9th Class Chemistry Guess Paper 2019

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Guess Paper of Chemistry 9th Class

  • Define electro negativity?
  • Define electroplating. ?
  • Define electrochemistry?
  • Define empirical formula with example. ?
  • Define freezing point. ?
  • Define evaporation. Write the name of factors which effect evaporation?
  • A patient has goitre. How will it be detected?
  • Calculate the number of atoms in 10 grams of Aluminium (Al).
  • A solution contains 50 g of sugar dissolved in 450 g of water. What is concentration of this solution?
  • Calculate the number of moles In 84 gram carbon?
  • Can you cool a gas by increasing it volume?
  • Can pure gold be used for making electrical wires?
  • Define Allotropy?
  • Define atomic mass unit. Why is it needed?
  • Define aqueous solution?
  • Define Avogadro’s number?
  • Define boiling point?
  • Define Biochemistry?
  • Define Boyle’s rule?
  • Define hydrogen bonding. ?
  • Define chemical bond?
  • Define industrial chemistry?
  • Define ionic bond?
  • Define intermolecular forces?
  • Differentiate between strong and weak electrolytes. ?
  • Do you know any element having no neutrons in its atoms?
  • Distinguish between amorphous solid and crystalline solid ?
  • Explain the electronic concept of reduction?
  • Define morality and writes its unit?
  • Define Ionization energy?
  • Define nuclear fission reaction?
  • Describe the process that takes place in the electrolysis of molten Nacl?
  • Define transition temperature. ?
  • Differentiate between lone pair and bond pair of electrons. ?
  • Differentiate between Polar and non-polar covalent bond. ?
  • Differentiate between molecular mass and formula mass?
  • Differentiate between solute and solvent with examples of each?
  • Define oxidizing agent?
  • Define organic chemistry?
  • Define physical chemistry and biochemistry?
  • Define reducing agent. ?
  • Define pressure and write its unit?
  • Define relative atomic mass. ?
  • Give the applications of silver.
  • Give scope of Bio Chemistry.
  • Give the difference between electrolytic cell electrochemical cells.
  • Give the example and formula of mass by volume percent.
  • Give the electronic configuration of carbon atom.
  • Give the physical properties of sodium and its uses.
  • Give the reasons: Soft drink is a mixture and water is a compound.
  • Give the Properties of dipole-dipole forces.
  • Give the trend of ionization energy in a period.
  • How can you define atomic radius?
  • Give two postulates of Bohr’s atomic theory.
  • Define solubility?
  • Define supersaturated solution?
  • Define standard atmosphere pressure?
  • Define the empirical formula an example?
  • Explain the relationship between mass and mole of substance?
  • Define the term allotropy with examples?
  • Explain the term absolute zero?
  • Explain the trend of electron affinity in periodic table?
  • Explain the term oxidation on the basis of electronic concept with an example.
  • Find out the mass of 3 moles of oxygen atoms?
  • Give Characteristics of suspension.
  • For what purpose is u-235 used?
  • Give experimental verification of Charles’s law,
  • Give one example each of the use of radioactive isotope in medicine and radio therapy.
  • Give the characteristics of cathode rays.
  • Give physical properties of calcium and its uses
  • How can you differentiate between molecular formula and empirical formula?
  • Give properties and uses of gold?
  • How can you differentiate between organic and inorganic chemistry?
  • How non-metals are essential part of our body structure?
  • How can you justify the milk is colloid?
  • How oxygen reacts with group II A metals?
  • How you can explain the solute-solvent interaction to prepare a NaCl solution?
  • How to atoms follow octet rule?
  • In electroplating of chromium, which salt is used as an electrolyte?
  • Metals are good conductor of electricity. Why?
  • Ionic compounds are solids justify.
  • Name the by-products produced in Down’s cell
  • State the physical properties of metals
  • Oxidation and reduction proceed simultaneously. Explain with an example.
  • How can you prove that angular momentum is quantized?
  • How coordinate covalent bond is formed in the hydronium ion?
  • How can you test that the given
  • How electro negativity does differ from electron affinity?
  • How electroplating of zinc is carried out?
  • How electroplating of tin on steel carried out?
  • How is periodicity of properties dependent upon number of protons in an atom?
  • State three reasons why do you think air is a mixture and water a compound.
  • How many neutrons are present in C-12 and C-13?
  • They can cast a sharp shadow of an opaque object if placed in their path
  • What are crystalline solids?
  • What are alkali and alkaline-earth metals?
  • What are Halogens? Describe the position of halogen in periodic table?
  • What are radioactive isotopes?
  • What are intermolecular forces?
  • What are SI units of atomic radius?
  • What do you mean by metallic character?
  • What do you mean by malleability?
  • What do you mean by periodic function?
  • What do you mean by volume?
  • What do you mean by shielding effect?
  • What happens to cathode in the galvanic cell?
  • What is corrosion?
  • What is absolute temperature? Write its value
  • What is Dielectric Constant?
  • What are synthetic adhesives?
  • What are spontaneous and non-spontaneous reactions?
  • What are the Defects in Long Form of Periodic Table?
  • What are the salient features of Rutherford’s atomic model?
  • What are the defects of Rutherford atomic model?
  • What are transition metals?
  • What do you mean by condensation?
  • What did you mean by the Thermal conductivity of the metallic compounds?
