Question Paper - Chemistry 2015 - 2016-H.S.C-12th Board Exam Maharashtra State Board (MSBSHSE)



      Forgot password?

View all notifications
Books Shortlist
Your shortlist is empty
Year2015 - 2016 (March)




  1. All questions are compulsory.
  2. Answers of both the sections should be written in same answer book.
  3. Draw well labelled diagrams and write balanced equations wherever necessary.
  4. Figures to the right indicate full marks.
  5. Use of logarithmic table is allowed.
  6. Every new question must be started on a new page.


Marks: 70
Q: 1 | Answer any six of the following[12]
Q: 1.1[2]

What is ferromagnetism?

Explain the following with suitable examples:


view solution

Iron (z=26) is highly ferromagnetic. Explain.

view solution
Q: 1.2[2]

Define boiling point

What is 'boiling point'?

view solution

Write the formula to determine the molar mass of a solute using freezing point depresssion method.

view solution
Q: 1.3 | Write mathematical equation of first law of thermodynamics[2]
Q: 1.3.1[1]

Write mathematical equation of first law of thermodynamics for Adiabatic process

view solution
Q: 1.3.2[1]

Write mathematical equation of first law of thermodynamics for Isochoric process

view solution
Q: 1.4[2]

Explain a graphical method to determine activation energy of a reaction.

view solution
Q: 1.5 | Write the names and chemical formulae[2]
Q: 1.5.1[1]

Write the names and chemical formulae of any one ore of iron.

view solution
Q: 1.5.2[1]

Write the names and chemical formulae of any one ore of zinc.

view solution
Q: 1.6[2]

Define enthalpy of sublimation.

Explain enthalpy of sublimation.

view solution

How is enthalpy of sublimation related to enthalpy of fusion and enthalpy of vaporization?

view solution
Q: 1.7[2]

What are Ellingham's diagrams? Write 2 features of it.

view solution
Q: 2 | Answer any 3 of the following[9]
Q: 2.1[3]

Silver crystallises in FCC structure. If density of silver is 10.51 gcm-3, calculate the volume of unit cell.

[Atomic mass of slive (Ag) = 108 gm-1]

view solution
Q: 2.2[3]

The vapour pressure of pure benzene is 640mm og Hg. 2.175×10-3kg of non-vloatile solute is added to 39 gram of benzene the vapour pressure of solution is 600mm of HG. Calculate molar mass of solute.

[C = 12, H = 1]

view solution
Q: 2.3[3]

Calculate C-Cl bond enthalpy from following reaction:

CH3Cl(g) + Cl2(g) → Ch2Cl2(g) + HCl(g) ΔH° = -104KJ

If C-H, Cl-Cl and H-Cl bond enthalpies are 414, 243 and 431 KJ-Mol-1 respectively.

view solution
Q: 2.4[3]

Define cell constant.

What is the cell constant?

view solution

Draw a neat and well labelled diagram of primary reference electrode.

view solution
Q: 3 | Answer any ONE of the following[7]
Q: 3.1[7]
Q: 3.1.1[2]

Write four points of differences between properties of nitrogen and other elements of group 15.

view solution
Q: 3.1.2[1]

Explain the structure of ClF3

view solution
Q: 3.1.3[3]

Conductivity of a solution is 6.23 x 10-5  Ω-1cm-1 and its resistance is 13710Ω. If the electrodes are 0.7cm apart, calculate the cross-sectional area of electrode.

view solution
Q: 3.1.4[1]

Why is molality of a solution independent of temperature?

view solution
Q: 3.2[7]
Q: 3.2.1[1]

What are neutral oxides?

view solution
Q: 3.2.2[2]

Explain the nature of zinc oxide with the help of the reactions.

view solution
Q: 3.2.3[1]

Define "Molar conductivity".

view solution
Q: 3.2.4[1]

Define "zero order reaction".

view solution
Q: 3.2.5[2]

In a first order reaction x → y, 40% of the given sample of compound remains unreacted in 45 minutes. Calculate rate constant of the reaction.

view solution

Define "zero order reaction".

view solution
Q: 4 | Select and write the most appropriate answer from the given alternatives for each sub-question[7]
Q: 4.1[1]

The molecular formula H2S2O2 represents which oxoacid?

