Velocity v and acceleration a in two systems of units 1 and 2 are related as v 2 = n m 2 v 1 and a 2 = a 1 m n respectively. Here m and n are constants. The relations for distance and time in two systems respectively are

n 3 m 3 L 1 = L 2 and n 2 m T 1 = T 2

L 1 = n 4 m 2 L 2 and T 1 = n 2 m T 2

L 1 = n 2 m L 2 and T 1 = n 4 m 2 T 2

n 2 m L 1 = L 2 and n 4 m 2 T 1 = T 2

Match the physical quantities with their correct SI units. List-I List-II (A) Planck's constant (I) kg m s - 2 (B) Torque (II) kg - 1 m 3 (C) Weight (III) m 2 kg s - 1 (D) Specific volume (IV) kg m 2 s - 2 The correct match is

A = III , B = IV , C = I , D = II

A = II , B = IV , C = I , D = III

A = IV , B = I , C = II , D = III

A = II , B = III , C = I , D = IV

EASY

Earn 100

Given below are two statements :
Statement I : Astronomical unit (Au), Parsec (Pc) and Light year (ly) are units for measuring astronomical distances.
Statement II : Au < Parsec (Pc) < ly
In the light of the above statements, choose the most appropriate answer from the options given below:

36.17% studentsanswered this correctly

Important Questions on Some Basic Concepts of Chemistry

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

A huge circular arc of length $4.4 ly$ subtends an angle $4 s$ at the centre of the circle. How long it would take for a body to complete $4$ revolution if its speed is $8 AU$ per second?
Given : $1 ly = 9.46 \times 10^{15} m$

$1 AU = 1.5 \times 10^{11} m$

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

Pick out the stranger

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

If $E$ and $H$ represents the intensity of electric field and magnetizing field respectively, then the unit of $\frac{E}{H}$ will be:

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

Velocity

(v)

and acceleration

(a)

in two systems of units

1

and

2

are related as

v_{2} = \frac{n}{m^{2}} v_{1}

and

a_{2} = \frac{a_{1}}{m n}

respectively. Here

m

and

n

are constants. The relations for distance and time in two systems respectively are

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

Which of the following represents fundamental forces of nature?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

The distance of the Sun from earth is

1.5 \times 10^{11} m

and its angular diameter is

2000''

when observed from the earth. The diameter of the Sun will be

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

The prefix atto means

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

The angular diameter of a planet measured from earth is

90 " .

If the diameter of the planet is

π \times 10^{6} m,

then its distance from the earth is

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

Match the physical quantities with their correct $SI$ units.

	List-I		List-II
(A)	Planck's constant	(I)	$kg m s^{- 2}$
(B)	Torque	(II)	${kg}^{- 1} m^{3}$
(C)	Weight	(III)	$m^{2} kg s^{- 1}$
(D)	Specific volume	(IV)	$kg m^{2} s^{- 2}$

The correct match is

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

Let

G, W, S

and

E

be relative strengths of gravitational, weak nuclear, strong nuclear and electromagnetic forces. Identify the correct option

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

Match List I with List II

	List I		List II
A	Torque	I	$kg m^{- 1} s^{- 2}$
B	Energy density	II	$kg m s^{- 1}$
C	Pressure gradient	III	$kg m^{- 2} s^{- 2}$
D	Impulse	IV	$kg m^{2} s^{- 2}$

Choose the correct answer from the options given below :

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

Which of the following is not a unit of time?

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

0.27 g

of a long chain fatty acid was dissolved in

100 {c m}^{3}

of hexane.

10 m L

of this solution was added dropwise to the surface of water in a round watch glass. Hexane evaporates and a monolayer is formed. The distance from edge to centre of the watch glass is

10 c m

. What is the height of the monolayer?
[Density of fatty acid

= 0.9 g c m^{- 3}; π = 3]

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

One angstrom

(\overset{\circ}{A})

is equal to:

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

What is the density of water vapour at boiling point of water?

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

A hot air balloon with a payload rises in the air. Assume that the balloon is spherical in shape with diameter of

11.7 m

and the mass of the ballon and the payload (without the hot air inside) is

210 kg

Temperature and pressure of outside air are

27 ° C

and 1 atm

= 10^{5} N / m^{2}

, respectively. Molar mass of dry air is

30 g

. The temperature of the hot air inside is close to [The gas constant,

R = 831 {JK}^{- 1} {mol}^{- 1}

]

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

The units nanometer and picometer are related as,

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

The nearest star to our solar system is

4.3

light years away. The distance of this star in Parsec is (Mean distance between the earth and the sun

= 1.5 \times 10^{11} m

and one light year

= 9.46 \times 10^{15} m)

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

The dimension of light year

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Properties of Matter and their Measurement

A plano-convex lens of unknown material and unknown focal length is given. With the help of a spherometer we can measure the

Given below are two statements : Statement I : Astronomical unit (Au), Parsec (Pc) and Light year (ly) are units for measuring astronomical distances. Statement II : Au < Parsec (Pc) < ly In the light of the above statements, choose the most appropriate answer from the options given below:

Important Questions on Some Basic Concepts of Chemistry

Learn and Prepare for any exam you want !

Given below are two statements :
Statement I : Astronomical unit (Au), Parsec (Pc) and Light year (ly) are units for measuring astronomical distances.
Statement II : Au < Parsec (Pc) < ly
In the light of the above statements, choose the most appropriate answer from the options given below: