Oxaloacetate, is an ion that is produced by the body during cellular respiration

Question

Oxaloacetate, is an ion that is produced by the body during cellular respiration. Its Lewis structure is shown below. Answer questions 18-20 based on this structure. What is the estimated bond angle corresponding to the arrow labeled Y? a) 90 degree b) 109.5 degree c)120 degree d) 180 degree e) 270 degree What is the hybridization of the What is the hybridization of the carbon marked with the asterisk(")? a) sp b) sp^2 c) sp^3 d) sp^3d) sp^3d e) sp^3d^2 How many pi bonds are shown in the above structure? a) 0 b) 1 c) 2 d) 3 e) 4 Nitrogen-13 decays by position emission so produce ___ a) Carbon-13 b) Oxygen-13 c) Boron-11 d) carbon-14 e) Boron-13

Explanation / Answer

18)

Central C on which H is attached is forming 4 sigma bonds

So, it is SP3 hybridised

So, angle = 109.5 degree

Answer: b

19)

* C is bonded with 3 sigma bonds

So, is is SP2 hybridised

pi bond is not considered in hybridisation

Answer: b

20)

There are 3 double bonds

So, there are 3 pi bonds

Answer: d

21)

In positron emission , atomic number decreases by 1 but mass number remains unchanged

atomic number of N is 7

So, atomic number of product is 6 which is for carbon

mass number will not change

So, product is C-13

Answer: a

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