Question

Correct the following :-

a) A substance may either be homogeneous or heterogeneous.

b) Antoine Lavoisier used the term “ element “ for the first time in 1661.

c) The rust is a hydrated oxide of copper.

d) Liquid Petroleum Gas , used in cooking , is stored in cylinders.

e) (NH4)

+

ion is tetravalent.

f) Sodium chloride solution reacts with Lead nitrate solution to form a precipitate of AgCl.​

Answer 1

Answer:

heterogeneous.

b) Antoine Lavoisier used the term “ element “ for the first time in 1661.

c) The rust is a hydrated oxide of copper.

d) Liquid Petroleum Gas , used in cooking , is stored in cylinders.

e) (NH4)

+

ion is tetravalent.

f) Sodium chloride solution reacts with Lead nitrate solution to form a precipitate

Answer 2

Answer ♡

Given

Perimeter of Rectangle is 60m

length is 4m more than four times it's breadth

To findi

length and breadth of the Rectangle

Slove

Let us assume the breadth of Rectangle be 'x'

according to the question

length would be => 4m+4x

Perimeter is 60m

Perimeter of Rectangle=2(length+Breadth)

=>60= 2( 4+4x +x)

=>60=2(4+5x)

=>2(4+5x)=60

=>4+5x=30

=>5x= 30-4

=>5x= 26

=>x= 26÷ 5

=>x=5.2

Now , breadth is 5.2m

length = 4+4x=4+4×5.2

length= 4+20.8=24.8m

Check

Perimeter of Rectangle=2( 24.8+5.2)

Perimeter of Rectangle=2(30)

Perimeter of Rectangle= 60m

Extra information=>

Perimeter is the total distance occupy by a solid 2D figure around its edge.

Area of Rectangle= length × breadth

✌✌✌✌✌✌✌✌✌✌

hope that u r helpful

please follow thank and brinlylist please