While using iodine in the laboratory, a few drops of iodine
fell on Mishti’s socks and a few fell on her teacher’s saree.
The drops of iodine on the saree turned blue-black while the
colour on the socks did not change. What can be a possible
reason?
In question, state whether the statement are true (T) or false (F)
A rhombus can be constructed uniquely if both diagonals are given.
What do you think of Raman’s statement, “All starches are
carbohydrates but not all carbohydrates are starches.’’
Describe the design of an activity to test your answer.
In question, state whether the statement are true (T) or false (F)
A parallelogram can be constructed uniquely if both diagonals and
the angle between them is given
In question, state whether the statement are true (T) or false (F)
A quadrilateral can be constructed uniquely if three angles and any
two sides are given.
Sugar is an example of carbohydrates. Sugar is tested with
iodine solution but it does not change to blue-black colour.
What can be a possible reason?
In question, state whether the statement are true (T) or false (F).
If diagonals of a quadrilateral bisect each other, it must be a
parallelogram.
In question, state whether the statement are true (T) or false (F)
A quadrilateral can be drawn if three sides and two diagonals are given.
Gourav got a fracture in his leg. His doctor aligned the bones
and put on a plaster. The doctor also gave him calcium tablets.
On the second visit, the doctor gave him Vitamin D syrup
along with calcium tablets. Refer to Fig. 3.5 and answer the
following questions:
(i) Why did the doctor give calcium tablets to Gourav?
(ii) On the second visit, why did the doctor give Vitamin D
syrup along with calcium tablets?
(iii) What question arises in your mind about the choices
made by the doctor in giving the medicines?
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