HSC Science (Computer Science) 12th Board ExamMaharashtra State Board
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Chemistry 2016-2017 HSC Science (Computer Science) 12th Board Exam Question Paper Solution

Login
Create free account


      Forgot password?
Chemistry
2016-2017 July
Marks: 70

[7]1 | Select and write the most appropriate answer from the given alternatives for each sub-question:
[1]1.1

Which of the following is a basic oxide?

(A) SiO2

(B) P4O10

(C) MgO

(D) Al2O3

Concept: P - Block Group 15 Elements - Oxides of Nitrogen
Chapter: [7.01] Group 15 Elements
[1]1.2

In the representation of galvanic cell, the ions in the same phase are separated by a _______.

(A) single vertical line

(B) comma

(C) double vertical line

(D) semicolon

Concept: Galvanic Cells - Introduction
Chapter: [4] Electrochemistry
[1]1.3

An ionic crystal lattice has limiting value of radius ratio as 0.414 to 0.732; the co-ordination number of its cation is _______.

(A) 6

(B) 4

(C) 3

(D) 12

Concept: Crystal Lattices and Unit Cells - Introduction
Chapter: [1] Solid State
[1]1.4

The unit of rate constant for zero order reaction is _______.

(A) t–1

(B) mol dm–3 t–1

(C) mol–1 dm3 t–1

(D) mol–2 dm6 t–1

Concept: Integrated Rate Equations - Half-life of a Reaction
Chapter: [5] Chemical Kinetics
[1]1.5

Calcium carbonate used in the extraction of iron acts as _______.

(A) oxidising agent

(B) reducing agent

(C) gangue

(D) flux

Concept: General Principles and Processes of Isolation of Elements - Principles and Methods of Extraction - Concentration
Chapter: [6] General Principles and Processes of Isolation of Elements
[1]1.6

10.0 grams of caustic soda when dissolved in 250 cm3 of water, the resultant gram molarity of solution is _______.

(A) 0.25 M

(B) 0.5 M

(C) 1.0 M

(D) 0.1 M

Concept: Conductance of Electrolytic Solutions - Variation of Conductivity and Molar Conductivity with Concentration
Chapter: [4] Electrochemistry
[1]1.7

55 L atm of work is obtained when 1.0 mole of an ideal gas is compressed isothermally from
a volume of 28.5 L to 18.5 L, the constant external pressure is

(A) 5.05 atm

(B) 5.5 atm

(C) 0.05 atm

(D) 0.55 atm

Concept: Chemical Thermodynamics and Energetic - Work, Heat, Energy, Extensive and Intensive Properties
Chapter: [3] Chemical Thermodynamics and Energetic
[12]2 | Answer any SIX of the following:
[2]2.1

State Henry’s law.

Concept: Solubility - Solubility of a Gas in a Liquid
Chapter: [2] Solutions and Colligative Properties

What is the effect of temperature on solubility of a gas in a liquid?

Concept: Solubility - Solubility of a Gas in a Liquid
Chapter: [2] Solutions and Colligative Properties
[2]2.2

How is nitric acid prepared by Ostwald’s process?

Concept: P - Block Group 15 Elements - Nitric Acid
Chapter: [7.01] Group 15 Elements
[2]2.3

Classify the following solids into different types:

a. Ammonium phosphate

b. Brass

c. S8 molecule

d. Diamond

Concept: Classification of Crystalline Solids
Chapter: [1] Solid State
[2]2.4

Construct a labelled diagram for the following cell:

`Zn|Zn^(2+)(1M)||H^+(1M)|H_(2(g,1atm))|Pt`

Concept: General Principles and Processes of Isolation of Elements - Principles and Methods of Extraction - Concentration
Chapter: [6] General Principles and Processes of Isolation of Elements
[2]2.5

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

Concept: P - Block Group 16 Elements - Simple Oxides
Chapter: [7.02] Group 16 Elements
[2]2.6

Write the names and chemical formulae of any ‘two’ minerals of aluminium.

Concept: Occurrence of Metals
Chapter: [6] General Principles and Processes of Isolation of Elements
[2]2.7

The rate law for the reaction

`2H_(2(g))+2NO_((g))->N_(2(g))+2H_2O_((g))`

is given by rate= `K[H_2][NO]^2`

The reaction occurs in the following two steps:

a. `H_(2(g)) +2NO_((g))->N_2O_((g))+H_2O_((g))`

b. `N_2O_((g))+H_(2(g))->N_(2(g))+H_2O_((g))`

What is the role of N2O in the mechanism? What is the molecularity of each of the elementary steps?

Concept: Rate of a Chemical Reaction
Chapter: [5] Chemical Kinetics
[2]2.8

Write mathematical equation of first law of thermodynamics for Adiabatic process

Concept: Chemical Thermodynamics and Energetic - First Law of Thermodynamics
Chapter: [3] Chemical Thermodynamics and Energetic

Write mathematical equation of first law of thermodynamics for Isochoric process

Concept: Chemical Thermodynamics and Energetic - First Law of Thermodynamics
Chapter: [3] Chemical Thermodynamics and Energetic

Write the mathematical expression of the First Law of Thermodynamics for  Isothermal Process

Concept: Chemical Thermodynamics and Energetic - First Law of Thermodynamics
Chapter: [3] Chemical Thermodynamics and Energetic

Write the mathematical expression of the First Law of Thermodynamics for the Isobaric process

Concept: Chemical Thermodynamics and Energetic - First Law of Thermodynamics
Chapter: [3] Chemical Thermodynamics and Energetic
[9]3 | Answer any THREE of the following:
[3]3.1

From the following data for the liquid phase reaction A → B, determine the order of reaction
and calculate its rate constant 

t/s 0 600 1200 1800
[A]/`molL^-1` 0.624 0.446 0.318 0.226
Concept: Rate of a Chemical Reaction
Chapter: [5] Chemical Kinetics
[3]3.2

Calculate the standard enthalpy of combustion of CH3COOH(l) from the following data:

`Delta_fH^@(CO_2)=-393.3 kJ mol^-1`

`Delta_fH^@(H_2O)=-285.8 kJ mol^-1`

`Delta_fH^@(CH_3COOH)=-483.2 kJ mol^-1`

Concept: Chemical Thermodynamics and Energetic - Enthalpy of Bond Dissociation
Chapter: [3] Chemical Thermodynamics and Energetic
[3]3.3

Write the cell representation and calculate equilibrium constant for the following redox reaction:

`Ni_((s))+2Ag_((aq))^+ (1M)->Ni_((aq))^(2+)(1M)+2Ag_((s)) " at "25^@ C`

`E_(ni)^+`=-0.25V and `E_(Ag)^+=0.799V`

Concept: Oxidation Reduction
Chapter: [6] General Principles and Processes of Isolation of Elements
[3]3.4

What is the action of concentrated sulphuric acid on phosphorous pentachloride

Concept: P - Block Group 16 Elements - Sulphuric Acid
Chapter: [7.02] Group 16 Elements

What is the action of concentrated sulphuric acid on copper

Concept: P - Block Group 16 Elements - Sulphuric Acid
Chapter: [7.02] Group 16 Elements

What is the action of concentrated sulphuric acid on potassium chlorate?

Concept: P - Block Group 16 Elements - Sulphuric Acid
Chapter: [7.02] Group 16 Elements
[7]4 | Answer any ONE of the following:
[7]4.1

Define Molality

Concept: Expressing Concentration of Solutions
Chapter: [2] Solutions and Colligative Properties

Define Osmotic pressure

Concept: Colligative Properties and Determination of Molar Mass - Osmosis and Osmotic Pressure
Chapter: [2] Solutions and Colligative Properties

Write any ‘two’ advantages of calomel electrode. 

Concept: Relation Between Gibbs Energy Change and Emf of a Cell
Chapter: [4] Electrochemistry

A metal crystallises into two cubic faces namely face centered (FCC) and body centered (BCC), whose unit cell edge lengths are 3.5 Å and 3.0 Å respectively. Find the ratio of the densities of FCC and BCC.

Concept: Calculations Involving Unit Cell Dimensions
Chapter: [1] Solid State

Arrange the following oxyacids of chlorine – HClO, HClO2, HClO3, and HClO4 with respect to Increasing order of thermal stability.

Concept: P - Block Group 17 Elements - Chlorine
Chapter: [7.03] Group 17 Elements

Arrange the following oxyacids of chlorine – HClO, HClO2, HClO3, and HClO4 with respect to Increasing order of oxidizing power.

Concept: P - Block Group 17 Elements - Chlorine
Chapter: [7.03] Group 17 Elements
[7]4.2

An organic substance (M = 169 gram mol–1) is dissolved in 2000 cm3 of water. Its osmotic pressure at 12°C was found to be 0.54 atm. If R = 0.0821 L atm K–1 mol–1, calculate the mass of the solute.