  • Hydrosulphurous acid
  • Thiosulphurous acid
  • Sulphuric acid
  • Pyrosulphurous acid
view solution
Q: 4.2[1]

Iodine exists as

  • polar molecular solid
  • ionic solid
  • nonpolar molecular solid
  • hydrogen bonded molecular solid
view solution
Q: 4.3[1]

Absolute entropies of solids, liquids and gases can be determined by

  • Measuring heat capacity of substance at various temperatures
  • Subtracting standard entropy of reactants from products
  • Measuring vibrational motion of molecules
  • Using formula ΔS° = ST° - SO°
view solution
Q: 4.4[1]

The determination of molar mass from elevation in boiling point is called as

  • cryoscopy
  • colorimetry
  • ebullioscopy
  • spectroscopy
view solution
Q: 4.5[1]

The process of leaching alumina, using sodium carbonate is called

  • Bayer's process
  • Decomposition
  • Cyanide process
  • Hall's process
view solution
Q: 4.6[1]

On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be

  • 1
  • 2
  • 3
  • 4
view solution
Q: 4.7[1]

A → B is a first order reaction with rate 6.6 × 10-5m-s-1. When [A] is 0.6m, rate constant of the reaction is

  • 1.1 × 10-5s-1
  • 1.1 × 10-4s-1
  • 9 × 10-5s-1
  • 9 × 10-4s-1
view solution
Q: 5 | Answer any SIX of the following [12]
Q: 5.1[2]

Why is Sc3+ colourless while Ti3+ coloured? (Atomic number Sc = 21, Ti =22)

view solution
Q: 5.2[2]

Illustrate with example, the difference between a double salt and a co-ordination compound

view solution
Q: 5.3[2]

How is chlorobenzene prepared from aniline?

view solution

How is chlorobenzene converted into diphenyl?

view solution
Q: 5.4[2]

What is metamerism? 

view solution

Explain metamerism with suitable examples of ethers

view solution
Q: 5.5[2]

What are ketones? 

view solution

How are ketones classified?

view solution
Q: 5.6[2]

How is 1-nitropropane prepared from suitable oxime?

view solution

How are  2 - nitropropane prepared from suitable oxime?

view solution
Q: 5.7[2]

Define antioxidants?

Define antioxidants and mention two examples.

view solution

Draw structure of BHT.

view solution
Q: 5.8[2]

Define carbohydrates.

What are carbohydrates?

view solution

Write the reaction for the preparation of Nylon-6.

view solution
Q: 6 | Answer any THREE of the following [9]
Q: 6.1[3]

What are f-block elements? 

view solution

Distinguish between lanthanoid and actinoids.

view solution
Q: 6.2[3]
Q: 6.2.1[1]

Explain  Optical activity

view solution
Q: 6.2.2[1]

Explain  Ligand

view solution
Q: 6.2.3[1]

Explain Interstitial compounds

What are interstitial compounds?

What are interstitial compounds? Why are such compounds well known for transition metals?

view solution
Q: 6.3[3]

Write the formula of Tetraminodichloroplatinum (IV) chloridex.

view solution

 How is propene converted into 1- bromopropane and 2 - bromopropane?

view solution
Q: 6.4[3]

What are broad-spectrum antibiotics?

view solution

How are polythene and neoprene prepared?

view solution
Q: 7 | Answer any ONE of the following :[7]
Q: 7.1[7]

Explain the mechanism of esterification

view solution

Write the reactions involved in dehydration of 1°, 2° and 3° alcohols.

view solution
Q: 7.2[7]

What are vitamins?

view solution

Name any two diseases caused by deficiency of Vitamin A

view solution

Write the structure of a nucleoside

view solution

Write the structure of a nucleotide

view solution

How are 1 - nitropropane, 2-nitropropane and 2-methyl 2- nitropropane are distinguished from each other using nitrous acid?

view solution
Q: 8 | Select and write the most appropriate answers from the given alternatives [7]
Q: 8.1[1]

The preparation of alkyl fluoride from alkyl chloride, in presence of metallic fluorides is known as

(a) Williamson’s reaction                                 

(b) Finkelstein reaction

(c) Swarts reaction

(d) Wurtz reaction

view solution
Q: 8.2[1]

Identify the weakest acidic compound amongst the following

(a) p-nitrophenol                 

(b) p-chlorophenol

(c) p-cresol                         

(d) p-raminophenol

view solution
Q: 8.3[1]

On acid hydrolysis, propane nitrile gives

(a) propanal                       

(b) acetic acid

(c) propionamide

(d) propanoic acid

view solution
Q: 8.4[1]

Which of the following amines yields foul smelling product with holoform and alcoholic KOH?

(a)    Ethyl amine                   

(b)   Diethyl amine

(c)    Triethyi amine               

(d)  Ethyl methyl amine

view solution
Q: 8.5[1]

Which of the following NOT present in DNA?

(a)  adenine                        

(b) Guanine

(c) Thymine

(d) Uracil

view solution
Q: 8.6[1]

Amongst the followings, identify a copolymer?

(a) Orion                            

(b) PVC

(c) PHBV

(d) Teflon

view solution
Q: 8.7[1]

Phenelzine is used as an

(a)  analgesic                      

(b) antiseptic

(c) antipyretic

(d) antidepressant

view solution