Solution:
The ideal teacher is a friend, philosopher and guide.

Solution:
A research paper is a brief report of research work based on both primary and secondary data.

Solution:
Studying the social status of a population, a researcher concluded that Mr. S is socially backward. His conclusion is inacurrate.

Solution:
Failure of students in examination, it may be the fault of teacher or students themselves.

Solution:
Verbal guidance is least effective in teaching skills.

Solution:
Research ethics do not include subjectivity.

Solution:
The modification of behaviour is most adequate.