| ⇦ | 
| ⇨ |
1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel.Which reactant is left in excess and how much? (At.wt.Mg=24, O=16)
Options
(a) Mg,0.16g
(b) O₂,0.16g
(c) Mg,0.44g
(d) O₂,0.28g
Correct Answer:
Mg,0.16g
Explanation:
Initially Mg +1/2 O₂→MgO (or)
1/24 mole 0.56/32 mole
0.0416 mole 0.0175 mole
(0.0416-2 ×0.0175) (2 ×0.0175) mole
=0.0066 mole
mass of Mg=0.0066 ×24
=0.158 ≈ 0.16g
Related Questions: - Aluminium is extracted from alumina (Al₂O₃) by electrolysis of a molten mixture
- SO₂ reacts with Cl in sunlight to form
- The stability of +1 oxidation state among Al, Ga, In, and TI increases
- The process used for the extraction of sodium is called
- The temperature, at which heavy water has maximum density is
Topics: Some Basic concepts of Chemistry
(5)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Aluminium is extracted from alumina (Al₂O₃) by electrolysis of a molten mixture
- SO₂ reacts with Cl in sunlight to form
- The stability of +1 oxidation state among Al, Ga, In, and TI increases
- The process used for the extraction of sodium is called
- The temperature, at which heavy water has maximum density is
Topics: Some Basic concepts of Chemistry (5)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply