Some Basic Concepts Of Chemistry Test 10

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Some Basic Concepts Of Chemistry Test 10

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Weekly Quiz Competition

Question 1
1 / -0

Few quantities with their units are listed below. Mark the units which are not correctly matched.
(i) Density: kg m^-3
(ii) Velocity of light: m s^-1
(iii) Planck's constant: J^-1 s^-1
(iv) Acceleration: m s^-2
(v) Force: kg m

A
(ii) and (iv)

B
(i) and (iii)

C
(iii) and (v)

D
(iv) and (v)

Solution

Planck's constant = J s
Force = kg m s^-2
Question 2
1 / -0

Match the prefixes present in column I with their multiples in column II and mark the appropriate choice.

A
(A)→(i), (B)→(ii), (C)→(iii), (D)→(iv)

B
(A)→(ii), (B)→(i), (C)→(iv), (D)→(iii)

C
(A)→(iv), (B)→(iii), (C)→(i), (D)→(ii)

D
(A)→(iii), (B)→(iv), (C)→(ii), (D)→(i)

Solution

pico = 10^-12, femto = 10^-15, milli = 10^-3, giga = 10⁹
Question 3
1 / -0

Choose the correct statement about I, II and III.

A
I and II have definite volume but III does not have this property

B
I, II and III are interconvertible by changing the conditions of temperature and pressure.

C
In the particles of I, freedom of movement is large

D
Both A and B

Solution

Properties of three sates of matter:
(i) Solids and liquids have definite volume whereas gases don't possess definite volume.
(ii) Three states of matter solid, liquid and gas are interconvertible by changing the temperature and pressure conditions.
(iii) Solids are rigid and have definite shape thus don't possess a large degree of freedom.
Question 4
1 / -0

Mark the conversion factor which is not correct.

A
1 atm = 1.01325 × 10⁵ P a

B
1 metre = 39.37 inch

C
1 litre = 10⁻³ m³

D
1 inch = 3.33 cm

Solution

1 inch = 2.54 cm
Question 5
1 / -0

Consider the following figure,

The correct relationship between fahrenheit and celsius scale is:

A
°F = °C + 273.15

B
°F = 2/5 °C + 16

C
°F = 9/5 °C + 32

D
°F = 1/3 °C + 32

Solution

Relation between F^∘ and celcius scale:
^∘F = 9/5^∘C + 32