Lead pencil contains

A Lead<br>
B Ferrous sulphide<br>
C Lead sulphide
D Graphite

Correct Answer: Graphite

Lead pencils contain graphite (a form of carbon), not lead. In fact, contrary to what many people believe, lead pencils never were made with lead. The ancient Romans used a writing device called a stylus.
Bissoy MCQ
#General Knowledge #Chemistry

Related Questions

Sumon buys a pen and a pencil for Tk. 55. If the pen costs Tk. 25 more than the pencil, how much does the pencil cost?
A 10
B 15
C 17.5
D 20
A person buys some pen and pencil. The pen costs TK. 7 each and pencils cost TK. 3 each. If he spends exactly TK. 81 and buys maximum number of pen possible under these conditions, what is the ratio to pencil ?
A 4:3
B 5:2
C 3:2
D None of these
If ERASER is called PENCIL and PENCIL is called SHARPENER and SHARPENER is called BAG, what will a child write with ?
A BOX
B PENCIL
C SHARPENER
D BAG
Pencil lead is primarily made of--
A graphite
B benzene
C granite
D chloride
The material used in the manufacture of lead pencil is
A Graphite
B Lead
C Carbon
D Mica
Percentage of lead in lead pencils is
A 0
B 31-66
C 40
D 80
The metallic sheath may be made of lead or lead alloy or of aluminum.
A Yes
B No
In a lead-acid cell, lead is called as
A positive active material
B negative active material
C passive material
D none of the above
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes
A Paralysis of muscles & loss of appetite
B Nervous depression
C Gastritis & diarrhea
D All of the above
Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower
A Price
B Corrosion resistance
C Thermal conductivity
D Abundant availability

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