Match the following physical quantities with units.

Physical quantity Unit
A. Molarity (i).  mol kg–1 
B.  Molality (ii). mol L–1
C.  Pressure (iii).  Candella
D. Luminous intensity (iv). Pascal

Codes:

A B C D
1. (i) (iv) (ii) (iii)
2. (ii) (i) (iv) (iii)
3. (i) (iv) (iii) (ii)
4. (iv) (i) (iii) (ii)
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The prefix peta used in the SI system is:  
1. \(10^{15}\) 2. \(10^{-15} \)
3. \(10^{18}\) 4. \(10^{-18} \)
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The correct match is:
List I List II
a. Micro i.  10-15 m
b. Mega ii.  10-6 m
c. Giga iii.  106 m
d. Femto iv.  109 m
Codes:
a b c d
1. i iv iii ii
2. iii iv ii i
3. ii iii iv i
4. i iii iv ii
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The number of moles of water present in a spherical water droplet of radius 1.0 cm are:

[Given: Density of water in the droplet = 1.0 g cm–3]

1. \( \dfrac{\pi}{18} \)
2. \( \dfrac{2\pi}{27} \)
3. \(24\pi\)
4. \( \dfrac{2\pi}{9} \)
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A reading on Fahrenheit scale is 200°F. The same reading on celsius scale will be :
1. 40°C
2. 94°C
3. 93°C
4. 30°C

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Consider the two statements:
Statement I: Scientific notation for 0.00016 is \(1.6 \times 10^{-3} \).
Statement II: The volume of water to be added to change the molarity of 200 mL
0.5 M aqueous solution to 0.1 M is 800 mL.
 
1. Statement I is correct, Statement II is correct.
2. Statement I is incorrect, Statement II is correct.
3. Statement I is correct, Statement II is incorrect.
4. Statement I is incorrect, Statement II is incorrect.
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The numbers 234,000 and 6.0012 can be represented in scientific notation as:

1. 2.34×10-9and6×103

2. 0.234 ×10-6 and 60012×10-9

3. 2.34×10-9and 6.0012×10-9

4. 2.34×105 and 6.0012×100

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The number of significant figures in 50000.020 × 10–3 is:

1. 11 2. 5
3. 8 4. 4
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Number of significant figures in 6.62 × 10–34 :

1. Two
2. Three
3. Four
4. One
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The number of significant figures in the numbers 5005, 500.0, and 126,000 are, respectively: 
1. 2, 4, and 3 
2. 4, 1, and 3 
3. 4, 4, and 6 
4. 4, 4, and 3 
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