A greyish magnetic substance 'A' is added in a solution 'B' which is blue in colour. After some time a deposition of 'C' is observed on 'A' and colour of solution also changes to green. Identify A, B, C. Explain the process with the help of reaction.
Answers
Students should review their section and describe the subsystem and the parts that make a bicycle work.
The subsystems are: The Wheel. Drivers & Gears.Let we divide Rs.50760 in two parts
One is Rs.x and another is Rs.(50760-x)
The share bought with Rs.x were bought at 8% discount=100−1008×100=Rs.92
No of share bought with Rs.x=92x
As income =No. of share×dividend ×face value
Dividend =8%
Face value=100
∴ Income=92x×1008×100=928x (income 1)
The buying price of share bought with Rs.(50760-x) at 8% premium=100+1008=100108
No of share bought with Rs.(50760-x)=10850760−x
Dividend=9%
Face value=100
∴ Income=10850760−x×1009×100=1250760−x (income 2)
According to the question both incomes are equal
⇒928x=1250760−x
⇒24x=23(50760−x)
⇒47x=50760×23
⇒x=47
Answer:
E
very day you come across many
changes in your surroundings.
These changes may involve one
or more substances. For example, your
mother may ask you to dissolve sugar
in water to make a cold drink. Making a
sugar solution is a change. Similarly,
setting curd from milk is a change.
Sometimes milk becomes sour. Souring
of milk is a change. Stretched rubber
band also represents a change.
Make a list of ten changes you have
noticed around you.
In this chapter we shall perform some
activities and study the nature of these
changes. Broadly, these changes are of
two kinds, physical and chemical