Four 100 ml beakers are taken and labeled them as A, B, C and D. About
50 ml of water is added in each beaker . Substances dissolved in each
beaker is given below. Read the given data and answer the questions
given.
Beaker A: Copper sulphate (CuSO4) + Zinc granule (Zn)
Beaker B:Copper sulphate (CuSO4) + Iron nail (Fe)
Beaker C: Zinc sulphate (ZnSO4) +Copper turnings (Cu)
Beaker D: Iron sulphate (FeSO4) + Copper turnings (Cu)
a) Do you find any change in the colour of the solution in beaker A? Give
reason for your answer and write the reaction taking place in Beaker A.
b) Why don't you find any colour change in beaker C and D?
Answers
Answer:
The National Talent Search Examination is one of the most prestigious scholarship examinations in India. The aim of the examination is to identify talented students across the country and award them with a scholarship program so that they can pursue their further studies. The examination is conducted by National Council of Educational Research and Training (NCERT).
The students are identified through a two-tier examination process i.e. Stage I and Stage II. Only students clearing the stage 1 exam are allowed to sit for the stage 2 examination. So, students must prepare hard for the exam and should be totally familiar with the NTSE Syllabus to score good marks in the exam.
Stage I: It is conducted by different states and union territories in India. It is a state level examination.
Stage II: It is conducted by the National Council of Educational Research and Training (NCERT). It is a national level examination.