Answer : Option DExplaination / Solution:
For SN1 stability of carbocation which matters. In C6H5C(CH3)(C6H5)Br carbocation will be tertiary and will be resonance stablised.
Answer : Option DExplaination / Solution:
In communication systems, noise is an error or undesired random disturbance of a useful information signal. The noise is a summation of unwanted or disturbing energy from natural and sometimes man-made sources.Consequently,a distored or corrupted version of the transmitted signal reaches the receiver.
Answer : Option DExplaination / Solution:
Apomixis is modified form of reproduction in plants in which seeds are formed without fusion of gametes. The diploid cell of nucellus develops into an embryo giving a diploid seeds.
Answer : Option CExplaination / Solution:
The year 1921 is a year of the great divide in the demographic history of India when mortality started to decline leading to acceleration in the rate of population growth.
Q7.The minimum amount of energy required by the reacting molecules at the time of collisions in order to produce effective collisions is called
Answer : Option BExplaination / Solution:
The minimum amount of energy required by the reacting molecules at the time of collisions in order to produce effective collisions is called threshold energy.
Answer : Option AExplaination / Solution:
Frequently distribution can be framed from histogram. Frequently polygon and frequency curve can be prepared by converting the mid points of histogram.
Answer : Option EExplaination / Solution:
Cell division consists of karyokinesis and cytokinesis. During karyokinesis division of chromosomes takes place and during cytokinesis division of cytoplasm takes place. Ultimately the cell divides into two halves.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0