C:-n(n+1)

D:-n-1

Correct Answer:-Question Cancelled
Question76:-Among the following, the fullerene also known as "bucky ball" is
`^ (70)

Correct Answer:- Option-B
Question77:-Which among the following is a quantum dot?
A:CdSe*
TH O_(2)°
:-91 0_(2)
0:-/ ०० (2)
Correct Answer:- Option-A
Question78:-The temperature of cosmic background radiation is
A:-6K
B:-9.7K
C:-7.3K
D:-2.7K
Correct Answer:- Option-D
Question79:-Name the person who won Nobel prize in physics in 2011 for predicting the accelerating expansion of universe?
A:-R Feynmann
-Eric Drexler
C:-Paul Steinhardt
D:-S Perlmutter
Correct Answer:- Option-D
Question80:-The interaction which changes the flavor of a quark is?
A:-Strong interaction
Electromagnetic interaction
C:-Weak interaction
D:-Gravitational interaction
Correct Answer:- Option-C
Question81:-The SE of the sample mean
A:-decreases in direct proportion to the sample
-decreases in inverse proportion to the sample
:-increases in direct proportion to the sample
D:-does not depend on sample size
Correct Answer:- Option-B

Question82:-In an experimental research, a particular group is subjected to an innovative intervention and studied by way of
its effects. Which of the following design will you consider suit the study?

A:-After-only experimental design
B:-Pre-post experimental design
C:-Ex-post facto design
D:-Panel study design
Correct Answer:- Option-B

Question83:-Operational definition of a variable means defining it in a way that
A:-identifies specific behaviour in which it is reflected
B:-makes it possible to understand the variable
C:-makes research methodology clearer to the reader
D:-differentiates it from the other similar variables
Correct Answer:- Option-C

Question84:-Systematic sampling is a type of
A:-purposive sampling
B:-quota sampling
C:-non probability sampling
D:-random sampling
Correct Answer:- Option-D