CBSE Class 11 Chemistry Some Basic Concepts Worksheet Set 01

Class 11 Chemistry Practice Set: Chapter 01 Some Basic Concepts of Chemistry

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SOME BASIC CONCEPTS IN CHEMISTRY
 
1. (i) State the law of multiple proportions.
(ii) Sulphur forms two gaseous oxides. One of these oxides contains 50 % Sulphur while the other contains 40 % of sulphur. Show that these data illustrate the law of multiple proportions.
 
2. State the following laws:
i) Avogadro’s law
ii) Law of constant proportion
iii) Gay Lussac’s law
 
3. If the density of methanol is 0.793kgl-1What is its volume needed for making 2.5l of its 0.25 M solution ?
 
4. Why do atomic masses of most of the elements in atomic mass unit involve fraction?
 
5. 200ml of 0.05M magnesium chloride is mixed with 75ml of 0.1M silver nitrate solution. Find the number of moles and mass in grams of AgCl formed. What is the limiting reagent?
 
6. 24g of NaOH is dissolved in 300ml water. Calculate the molarity of the solution.
 
7. 4.8g of O2 was used to burn 0.15moles of Fe to Fe2O3. What mass of Fe2O3 was formed?
 
8. (i) What do you understand by the term limiting reagent?
(ii) 6.5g of Zn was reacted with excess of dil. HCl. Calculate the amount and volume of hydrogen produced at STP.
 
9. A compound contains 2.68% Mg. How many atoms of magnesium are present in 15g of the compound?
 
10. Calculate the percentage of (i) copper (ii) sulphur (iii) oxygen and (iv) water of hydration in crystalline copper sulphate, CuSO4.5H2O
 
11. A higher oxide contains 80% metal. 0.72g of lower oxide gave 0.8g of higher oxide when oxidized. Show that this is in agreement with the law of multiple proportions.
 
12. 1.8g of an organic compound on combustion gave 2.64g of CO2 and 1.08g of water. Find the empirical formula of the compound.
 
13. Calculate the mass of the following in Kg
(i) one calcium atom
 

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Download CBSE Practice Material: Class 11 Chemistry Chapter 01 Some Basic Concepts of Chemistry

Download Practice Sheet: Chapter 01 Some Basic Concepts of Chemistry (Class 11 Chemistry)

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