The number of `1^(@), 2^(@)`, and `3^(@) H` atoms in 3-ethy1-5-methy1 heptane, respectively , is:

The number of 1^(@), 2^(@) , and 3^(@) H atoms in 2,5,6-trimethy1 octane, respectively,is

The number of 1^(@), 2^(@) , and 3^(@) H atoms in 2,5,6-trimethy1 octane, respectively,is

The number of 1^@, 2^@ and 3^@ carbon atoms present in isopentane are respectively:

In the structure of 4 -Isoropyl- 2,4,5 -trimethylheptane, number of 1^(@),2^(@) & 3^(@) H's are respectively.

In the structure of 4 -Isoropyl- 2,4,5 -trimethylheptane, number of 1^(@),2^(@) & 3^(@) H's are respectively.

Methy 1 orange gives red colour in

What is the decreasing order of basicity of 1^(@)2^(@) and 3^(@) ethy1 amines and ammonia ?