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GS Set-1
Chemistry
Physical Chemistry
10

Physical Chemistry MCQ with Answers

10) What is the mass of 1 molecule of dry ice?

7.3 x 10⁻²³ gm

6.02 x 10⁻²² gm

4.01 x 10⁻²³ gm

5.02 x 10⁻²³ gm

Answer is:

7.3 x 10⁻²³ gm

Physical Chemistry MCQ with Answers

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Related Physical Chemistry MCQ with Answers

11) 6 x 10²⁰ molecules of SO₂ are removed from 320 mg of SO₂. What are the remaining moles of SO₂?

4 x 10⁻³ moles

5 x 10⁻³ moles

2 x 10⁻³ moles

6 x 10⁻³ moles

Answer is:

4 x 10⁻³ moles

12) Calculate the weight of lime obtained by heating 200 kg of 90% pure limestone:

90 kg

100.8 kg

100 kg

105 kg

Answer is:

100.8 kg

13) Decomposition of potassium chlorate gives potassium chloride and oxygen. If 4.2 moles of oxygen is needed for an experiment, how many grams of KClO₃ must be decomposed?

243 gm

340 gm

240 gm

343 gm

Answer is:

343 gm

14) A gaseous alkane is exploded with oxygen. The volume of O₂ for complete combustion to CO₂ formed, is in the ratio 7 : 4. Deduce molecular formula of alkane.

CH₄

C₃H₈

C₂H₆

None of these

Answer is:

C₂H₆

Physical Chemistry MCQ with Answers

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