Bissoy.com
Doctors Medicines MCQs Q&A

Pencil lead is primarily made of--

Pencil lead is primarily made of-- 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.

Related Questions

Ruhi is shown three pencils and she observes that pencil A is longer than pencil B and pencil B is longer than pencil C. When Ruhi infers that A is a longer pencil than C, which characteristic of Jean Piaget’s cognitive development is she demonstrating?
The marked price of pen and pencil are in the ratio of 5 ∶ 4 respectively. The ratio between the cost price of pen and pencil is 3 ∶ 2 respectively. If the mark price of the pen gives a profit of 25%, then after giving 20% discount on the pencil, find out what percentage of profit or loss is made on the pencil.
With the help of a pointer the teacher points three red pens and two blue pencils lying on the table. Pointing to one pencil he says, "This pencil is blue". He then points two pens and says, "These pen are red". He takes one pen in his hand and while putting one pencil in his pocket says, "I have one pen in my hand and I am now putting pencil in my pocket". The above illustration best describes which one of the following approach to teaching-
In the question below are given three statements followed by four conclusions I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: No paper is pen. Some pen are pencil. No pencil is eraser. Conclusions: I. All easer are paper is a possibility. II. All pencil are eraser. III. No pen is eraser. IV. All pencil are paper.
If “Book” is called “paper”, “Paper” is called “boat”, “boat” is called “pen”, “pen” is called “pencil lead” and “pencil lead” is called an “eraser” then which of the following contains graphite?
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?
The price of a color pencil is Rs. 38 and a pencil box is Rs. 64. If there is the sale of half-price in a shop. How much money is needed to purchase 3 color pencils and 5 pencil boxes?
A boy bought 6 Pen, 10 Pencil and 16 Notebook for Rs. 174. Had he bought 10 Pen, 14 Pencil, 12 Notebook, it would have cost him Rs. 242. By how much, a pen and a pencil together cost more than a Notebook.?
Ram bought some pens at 5 Rs. per pen and some pencil at 4 Rs. per pencil. If he spent a total of 150 Rs. , How many pencil could have he bought?
The cost of 4 pencil and 5 pen is Rs 47 and cost of 2 pencil and 7 pen is Rs. 55, then what is the cost of the one pencil?