Assertion (A): Boron has a smaller first ionization enthalpy than beryllium. Reason (R): The penetration of a 2s electron to the nucleus is more than the 2p electron, hence, 2p electron is more shielded by the inner core of electrons that the 2s electrons. (a) Assertion and reason both are correct statements but reason is not correct explanation of assertion. (b) Assertion is correct statement but reason is wrong statement. (c) Assertion and reason both are correct statements and reason is correct explanation of assertion. (d) Assertion and reason both are wrong statement.

Asked by Last Modified  

Follow 2
Answer

Please enter your answer

14 Year Experienced in Teaching Maths, Physics and Chemistry.

b) assertion is correct but the reason is wrong statement. boron is ready to lose its p orbit electron to achieve fully filled s orbits and empty p orbits. thats why it is having less ionization enthalpy than berlliyum
Comments

Ans will be (c) reason-in electonic configuration of boron electon we have one electron in 2p orbital which i much more shielded than 2s and removing electron from 2p is easier than 2s.hence IE for Boron will be less.
Comments

Related Questions

Which of the following angle corresponds to sp2 hybridisation? (a) 90° (b) 120° (c) 180° (d) 109°
Since sp2 is planar, and it has 3 bonds, so bond angle will be 360°/3= 120° Hence answer is option B
Profile Photo
Vivek
Is coaching necessary for the CBSE class 12?
Actually for disciplined study you need proper guidance to carry forward your syllabus easily without any hurdles that may be when someone is sharing his or her knowledge with proper guidance and all...
Profile Photo
Sriomprakash
0 0
View Comments5
Will coaching for the IIT-JEE in Class 11 affect the Class 12 boards?
Preparing for IIT JEE in class 11 will enhance your understanding of the subjects and knowledge once gathered will never get wasted . So you can go for it . Just have to study according to board exam as well . Good luck
Profile Photo
Sai
0 0
View Comments5
CO is isoelectronic with (a) NO+ (b) N2 (c) SnCl2 (d) N02
CO is isoelectronic with NO+ and N2. So, options (a) and (b) are the right answers. CO has 14 electrons, 8 from oxygen and 6 from carbon. NO has 15 electrons 8 from oxygen and 7 from nitogen. But, as it...
Profile Photo
Abirami
0 0
View Comments7

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Learn how to learn Chemistry
I suppose many of you have been through the latest web series KOTA FACTORY were some struggles that students face with Chemistry have been very aptly portrayed. The honest approach of the students regarding...
R


convert (i) nitromethane into dimethylamine? (ii) propanoic acid into ethanoic acid?
QUESTION convert (i) nitromethane into dimethylamine? (ii) propanoic acid into ethanoic acid? ANSWER Nitromethane into dimethylamine
Profile Photo

Inert Pair Effect in Group 13
Inert Pair Effect in Group 13In the modern periodic table, the elements of the boron family present in group 13 are:Boron (B), Aluminium (Al), Gallium (Ga), Indium (In) and Thallium (Tl)Their general electronic...
Profile Photo

Recommended Articles

Quality education does not only help children to get a successful career and life, but it also hugely contributes to society. The formal education of every child starts from school. Although there are numerous schools, parents find it challenging to choose the right one that would fit their child. It is difficult for them...

Read full article >

Learning for every child starts from a very young age. While the formal methods include school curriculums and private lessons, the informal methods include dancing, music, drawing, and various fun-filling activities. Playing games and practising these types of activities helps the children get out of boredom and...

Read full article >

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

Appearing for exams could be stressful for students. Even though they might have prepared well, they could suffer from anxiety, tension etc. These are not good for their health and mind. However, following a few exam preparation tips can save them from all these and help them to score good marks. Let’s find out all...

Read full article >

Looking for Class 11 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you