  • What do you mean by groups and periods in the periodic table?
  • What is difference between boiling point and evaporation?
  • What is difference between Amorphous and crystalline solids?
  • What is difference between colloids and suspensions?
  • What is difference between steel and stainless steel?
  • What is difference between diffusion and effusion?
  • What is meant by groups and periods In the periodic table?
  • What is meant by magnesium ribbon and where it use? What is meant by metric bond?
  • What is meant by periodicity of properties?
  • What is meant by mixture? Also give its one example
  • What is meant by Molar Solution? How it is prepared
  • What is meant by volume / volume %?
  • What is difference between valency and oxidation state?
  • What is octet rule?
  • What is different between steel a stainless steel?
  • What is electrolysis?
  • What is diffusion, explain with an example?
  • What is Lewis Structure Diagram?
  • What is meant by atomic radius?
  • What is Luther Meyer’s atomic volume curve?
  • What is meant by Brine?
  • What is meant by chemical reactivity?
  • What is meant by carbon-dating?
  • What is meant by colloid? Give two examples.
  • What is meant by dipole-dipole forces?
  • What is meant by condensation?
  • What is the difference between colloid and suspension?
  • What is the difference between Mendeleev’s periodic law and modern periodic law?
  • What is the difference between corrosion and rusting?
  • What is the major difference between a solution and a mixture?
  • What is the relationship between evaporation and boiling point of liquid?
  • What is the maximum capacity of a shell?
  • What is the relative atomic mass? How it is related to gram?
  • What is relationship between electro positivity and ionization energy?
  • What is the oxidation number Carbon in Na2CO3?
  • What is salt bridge?
  • What is the cause of polarity in covalent bond?
  • What is second ionization energy and how is it represented?
  • What is the principle of rusting?
  • What is the definition of the element according to the Robert Boyle?
  • What is the relationship between evaporation and boiling point of liquid?
  • What is the significance of the symbol of an element?
  • What is the relative atomic mass? How it is related to gram?
  • What is the trend of variation it densities of alkali metals?
  • Which metal is used for metal work?
  • What is the unit of concentration?
  • What is the significance of the symbol of an element?
  • What is the unit of concentration?
  • What is the trend of variation it densities of alkali metals?
  • Which metal is used for metal work?
  • What is the nature of electrode used in electrolyzing of chromium?
  • What is the nature of charge on cathode rays?
  • Which one of the following solutions is more concentrated: one molar or three molar
  • Why a covalent bond becomes polar?
  • Which solution is used as electrolyte in Nelson’s cell?
  • Why a solution is considered mixture?
  • Why and how elements arranged in a period?
  • Why an iron grill is pointed frequently?
  • Why are liquids mobile?
  • Which solution is used as electrolyte in Nelson’s cell?
  • Which metal is used for metal work?
  • Why a covalent bond becomes polar?
  • Why an iron grill is pointed frequently?
  • Why a solution is considered mixture?
  • What is triple covalent bond explain with an example?
  • What type of elements from metallic bond?
  • What type of covalent bond is formed in nitrogen molecule?
  • What you know about Epoxy adhesives?
  • Which element has the highest electro negativity?
  • When does an electron emit or absorb energy?
  • Which form of sculpture exists at room temperature?
  • Why and how elements arranged in a period?
  • Which is lighter than aluminium of gold?
  • Why are liquids mobile?
  • Why the alloys are considered solutions?
  • Why silver and gold are least reactive?
  • Why the gases are compressible?
  • Why the size of atom decreases in a period?
  • Why the ionization energy of Na more than K?
  • Why valency of chlorine is 1?
  • Write down any three isotopes of uranium.
  • Why we stir paints thoroughly before using?
  • Why magnesium is harder than sodium?
  • Why are the colloids quite stable?
  • Why noble gases are not reactive?
  • Why are the densities of gases lower than that of liquids?
  • Why chlorine can accept only 1 electron?
  • Why calcium is more electropositive tan to magnesium?
  • Why do atoms react?
  • Why does not the suspension form homogeneous mixture?
  • Why does ice float on water?
  • Why does sodium forma chemical bound with chloride?
  • Why ionic compounds are easily soluble in water?
  • Why have water polar covalent bonds?
  • Why ionization energy Na is less than Mg?
  • Why valency of chlorine is 1?
  • Why is HF a weak acid?
  • Why do you mean by malleability?
  • Why does not the suspension form homogeneous mixture?
  • Why does ice float on water?
  • Why does sodium forma chemical bound with chloride?
  • Why ionic compounds are easily soluble in water?
  • Why have water polar covalent bonds?
  • Why ionization energy Na is less than Mg?
  • Why platinum is used for making Jewellery?
  • Why is HF a weak acid?
  • Why reactivity of metals increase drown the group?
  • Why reactivity of metals increase drown the group?
  • Why platinum is used for making Jewellery?
  • Why silver and gold are least reactive?
  • Write down any two properties of canal rays.
  • Why the alloys are considered solutions?
  • Why noble gases are not reactive?
  • Write down electronic configuration of chlorine
  • Write two chemical properties of metals and non-metals
  • Write down the names of elements of group 1 with their symbols?
  • Why magnesium is harder than sodium?

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