What are the different types of JC Chemistry tuition classes available at your centre?

We have 3 modes of learning for students to choose from: weekly physical classes at Bishan; weekly online lessons via Zoom; and on-demand video lessons.

Are you the only Chemistry tutor conducting the classes or do you engage other tutors to do that?

Please be rest assured that I conduct all my classes personally and I do not engage other tutors to teach at my centre.

How well do your students perform after attending your H2 Chemistry tuition classes?

Most of my students showed improvements by at least 3 grades and more than 80% have attained distinction for A Levels. The earlier the students join my classes, the more confident I am in improving their grades.

What is your class size at Bishan?

Usually the class size is around 10 to 12 students. Max class size is 16 pax.

Is there makeup lesson if I miss a class?

Yes makeup lesson is available in the same week subject to availability. If makeup class is not possible, the student can view the recorded video lessons at Google Classroom.

Do you have trial lesson available? How much is it?

Yes we do. Fees for trial lesson are for Bishan class and for Zoom online class.

Does your centre offer O Level chemistry tuition? Do you teach IB / IP chemistry tuition? How about H1 Chemistry?

Chemistry Guru specialises in H2 Chemistry for JC1 and JC2 or IP Year 5 and IP Year 6 students only. Find out all the information about A Level H2 Chemistry and the detailed comparison between H1 and H2 Chemistry. We do not conduct lessons for H1 Chemistry, O Level Chemistry, IB Chemistry or IP Chemistry at IP Year 3 and IP Year 4.

A Level Chemistry 2017 Paper 1 Question 21 Solution - Exclusive

In this exclusive video we want to discuss the suggested solution for A Levels Chemistry (H2 Chemistry) 2017 Paper 1 Question 21.

Let Chemistry Guru, Singapore's top JC Chemistry tuition centre, guide you through this question:

2017 H2 Chem P1 Q21 question

The topic tested in this question is on basicity of Nitrogen compounds in Organic Chemistry.

The basicity of nitrogen compounds is directly related to lone pair availability on nitrogen. The more available the lone pair, the stronger the base. For a more detailed comparison you can check out my video on Basicity of Nitrogen Compounds.

There are only 3 compounds in this question to consider so let's discuss their lone pair availability in detail.

1. Amine Basicity

Electron donating R groups will increase lone pair availability which makes amines better lone pair donors. This makes amines more basic than ammonia.

2017 H2 Chem P1 Q21 amine basicity

2. Phenylamine Basicity

Lone pair on nitrogen will be delocalised into the benzene ring which makes it less available for donation. This makes phenylamine less basic than ammonia which in turn makes it less basic than amines.

2017 H2 Chem P1 Q21 phenylamine basicity

3. Amide Basicity

Lone pair on nitrogen is delocalised extensively into the acyl carbon. The lone pair is not used for donation hence amides are neutral and the least basic amongst all nitrogen compounds.

2017 H2 Chem P1 Q21 amide basicity