Concept: Colligative Properties and Determination of Molar Mass - Introduction
Chapter: [2] Solutions and Colligative Properties

How many atoms constitute one unit cell of a face-centered cubic crystal?

Concept: Number of Atoms in a Unit Cell
Chapter: [1] Solid State

Distinguish between isothermal process and adiabatic process.

Concept: Chemical Thermodynamics and Energetic - Concepts of System
Chapter: [3] Chemical Thermodynamics and Energetic

Mention the names of various steps involved in the extraction of pure metals from their ores.

Concept: Electrochemical Principles of Metallurgy
Chapter: [6] General Principles and Processes of Isolation of Elements
[7]5 | Select and write the most appropriate answer from the given alternatives for each sub-question:
[1]5.1

In the following 

The compound ‘B’ is _______.
(A) Propan–1–amine

(B) Propan–2–amine

(C) Isopropylamine

(D) Dimethylamine

Concept: Classification of Amines
Chapter: [13.01] Amines
[1]5.2

The stability order for carbocation is _______.

(A) 2° > 3° > 1° 

(B) 3° > 2° > 1°

(C) 3° > 1° > 2°

(D) 1° > 3° > 2°

Concept: Chemical Reactions of Haloalkanes and Haloarenes - Reactions of Haloalkanes - Nucleophilic Substitution Reactions
Chapter: [10.01] Haloalkanes
[1]5.3

Effective atomic number rule is used to find _______.
(A) geometry of complex
(B) stability of complex
(C) number of isomers of complex
(D) number of possible ligands around metal ion in complex

Concept: Coordination Compounds - Importance of Coordination Compounds
Chapter: [9] Coordination Compounds [9] Coordination Compounds
[1]5.4

Which one of the following ions is coloured?
(A) Sc3+

(B) Zn2+

(C) Ti4+

(D) V2+

Concept: General Properties of the Transition Elements (D-block)
Chapter: [8.01] D-block Elements
[1]5.5

When phenol is heated with conc. HNO3 in presence of conc. H2SO4 it yields _______.

(A) o-nitrophenol

(B) p-nitrophenol

(C) 2,4,6-trinitrophenol

(D) m-nitrophenol

Concept: Phenols - Acidic Nature of Phenol
Chapter: [11.02] Phenols
[1]5.6

The secondary structure of protein is determined by _______.

(A) co-ordinate bond

(B) ionic bond

(C) hydrogen bond

(D) covalent bond

Concept: Proteins - Structure, Classification and Functions
Chapter: [14.02] Proteins
[1]5.7

Ethylidene dichloride when boiled with aqueous solution of NaOH yields _______.

(A) formaldehyde

(B) acetaldehyde

(C) acetone

(D) ethyl methyl ketone

Concept: Alcohols, Phenols and Ethers - Nomenclature
Chapter: [11.01] Alcohols [11.02] Phenols [11.03] Ethers
[12]6 | Answer any SIX of the following:
[2]6.1

How is phenol prepared from cumene?

Concept: Phenols - Methods of Preparation
Chapter: [11.02] Phenols
[2]6.2

Write a note on self oxidation-reduction reaction of aldehyde with suitable example.

Concept: Aldehydes and Ketones - Chemical Reactions of Aldehydes and Ketones - Other Reactions
Chapter: [12.01] Aldehydes and Ketones
[2]6.3

Explain basic nature of amines.

Concept: Structure of Amines
Chapter: [13.01] Amines
[2]6.4

Explain the term Antiseptics

Concept: Drugs and Their Classification
Chapter: [16.01] Chemicals in Medicines
[2]6.5

What happens when glucose is treated with hydroxylamine?

Concept: Carbohydrates - Structures of Glucose
Chapter: [14.01] Carbohydrates

What happens when glucose is treated with hydrogen cyanide?

Concept: Carbohydrates - Structures of Glucose
Chapter: [14.01] Carbohydrates
[2]6.6

Draw structure of dichromate ion

Concept: D-block Elements - Some Important Compounds of Transition Elements
Chapter: [8.01] D-block Elements

Draw structure of chromate ion

Concept: D-block Elements - Some Important Compounds of Transition Elements
Chapter: [8.01] D-block Elements
[2]6.7

How is terylene prepared?

