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Chemistry sample set 1 old is gold

 Sample Question (Set-1 ) Solution  from Old is Gold 

Question is taken from Asmitas  Question bank Old is Gold  Grade XI {science} for 2078

                           Group- A 

  1. Dalton's law of partial pressure is not applicable for
  2. What quantity of limestone on heating will give 56 kg of CaO
  3. The coupling between base units of DNA is through
  4. Atomic mass of an element is equal to number of
  5. Law of electrolysis was given by
  6. Emetil never found  
  7. Electrometallurgy is employed for extraction of
  8. Sodium extract of an organic compound gives blood red colour with fecl3 it contains
  9. An isomers of ethanol is
  10. Which of the following is a basic oxide
  11. The common variety of coal is



                              Group -B 
  1.  Alkynes form homelegance of hydrocarbon the first four straight chain alkanes are shown below methane ch4 ethane ch3ch3 propane ch3ch2ch3 butane ch3ch2ch2ch3 
  • What is meant by the term hydrocarbon
  • Give the general formula of alkane
  • Give the molecular formula of hexane the sixth member of the series
  • IIT home logo series has its own general formula state two characteristics of a homologous series




2. Alkanes undergo electrophilic addition reaction to form saturated compounds
  • Define the term electrophile
  • The reaction between grooming and methyl propane is an electrophile academician described with the aid of Kali errors the mechanism for this reaction show the intermediate and the product along with any relevant dipoles and lone pair of electrons


3. Define the terms
  • Atomic number
  • Mass number
  • Relative atomic mass
  • Give the electronic configuration of an atom of the isotope of calcium 20Ca45 and indicating group and period



4. Sodium and sodium hydroxide are both manufactured by electrolytic process
  • Name the electrolyte used in the manufacture of sodium hydroxide
  • What is produced at annode  during manufacture of sodium hydroxide
  • Give one use of sodium and sodium hydroxide


5. During the  manufacture of sulphuric acid in the contact process sulphur dioxide reacts with oxygen in a reversible reaction to form sulphur trioxide
  • Write an equation to show the reaction between sulphur dioxide and oxygen
  • Give the name of the catalyst and the value of temperature and pressure used
  • Give one large scale use of sulphuric acid





6. Ammonia is manufactured from nitrogen and hydrogen in haber process
  • What is meant by the term dynamic equilibrium
  • State the conditions employed industrially in the manufacture of ammonia and justify them on physico-chemical ground
  • Give one fertilizers with the formula which is formed by ammonia



7. Identify the solid remaining when each of the following is heated
  • Lithium nitrate
  • Potassium nitrate
  • Calcium nitrate


8. Electrolysis finds many applications both in experimental and industrial products
  • Write an example of disproportionation 
  • Give one typical behaviour of metal


9. Complete the following table
Element.                 State at Room Temprature
Chlorine
Bromine
Iodine

  • Describe the chemical test for chlorine
  • Chlorine gas reacts with hydrogen to form hydrogen chloride gas name the type of bonding in hydrogen chloride gas
  • Explain why HCL gas is soluble in water
  • A solution of HCL reacts with  solid calcium carbonate write the equation for this reaction in side include the state of symbol 



10. Draw the shape of each of the following molecule and mark on the diagram of value of bond angle in each case
  • CH4
  • NH3
  • BeCl3
Nitrogen and phosphorus are in the same group of the periodic table phosphorus and hydrogen form the compound phosphine,PH3  nitrogen and hydrogen form ammonia ,NH3
  • State the number of Bond pair and lone pair of electrons in a molecule of phosphine and ammonia
  • Explain why the boiling temperature of phosphine is lower than that of ammonia



11. Student carries out titration to find the concentration of some hydrochloric acid

 20g of 40% pure CaCO3 if reacted with 5g of HCl to produce CaCl2, H2O  and CO2
  • Find which one is limiting reactant and why ?
  • Calculate of mass of cacl2 formed ?
  • How many number of water molecules are produced
  • Calculate the volume of co2 produced at 27 degree Celsius and 0.5 atm pressure




             


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