CLASS X SCIENCE CHEMICAL REACTIONS AND EQUATIONS (solved questions) 1 – Mark questions answer 1. What happens when magnesium ribbon burns in air? Ans. When magnesium ribbon burns in air, it combines with the oxygen to form magnesium oxide. 2Mg(s) + O2(g) -----> 2MgO(s) 2. Name the gas evolved when zinc reacts with dil. HCl. Ans. Hydrogen gas is evolved. 3. What is a chemical equation? Ans. A chemical equation is a symbolic notation that uses formulae instead of words to represent a chemical equation. 4. On what chemical law, balancing of chemical equation is based? Ans. Balancing of a chemical equation is based on the law of conservation of mass. 5. Represent decomposition of ferrous sulphate with the help of balanced chemical equation. Ans. 2FeSO4(s) -----> Fe2O3(s) + SO2(g) + SO3(g) 6. When carbon dioxide is passed through lime water, it turns milky, why? For full Question and solution X chemical reactions equations_solved questions Download File Related posts and downloadable file X Chemical reactions and equations key consents Download X Chemical Reaction and Equation [Solved Questions] Download X Questions for Formative assessments Download 10th Chemical and chemical Equations (13 pages visit blog Click ) X Chemical reactions and Chemical Equation:FA Evaluation Assignments Solved X Chem. React.and Eq. NCERT solution Download File Chemical reactions and equations Activity Based Question Read and Practice
19 Comments
Saurav
2/6/2012 09:08:16 am
Nice
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rishika
6/6/2012 12:43:03 am
its nice.....
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ayon
20/6/2013 11:39:14 am
ya right
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richa singh
13/6/2012 10:08:32 am
nice
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riya
23/6/2012 04:03:32 am
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priya
8/7/2012 03:58:54 pm
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pooja
9/7/2012 12:15:38 pm
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Shipra
7/8/2012 10:40:01 am
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12/8/2012 11:58:18 pm
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stranger
27/9/2012 09:25:12 am
these are just prilimnary questions:(
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ash
9/4/2013 12:32:34 pm
fine
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unknown
30/4/2013 09:01:44 am
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ayon
20/6/2013 11:37:57 am
good one
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diksha
30/6/2013 05:47:36 am
it is really good
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