Concept: Polymers - Nylon 66
Chapter: [15] Polymers
[2]6.8

Identify A and B in the following reaction:

`CH_3-Br+Mg"dry eather"/""A+CO_2"dry ether"/(H^+/(H_2O))B+Mg(Br)OH`

Concept: Introduction of Haloalkanes and Haloarenes
Chapter: [10.01] Haloalkanes [10.02] Haloarenes
[3]7 | Answer any THREE of the following:
[3]7.1

How ligands are classified? Explain with suitable examples.

Concept: Coordination Compounds - Introduction
Chapter: [9] Coordination Compounds
[3]7.2

What is lanthanoid contraction?

Concept: F-block Elements - The Lanthanoids
Chapter: [8.02] F-block Elements

Explain, why lanthanum (Z = 57) forms La3+ ion, while cerium (Z = 58) forms Ce4+ ion?

Concept: F-block Elements - The Lanthanoids
Chapter: [8.02] F-block Elements
[3]7.3

What is the action of phenyl hydrazine on propanone?

Concept: Aldehydes and Ketones - Preparation of Aldehydes and Ketones
Chapter: [12.01] Aldehydes and Ketones

What is the action of Zn – Hg / conc. HCl on propanone?

Concept: Aldehydes and Ketones - Preparation of Aldehydes and Ketones
Chapter: [12.01] Aldehydes and Ketones

What is the action of Sodium bisulphite on propanone?

Concept: Aldehydes and Ketones - Preparation of Aldehydes and Ketones
Chapter: [12.01] Aldehydes and Ketones
[3]7.4

Define enzymes.

Concept: Enzymes
Chapter: [14.02] Proteins

How is peptide linkage formed?

Concept: Proteins - Peptide
Chapter: [14.02] Proteins
[7]8 | Answer any ONE of the following:
[7]8.1

How is nitroethane converted into ethylamine.

Concept: Ethers - Physical and Chemical Properties of ether
Chapter: [11.03] Ethers

How is nitroethane converted into N-ethylhydroxylamine

Concept: Ethers - Physical and Chemical Properties of ether
Chapter: [11.03] Ethers

How is nitroethane converted into acetic acid

Concept: Ethers - Physical and Chemical Properties of ether
Chapter: [11.03] Ethers

Write names and chemical formulae of monomers used in preparing Buna-N.

Concept: Types of Polymerisation Reactions - Rubber
Chapter: [15] Polymers

What is a soap ?

Concept: Cleansing Agents - Soaps
Chapter: [16.03] Cleansing Agents

How soap is prepared?

Concept: Cleansing Agents - Soaps
Chapter: [16.03] Cleansing Agents
[7]8.2

How will you prepare ethanol, propan-2-ol and 2-methylpropan-2-ol from Grignard’s reagent?

Concept: Alcohols - Methods of Preparation
Chapter: [11.01] Alcohols

Explain  Optical activity

Concept: Werner’S Theory of Coordination Compounds
Chapter: [9] Coordination Compounds

Explain optical activity of lactic acid

Concept: Werner’S Theory of Coordination Compounds
Chapter: [9] Coordination Compounds

Request Question Paper

If you dont find a question paper, kindly write to us





      View All Requests

Submit Question Paper

Help us maintain new question papers on Shaalaa.com, so we can continue to help students




only jpg, png and pdf files

Maharashtra State Board previous year question papers 12th Board Exam Chemistry with solutions 2016 - 2017

     Maharashtra State Board 12th Board Exam Chemistry question paper solution is key to score more marks in final exams. Students who have used our past year paper solution have significantly improved in speed and boosted their confidence to solve any question in the examination. Our Maharashtra State Board 12th Board Exam Chemistry question paper 2017 serve as a catalyst to prepare for your Chemistry board examination.
     Previous year Question paper for Maharashtra State Board 12th Board Exam Chemistry-2017 is solved by experts. Solved question papers gives you the chance to check yourself after your mock test.
     By referring the question paper Solutions for Chemistry, you can scale your preparation level and work on your weak areas. It will also help the candidates in developing the time-management skills. Practice makes perfect, and there is no better way to practice than to attempt previous year question paper solutions of Maharashtra State Board 12th Board Exam.

How Maharashtra State Board 12th Board Exam Question Paper solutions Help Students ?
• Question paper solutions for Chemistry will helps students to prepare for exam.
• Question paper with answer will boost students confidence in exam time and also give you an idea About the important questions and topics to be prepared for the board exam.
• For finding solution of question papers no need to refer so multiple sources like textbook or guides.
S
View in app×