Which of the following is the odd one with regard to mass?

1. 1 g atom of sulphur 

2. 0.5 moles of CO2 

3. 1 mole of O2 

4. 3 × 10 23 molecules of SO2

Subtopic:  Moles, Atoms & Electrons |
 57%
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The weight of one molecule of a compound C60H122 is

1. 5.005×1023 g

2. 6.023×1023 g

3. 4.1×10-21 g

4. 1.4×10-21g

 

Subtopic:  Moles, Atoms & Electrons |
 64%
From NCERT
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Breakfast cereal is advertised to contain 110 mg of sodium/ 100 grams of cereal. The percent of sodium in the cereal is 

(1) 0.110%

(2) 0.0110 %

(3) 11.0%

(4) 0.22 %

 

Subtopic:  Concentration Based Problem |
 72%
From NCERT
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The percentage weight of Zn in white vitriol [ZnSO4.7H2O] is approximately equal to (Zn=65, S=32, O=16 and H=1)

1. 21.56%

2. 32.58%

3. 22.65%

4. 26.55%

Subtopic:  Moles, Atoms & Electrons |
 68%
From NCERT
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A gaseous mixture contains O2 and N2 in the ratio 1:4 by weight. Then the ratio of their number of molecules in the mixture is

1. 3:32

2. 7:32

3. 1:4

4. 3:16

Subtopic:  Moles, Atoms & Electrons |
 77%
From NCERT
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1cc N2O at STP contains: 

1. \({1.32 \over 224} \times10^{23}~\mathrm{electrons}\) 2. \({6.02 \over 22400} \times10^{23}~\mathrm{molecules}\)
3. \({1.8 \over 224} \times10^{22}~\mathrm{atoms}\) 4. All of the above
Subtopic:  Moles, Atoms & Electrons |
 69%
From NCERT
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A 5 molar solution of H2SO4 is diluted from 1 litre to a volume of 10 litres, the normality of the solution will be -

1. 0.5 N

2. 1.0 N

3. 2.5 N

4. 5 N

Subtopic:  Concentration Based Problem |
 71%
From NCERT
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If 0.50 mole of BaCl2 is mixed with 0.20 mole of Na3PO4, the maximum number of moles of Ba3(PO4)2 that can be formed is -

1. 0.10

2. 0.20

3. 0.30

4. 0.40

Subtopic:  Limiting Reagent |
 73%
From NCERT
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lf equal moles of water and urea are taken in a vessel,The mass percentage of urea in the solution will be -

1. 22.086

2. 11.536

3. 46.146

4. 76.92

Subtopic:  Concentration Based Problem |
 70%
From NCERT
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Sodium bicarbonate on heating decomposes to form sodium carbonate, CO2 and water. If 0.2 moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed?

1. 0.1

2. 0.2

3. 0.05

4. 0.025

Subtopic:  Moles, Atoms & Electrons |
 64%
From NCERT
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