D block elements are called as transition elements. F block elements are called as inner transition metals. F block elements were actually a part of group 3 only but due to some similarities in their properties they got a different space in f block table.

Kindly refer to the link below for knowing more about these elements.

https://school.careers360.com/ncert/ncert-solutions-class-12-chemistry-chapter-8-the-d-and-f-block-elements

Best wishes. Thank-you.

hello,

well, to be honest ,scoring 200+ marks in neet exam won't do much help to you, yo will have to face a lot of problems to get a good college .

studying from NCERT will surely clear up all your doubts, but it is strongly recommended for you to refer some of the other books as well and make sure that you try to achieve 550 + marks in the exam.

nothing is impossible, don;t worry, you can do it.

refer the link for the books-

https://medicine.careers360.com/articles/best-books-for-neet

hope that helps

Hello Aspirant,

Variation in ionisation enthalpies: Ionisation enthalpy increases with increases in atomic number along the period. Some elements show irregularities in this trend due to type of electron to be removed and the extra stability of the exactly half-filled and completely filled electronic configurations.

Variation along the period: In the second period Li to Be, the ionisation enthalpy increases due to increased nuclear charge and smaller atomic radius of Be as compared that of Li. For Be to B, although the nuclear charge of B is more than that of be, yet the ionisation enthalpy of B is lower than that of Be. For B to C to N, the first ionisation enthalpy of these elements keeps on increasing due to progressively increasing nuclear charge and decreasing atomic radius. For N to O, the first ionisation enthalpy of oxygen is lower than that of N although the nuclear charge of O is higher than that of nitrogen. For O to F to Ne, the first ionisation enthalpy increases from O to F to Ne because of the increasing nuclear charge.

Similar variations in the first ionisation enthalpies of the elements of the third period have been observed.

Variation of electron gain enthalpy in a group: In general, the electron gain enthalpies become less negative as we move down a group. But the electron gain enthalpies of some of the elements of second period that is O, and F are however, less negative than the corresponding elements that is s and Cl of the third period.

Thus the electron gain enthalpy of F is unexpectedly less negative than that of Cl.

Also the electron gain enthalpy of noble gases is positive as atoms of these elements have completely filled subshells.

Variation in atomic radii: The atomic radius abruptly increases as we move from halogen (F) to the inert gas (Ne). This is due to the reason that in case of inert gases all the orbitals are completely filled and hence the electronic repulsions are maximum.

Variation of valence in a period: As we move across a period from left to right, the number of valence electrons increases from left to right, the number of valence electrons increases from 1 to 8. But the valence of elements with respect to H or O first increases from 1 to 4 and then decreases to zero.

Electronegativity

This is the easiest of the exceptions. We have said that electronegativity increases to the right. This is true except that the trend does NOT include the noble gases. That means that fluorine has the highest electronegativity, not Ne or He. This is because the definition of electronegativity contains the phrases "in a covalent bond." Since the noble gases don't bond, they don't have electronegativities.

It should be noted that a few of the noble gases have been forced to bond (at high temperture and high pressure with fluorine). You may find tables that, therefore, list values for the electronegativity of Xe and Kr, but these are not terribly important values to know.

Hope this helps,

All the best and thank you!

Forget 3 words for a minuit:AAKASH,ALLEN and NCERT.

There are 3 checkpoints in the cell cycle. One between G1 and S phase,the other between G2 and M phase and the other between Metaphase and Anaphase.The G1/S checkpoint plays THE MAJOR role in G0 phase transition according to Wikipedia,Brittanica,Khan Academy (to name a few).So no matter what answer is given by NTA,I would consider G1 phase to be the logically correct answer.

PEACE

Dear Aspirant,

Although the difficulty level of UPSEE is on the easy side, depending solely on the NCERT is not a good option, I would suggest with NCERT you must use some previous year question paper books as they will give you a practical idea about what sort of questions will be asked and therefore you can prepare accordingly.

Hope this helps Thank you.

Hello ,

Hope you are doing well

Syllabus for Gujcet 2020 Biology

The topics of the Biology are:

• Photosynthesis
• Mineral Nutrition
• Circulation in Animals
• Excretion and Osmotic Regulation in Animals
• Respiration
• Growth, Regeneration, and Ageing
• Growth and Development in Plants
• Reproduction and Development in Animals
• Nervous System of Cockroach and Humans
• Animal Nutrition and Digestive System of Cockroach & Humans
• Human Endocrine System
• Organism and their Environment
• Modern Methods of Diagnosis
• Food Production
• Water Relation of Plants
• Population-Environment and Development
• Biological Resources and Biodiversity
• Natural Resources: Their Kinds and Sources
• Movement and Locomotion in Animal Immunity

Hope it helps you

Thankyou

All the best!!

Hello dear,

According to me if you are preparing for something and the concept of the preparation is cleared then you can solve anything related your preparation. As you are preparing for NEET and your concept are clear at coaching center, school or by self studying then you no need study more books for enhancement of knowledge because when you prefer more for a concept then you little bit confuse (More knowledge more confusion, Less knowledge less confusion and No knowledge no confusion). So, yes can practices as many as you wish on any app or any model paper of NEET paper if your concept are clear then your are able to solve all that problems.

So, from above paragraph I want to say that if your concept are clear in NEET then you may prefer any application .

Hi Aditya,

Yes, NCERT Exemplar of Class 11th and 12th Maths are useful for JEE Mains. But, NCERT Exemplar is enough to get good marks in board exams, for JEE Mains studying Exemplar is not at all sufficient. You are required to study several other reference books also. Studying NCERT Exemplar for JEE Mains can fetch you around 30% Marks in JEE Main Maths Examination.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!