendency to shed this electron. The tendency to shed electrons subsequently, depends on the ionization enthalpy. Considering that the ionization enthalpy decreases down the group as a result, the reactivity of group one components raises in a similar buy Li < Na < K < Rb < Cs.
Answer: The elements in a gaggle have very same valence shell electronic configuration and for this reason have equivalent Actual physical and chemical properties.
The NCERT syllabus mainly focuses on this book to really make it pupil-helpful to really make it beneficial for the two the students and also the competitive Examination aspirants.
The five sp3 d hybrid orbitals are directed in direction of the five comers from the trigonal bipyramidal. That's why, the geometry of PCl5 is often represented as:
They may be very reactive aspects and so takes place in blended state. On moving down the team their reactivity will increase.
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Solution: Electron obtain enthalpy would be the Electricity produced when an isolated gaseous atom is transformed into a adverse ion by including an extra ICSE Class 11 electron.