DPP

DPP -11C13   CONCENTRATION     Q1. 120g of 𝑁𝑎𝑂𝐻 dissolved in 900g of 𝐻2𝑂 . Density of solution is 1.50g/mol. Find:-   (i) Molarity & Molality (ii) Mole fraction of both solute & solvent .     Q2. 3M 𝑁𝑎𝐶𝑙 𝑎𝑞. 𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛 has a density 1.25 g/ml. Find the molality.     Q3. 0.500M […]

DPP -11C12 MOLE CONCEPT       Q1. 12.044 × 1023 molecules of 𝐶𝑂2 at STP. Find   (i) mass of the sample given (ii) Number of moles of CO2 (iii) Volume of CO2 in L at STP (iv) Number of ‘O’ atoms. (v) Number of ‘C’ atoms.       Q2. An atom of 12𝐶.

DPP -11C11 Empirical & Molecular Formula   1. A compound contains 4.07 % hydrogen, 24.27 % carbon and 71.65 % chlorine. Its molar mass is 98.96 g. What are its empirical and molecular formulas?   2. Determine the empirical formula of an oxide of iron, which has 69.9 % iron and 30.1 % oxygen by

DPP -11C14     STOICHIOMETRY       Q1. 𝑁2 + 3𝐻2 → 2𝑁𝐻3 𝑁2 is given 2000g & 𝐻2 is 1000g. Find the amount of 𝑁𝐻3 formed after the completion of reaction.     Q2. 𝑁2 + 3𝐻2 → 2𝑁𝐻3 𝑁2 is given 50kg & 𝐻2 is 10kg. Find the amount of 𝑁𝐻3 formed

DPP-9S71 MOTION, SPEED & VELOCITY   A farmer moves along the boundary of a square field of side 10 m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position?   Usha swims in a 90 m long pool. She

DPP-10S12 BALANCING & Combination Reaction 1. Balance the following equations : Pb(NO3)2 → PbO + NO2 + O2 MnO2 + HCl →MnCl2  +  H2O + Cl2 H2S + O2→ H2O + SO2 Al2(SO4)3+ BaCl2 → AlCl3 + BaSO4 Al(OH)3  + (NH4)2SO4→ Al2(SO4)3 + NH4OH 2. A solution of a substance ‘X’ is used for whitewashing. (i) Name the substance ‘X’ and write its formula.

DPP-9S11 MATTER & PROPERTIES     Define matter. What happens when kinetic energy of the particles increases? What are the characteristics of particles? Mention the properties of Solid. Differentiate between Liquid and solid on the basis of the movement of their particles. Download Word file Download PDF

DPP-10S11 CHEMICAL EQUATION & BALANCING     1. Write the chemical formula : Potassium Bromide Hydrogen Sulphide Aluminium Sulphate Ammonium Phosphate 2. Convert the following into Equations : Hydrogen sulphide gas burns in air to give water and sulphur dioxide. Barium chloride reacts with aluminium sulphate to give aluminium chloride and barium sulphate. Potassium bromide+ Barium