Match the Column I with Column II. Column - I (Event) Column - II (Time interval (in s )) ( A ) Lifetime of an excited state of an atom ( p ) 10 17 ( B ) Average human life-span ( q ) 10 11 ( C ) Age of Egyptian pyramids ( r ) 10 9 ( D ) Age of the universe ( s ) 10 - 8

A – s , B – r , C – q , D – p

A – p , B – q , C – r , D – s

A – q , B – p , C – s , D – r

A – r , B – s , C – p , D – q

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Which scale would be considered a large-scale map?

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Important Questions on Equilibrium

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

A body accelerates from rest with a uniform acceleration

a

for a time

t .

The uncertainty in '

a

' is

8 %

and the uncertainty in '

t

' is

4 % .

The uncertainty in the speed is

HARD

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The

H^{+}

ion concentration of a solution is

2 \times 10^{- 8} mol L^{- 1}

. The pH value of the solution is

\log_{10} 2 = 0.3010

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Taking into account of the significant figures, what is the value of

9.99 m - 0.0099 m

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Time

(T)

, velocity

(C)

and angular momentum

(h)

are chosen as fundamental quantities instead of mass, length and time. In terms of these, the dimensions of mass would be:

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Chemistry>Physical Chemistry>Equilibrium>pH Scale

The area of a square is

5.29 c m^{2} .

The area of

7

such squares taking into account the significant figures is:

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Newton \times second

is the unit of:

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

watt

is,

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The ratio of one micron to one nanometer is

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Match the Column I with Column II.

	Column - I (Event)		Column - II (Time interval (in $s$ ))
$(A)$	Lifetime of an excited state of an atom	$(p)$	$10^{17}$
$(B)$	Average human life-span	$(q)$	$10^{11}$
$(C)$	Age of Egyptian pyramids	$(r)$	$10^{9}$
$(D)$	Age of the universe	$(s)$	$10^{- 8}$

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Which one of the following is a fundamental quantity?

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Name the quantities which have no dimension but variable.

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Which of the following represents a

volt

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The unit of potential energy is

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Unit of self inductance is

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>pH Scale

The distance between centres of moon and the earth is about

60

times the radius of the earth. What will be diameter of the earth (approximately in degrees) as seen from the moon?

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Does ratio of same quantity depends upon the system of unit used?

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Chemistry>Physical Chemistry>Equilibrium>pH Scale

Which of the following ratios express pressure?

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Name the fundamental quantities in mechanics?

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Ampere - hour

is a unit of which of the following quantities.

EASY

Chemistry>Physical Chemistry>Equilibrium>pH Scale

Erg m^{- 1}

can be the unit for measuring:

Which scale would be considered a large-scale map?

Important Questions on Equilibrium

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