Match the following prefixes with their multiples: Prefixes Multiples (i) Micro 10 6 (ii) Deca 10 9 (iii) Mega 10 - 6 (iv) Giga 10 - 15 (v) Femto 10

We know that, Micro = 10 - 6 Deca= 10 Mega= 10 6 Giga= 10 9 Femto= 10 - 15 Thus, the correct match is mentioned below. (i) Micro (i) 10 - 6 (ii) Deca (ii) 10 (iii) Mega (iii) 10 6 (iv) Giga (iv) 10 9 (v) Femto (v) 10 - 15

E M B I B E

Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.1

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11th CBSE

IMPORTANT

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In three moles of ethane $(C_{2} H_{6})$ , calculate the following:
Number of moles of carbon atoms.
(Only mention the number, not the unit)

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Important Questions on Some Basic Concepts of Chemistry

MEDIUM

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.1

In three moles of ethane $(C_{2} H_{6})$ , calculate the following:

The number of moles of hydrogen atoms.

MEDIUM

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.1

In three moles of ethane $(C_{2} H_{6})$ , calculate the following:

The number of molecules of ethane.

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11th CBSE

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Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.11

What is the concentration of sugar

(C_{12} H_{22} O_{11})

in

mol L^{- 1}

if its

20 g

are dissolved in enough water to make a final volume up to

2 L

?
(

0.03 / 0.3

)

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Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.12

lf the density of methanol is

0 .793 kg L^{- 1}

, what is its volume needed for making

2.5 L

of its

0.25 M

solution?

(Provide correct answer upto two decimal places and no need to mention units).

MEDIUM

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.13

Pressure is determined as force per unit area of the surface. The

SI

unit of pressure, Pascal is as shown below:

1 Pa = 1 N m^{- 2}

If the mass of air at sea level is

1034 g {cm}^{- 2}

. Calculate the pressure in Pascal.

EASY

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.14

What is the

SI

unit of mass? How is it defined?

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IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.15

Match the following prefixes with their multiples:

Prefixes	Multiples
(i)	Micro	$10^{6}$
(ii)	Deca	$10^{9}$
(iii)	Mega	$10^{- 6}$
(iv)	Giga	$10^{- 15}$
(v)	Femto	$10$

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IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.16

What do you mean by significant figures?

Learn and Prepare for any exam you want !

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In three moles of ethane C2H6, calculate the following: Number of moles of carbon atoms. (Only mention the number, not the unit)

Important Questions on Some Basic Concepts of Chemistry

Learn and Prepare for any exam you want !

In three moles of ethane $(C_{2} H_{6})$ , calculate the following:
Number of moles of carbon atoms.
(Only mention the number, not the unit)