Intermediate Part-I 
(Session 2015-2017)
Chemistry PAPER-I
TIME ALLOWED:20 Minutes
Group-I
Maximum Marks:17
Note: you have four choices for each objective type questions as A, B,C and D. The choice which you think is correct, fill that circle in front of that question number. Use marker or pen to fill the cuircles. Cutting or filling two or more circles will result in zero mark in that question. Attempt as many questions as given in objective type question paper and leave others blank. No credit will be awarded in case BUBBLES are not filled. Do not solve question on this objective paper.

Question#1

• Isotopes differ in
  
  (a) Properties which depend upon mass
  (b) Arrangement of electrons in orbitals
  (c) Chemical properties
  (d) The extent to which they may be affected in electromagnetic field
  
  
• 27 g of Al will react completely with____ to produce Al ₂  o _{3 .}
  
  (a) 8 g of oxygen
  (b) 16 g of oxygen
  (c) 32 g of oxygen
  (d) 24g of oxygen
  
  
• Solvent extraction method is a particulary useful technique for sepration when the product to be seprated is:
  
  (a) Non volatile or thermally unstable
  (b) volatile or thermally stable
  (c) Non volatile or thermally stable
  (d)volatile or thermally unstable
  
  
• Number of Molecules in one dm ³ of water is close to:
  
  (a) (6.02/22.4) x 10²³
  (b) (12.04/22.4) x 10²³
  (c) (18/22.4) x 10²³
  (d) (55.6/22.4) x 10²³
  
  
• If absolute temperature ofa gas is doubled and the pressure is reduced to one half, the volume of the gas will be:
  
  (a) Remain unchanged
  (b) Increase four times
  (c) Reduced to1/4
  (d) Be doubled
  
  
• When water freezes at 0°C its density decreases due to:
  
  (a) Cubic structure of ice
  (b) Empty spaces present in the structure of ice
  (c) Change of bond length
  (d) Change of bond anles
  
  
• Ionic solids are characterized by
  
  (a) Low melting point
  (b) Good conductivity in solid states
  (c) High vapour pressure
  (d) Solubility in polar solvents
  
  
• The nature of the positive rays depend on:
  
  (a) The nature of the electrode
  (b) The nature of the discharge tube
  (c) The nature of the residual gas
  (d) Nature of the glass
• Quantum number values for 2p orbitals are
  
  (a) N=2,l=1
  (b) N=1 ,l=2
  (c) N=1,l=0
  (d) N=2,l=0
  
  
• ______ has the highest %gae of ionic character.
  
  (a) HCl
  (b) HBr
  (c) HF
  (d) HI
• ______ Molecules has zero dipole moment.
  
  (a) CO
  (b) H ₂ S
  (c) So₂
  (d) CH₄
  
  
• In endothermic reactions,the heal content of the:
  
  (a) Products is more than that of reactants
  (b) Reactants is more than that of products
  (c) Reactants and products are equal
  (d) Both B and C
  
  
• The ph of mol dm^-3 of an aqueous solution of HS₂O₄ is:
  
  (a) 3
  (b) 7
  (c) 2
  (d) 5
  
  
• The value of Kw at 25˚ C is :
  
  (a) 11 x 10^-11
  (b) 30 x 10^-11
  (c) 1 x 10^-11
  (d) 3 x 10^-11
  
  
• A solution of golucuse is 10% w/v.The volume in which 1 g mole of it is dissolved will be.
  
  (a) 1dm³
  (b) 8 dm³
  (c) 200cm³
  (d) 900cm³
  
  
• If the salt bridge is not used between two half cells,then the voltage:
  
  (a) Decrease rapidly
  (b) Decrease slowly
  (c) Does not change
  (d) Drops to zero
  
  
• In zero order reaction, the rate of independent of:
  
  (a) Temperature of reaction
  (b) Concentration of reactants
  (c) Concentration of products
  (d) Concentration of catalyst

Intermediate Part-I (11^th class)
(Session 2015-2017)
Chemistry PAPER-I
TIME ALLOWED:2:40 Hours
Group-II
Maximum Marks:68
Subjective
Section-I

2. Attempts any eight parts. (8x2=16)

• Calculate mole in 0.1 gm of sodium?
• Differentiate between atom and molecule?
• Write two assumptions of Stoichiomistry?
• State distribution law?
• Iodine is more soluble in water in presence of Ki, Explain?
• What is Plasma? Give its one application?
• Calculate value of Gas constant (R) in SI-units?
• State Grahams law of diffusion and write its mathematical form?
• State colligative properties Name two important Colligative property?
• Differentiation between ideal and non-ideal solution?
• Write two uses of buffer solutiuons?
• Differentiation between reversible and irreversible reaction?

3. Attempts any eight parts. (8x2=16) 

• Describe that ionic Crystals and highly brittle?
• Define Polymorphism with example?
• Give two uses of liquid crystals?
• Explain that vapour pressure of solids are far less than those of liquids?
• State the moseleye’s law?
• Write the nuclear equation for the discovery of Neutrons?
• Whichever gases used in the discharge tube,the nature of the cathode rays remains the same?
• What is the origin of Line Spectrum?
• Define Morality .write its mathematical formula?
• Calculate the oxidation number of chromium in the following compounds:
  (a) CrCl₃
  (b) K₂CrO₄
• What is the salt bridge?
• She acts asa node when connected with Cu electrode but as cathode withZn electrode.Explain it?

4.Attempt any six questions (6x2=12)

• Why M.O.T is superior to VBT?
• What is bond order? explain
• The dipole moment of CO ₂ is zero but that of H₂ o is1.85 D,why?
• Why sigma bond is stronger than that of Pi bond?
• Define Enthalpy of the equation?
• What is spontaneous reaction?give example.
• Define rate of a reaction?
• Explain the term Catalysis with example?
• Define first order reaction with example?

Note: Attempt any THREE questions:

Question#5
(a) A well known ideal gas is enclosed in a container having volume 500cm³ at STP. Its mass comes out to be 0.72gm. What is the molar mass of this gas?
(b) What are Ionic Solids? Give three properties of Ionic solids.

Question#6
(a) State Graham’s law of diffusion and verify this law an experiment.
(b) Derive the equation for the radius of nth orbit of hydrogen atom using Bohr’s Model

Question#7 
(a) Explain ionization energy giving one example. Also discuss its periodic trend.
(b) Describe the Hess’s law of constant heat summation with the help of two examples.

 Question#8
(a) Ca(OH)₂ is a sparingly soluble compounds. Its solubility product is 6.5x10^-6. Calculate the solubility of Ca(OH)₂
(b) What is Enzyme catalysis? Give an example. Also give four characteristics of Enzyme catalysis.

Question#9
(a) Describe the measurement of Elevation of boiling points by Lands Berger’s[method with diagram.
(b) Write two applications of electrochemical series.