Why is the precipitate rinsed with a solution of 5% v/v NH₃?

Which of the following is not a type of Spectroscopy?
a) Gamma ray
b) X ray
c) Nuclear magnetic resonance
d) Sound

Teaching is defined as
An informative process
An informal process
An initiative process
An interactive process

Basic teaching model was developed by
Robert Glaser
Robert Gagne
E. Thorndike
B.F. Skinner

The number of components in the basic teaching model is
Three
Four
Five
Six

The ‘3M’ concept in instructional procedures refers to
Methods, Message and Materials
Methods, Materials and Media
Methods, Media and Message
Methods, Materials and Marking

The most important activity of the teacher is
Questioning activity
Explaining activity
Demonstration activity
Assignment activity

Teaching is
Classroom centered
Teacher centered
Student centered
Lab centered

Pedagogy is
A child-focused teaching approach
An adult-focused teaching approach
A trainer-focused teaching approach
An instructor-focused teaching approach

3M (MMM) does not include
Methods
Materials
Media
Message

The person associated with theory of Behaviorism is
John B. Watson
John Piaget
George Siemens
Stephen Downes