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CBSE / Chemistry Questions

Total Questions 1082
gases do not have fixed volume-give reason
whats the IUPAC name of K2[HgI4] complex ?
why respiration considered an exothermic reaction? explain
why is respiration considered as exothermic reaction explain
how can we balance a equation
Which is the strongest metal of all metals ?
Liquids generally have lower density as compared to solids.But you must have observed that ice floats on water.Find out why.
what is metals and non-metals?
Complete the following (a) Zn + CuSO4 = (b) Fe2O3 + Al =
Balance the following equations (a) H2SO4+ NaOH = Na2SO4+H2O (b) Ba(OH)2+ HBr =BaBr2 + H2O (c) KCN + H2SO4 = K2SO4+HCN (d) Al + HCl = AlCl3 + H2O (e) CH4 + O2 = CO2 + H2O
Write balanced equation for the following reactions and identify the type of reaction (a) Zinc Carbonate gives Zinc Oxide plus Carbon dioxide (b) Magnesium plus Hydrochloric acid gives Magnesium Chloride plus Hydrogen (c) Potassium Bromide plus barium Iodide gives Potassium Iodide plus Barium Bromide (d) Hydrogen plus Chlorine gives Hydrogen Chloride
What is exothermic reaction and endothermic reaction? Give examples
What is a balanced chemical equation? Why should chemical equation be balanced?
What is the difference between displacement reaction and double displacement reaction? Write equation for these reactions
Zn+CuSO4=-------------- Fe2O3+Al=------------
What is the chemical equation of Zinc metal reacts with liquid Hydrochloric acid to produce a solution of Zinc chloride and Hydrogen gas
Explain in terms of electrons transfer (a)Oxidation (b) Reduction
what are the steps under taken to balance an chemical equation ?
What are IONS ?
1.what you mean by redox reactions? 2.Na+H2O GIVES NAOH+H2. EXPLAIN THIS EQUATION.