Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(C)>Q 17

MEDIUM

9th ICSE

IMPORTANT

Earn 100

Urea is a very important nitrogenous fertilizer. Its formula is ${CON}_{2} H_{4}$ . Calculate the mass percentage of carbon in urea.

Important Questions on The Language of Chemistry

EASY

9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 1

What is a symbol of an element? What information does it convey?

EASY

9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 2

Why is the symbol

S

for sulphur but

Na

for sodium and

Si

for silicon?

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IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 3

Write the full form of $IUPAC$ . Name the elements represented by the following symbols :

$Au, Pb, Sn, Hg$

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IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 4

If the symbol for cobalt

(Co)

is written as

CO

what would be wrong with it?

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IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 5

What do the following symbol stand for:

$H$

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IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 5

What do the following symbol stand for:

$H_{2}$

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9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 5

What do the following symbol stand for:

$2 H$

EASY

9th ICSE

IMPORTANT

Concise Chemistry Class 9>Chapter 1 - The Language of Chemistry>EXERCISE 1(A)>Q 5

What does the following symbol stand for?

$2 H_{2}$