Some Basic Concepts of Chemistry Test

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Some Basic Concepts of Chemistry Test - 10

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Weekly Quiz Competition

Question 1
1 / -0

15 km is = ---------------- m. ?

A
150 m

B
15000 m

C
1500 m

D
0.015 m

Solution

Since ,

1km

= 1000 m

∴ 15 km

= ( 15 x 1000 ) m

=15000 m
Question 2
1 / -0

30.4 cm = ---------- mm.:

A
0.304 mm

B
3.04 mm

C
.0.030 mm

D
304 mm.

Solution

Since,

1cm

=10 mm

∴ 30.4 cm

= (30.4 x 10) mm.

= 304 mm.
Question 3
1 / -0

There are ___ L in 12.0 ml?

A
0.0012 L

B
0.10 L

C
0.012 L

D
0.12 L

Solution

Since , 1L

=1000 ml

∴ 12 ml

= 12/1000 L

= 0.012 L
Question 4
1 / -0

The gram molar mass of ZnSO₄ is,

A
136.44g

B
106. 44 g

C
161.44 g

D
156.40 g

Solution

molar mass of ZnSO₄

= Σ ( Atomic masses of Zn , S , 4 x O atoms )

= [ ( 65.30 ) + ( 32.065 ) + ( 15.994 * 4 ) ].

= 161.4426 g / mol

~ = 161.44 g / mol
Question 5
1 / -0

The gm molar mass of H₂SO₄ is

A
98 g

B
78 g

C
68 g

D
48 g

Solution

Gram molar mas of s H₂S O₄

= [( 2 x atomic mass of H ) + ( atomic mass of S ) + ( 4 x atomic mass of O ) ] g

= [ 2(1)+32+4(16) ] g

= 98 g.
Question 6
1 / -0

A person is suffering with fever with a high temperature of 104 °F. What will be his body temperature in °C?

A
18.68 °C

B
32.38 °C

C
28 .10 °C

D
40 °C

Solution

104°F − 32) × 5/9 = 40°C
Question 7
1 / -0

In centigrade scale, -40 °F becomes

A
24 °C

B
-25 °C

C
-20 °C

D
-40 °C

Solution

Calculations :-

Since , °F

= [ (°C x 9/5 ) + 32 ]

Substituting the given value of temperature in ^o F ,we get

-40^o F

= ( ^o C x  1.8 )

∴ ^oC

= - (72 / 1.8 )

=  -40^o C
Question 8
1 / -0

-122 °C in Fahrenheit scale is

A
187.6 °F

B
237.6 °F

C
-187.6 °F

D
-237.6 °F

Solution

Calculations :

°F

=[ (°C x 9/5 ) + 32 ]

Substituting the given temperature in ^o C we get,

∴^oF

= [ ( -122 x 1.8 ) + 32 ]

= ( -219.6 + 32 )

= - 187.6
Question 9
1 / -0

27 °C is eqal to --------------K ?

A
289 K

B
300.15 K

C
246.15 K

D
none of these

Solution

Since , 0^o C

= 273.15 K

∴ 27^o C

= ( 273.15 + 27 ) K

= 300.15 K

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Re-Attempt Weekly Quiz Competition

Some Basic Concepts of Chemistry Test - 10

Result

Some Basic Concepts of Chemistry Test - 10

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SHARING IS CARING

Question 1

150 m

15000 m

1500 m

0.015 m

Solution

Question 2

0.304 mm

3.04 mm

.0.030 mm

304 mm.

Solution

Question 3

0.0012 L

0.10 L

0.012 L

0.12 L

Solution

Question 4

136.44g

106. 44 g

161.44 g

156.40 g

Solution

Question 5

98 g

78 g

68 g

48 g

Solution

Question 6

18.68 °C

32.38 °C

28 .10 °C

40 °C

Solution

Question 7

24 °C

-25 °C

-20 °C

-40 °C

Solution

Question 8

187.6 °F

237.6 °F

-187.6 °F

-237.6 °F

Solution

Question 9

289 K

300.15 K

246.15 K

none of these

Solution

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