What is the carbon content of the lignite coal?

20%-360%0%

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30%-40%

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40%-60%

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60%-80%

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Solution

The correct option is C 40%-60%
Lignite is a lower grade coal and contains about 40% to 60% carbon. It has low heating power and emits smoke. Its colour varies from dark to black brown.

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Similar questions

Q. The marks obtained by 40 students of a class are given below :

80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,

50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

, and

60

Construct a frequency distribution table.

Q. The marks obtained by 40 students of a class are given below :

80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80,

90, 50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

, and

60

How many students obtained marks below

40

Q. Lignite has a carbon content of around 80%.

The marks obtained by $40$ students of a class are given below :
$80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70,$
$10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,$ $50, 80,$
$60, 70, 40, 50, 60, 90, 60, 40, 40, 60$ , and $60$

How many numbers are less than

35

Q. Draw a histogram and frequency polygon to represent the following data.

Marks	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$	$70 - 80$	$80 - 90$	$90 - 100$
No. of Students	$12$	$22$	$35$	$40$	$60$	$52$	$40$	$30$	$5$

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What is the carbon content of the lignite coal?

The correct option is C 40%-60%Lignite is a lower grade coal and contains about 40% to 60% carbon. It has low heating power and emits smoke. Its colour varies from dark to black brown.

The correct option is C 40%-60%
Lignite is a lower grade coal and contains about 40% to 60% carbon. It has low heating power and emits smoke. Its colour varies from dark to black brown.