32. 1.8g of glucose (molar mass: 180g/mol) is dissolved in 0.5L of an aqueous solution at 300K. What will be its osmotic pressure?
Answers
FOREWORD
The National Curriculum Framework (NCF), 2005 recommends that children’s
life at school must be linked to their life outside the school. This principle marks
a departure from the legacy of bookish learning which continues to shape our
system and causes a gap between the school, home and community. The syllabi
and textbooks developed on the basis of NCF signify an attempt to implement
this basic idea. They also attempt to discourage rote learning and the maintenance
of sharp boundaries between different subject areas. We hope these measures
will take us significantly further in the direction of a child-centred system of
education outlined in the National Policy on Education (1986).
The success of this effort depends on the steps that school principals and
teachers will take to encourage children to reflect on their own learning and to
pursue imaginative activities and questions. We must recognise that, given space,
time and freedom, children generate new knowledge by engaging with the
information passed on to them by adults. Treating the prescribed textbook as
the sole basis of examination is one of the key reasons why other resources and
sites of learning are ignored. Inculcating creativity and initiative is possible if we
perceive and treat children as participants in learning, not as receivers of a fixed
body of knowledge.
These aims imply considerable change in school routines and mode of
functioning. Flexibility in the daily time-table is as necessary as rigour in
implementing the annual calender so that the required number of teaching days
are actually devoted to teaching. The methods used for teaching and evaluation
will also determine how effective this textbook proves for making children’s life at
school a happy experience, rather than a source of stress or boredom. Syllabus
designers have tried to address the problem of curricular burden by restructuring
and reorienting knowledge at different stages with greater consideration for child
psychology and the time available for teaching. The textbook attempts to enhance
this endeavour by giving higher priority and space to opportunities for
contemplation and wondering, discussion in small groups, and activities requiring
hands-on experience.
The National Council of Educational Research and Training (NCERT)
appreciates the hard work done by the textbook development committee
responsible for this book. We wish to thank the Chairperson of the advisory group
in science and mathematics, Professor J.V. Narlikar and the Chief Advisor for
this book, Professor B. L. Khandelwal for guiding the work of this committee