Chemistry
Previous year question paper with solutions for Chemistry May-2016
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Question paper 1
SECTION- A
Q1 (A) Fill in the blanks
i. Dimensional formula of pressure is ……………………
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ii. Cations are the ……………….charged ions.
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iii. The shape of s-orbital is…………………
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iv. Sigma bond is …………………..than pi bond.
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v. Positively charged ions are called………………….
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vi. Bond length is measured in …………………. Unit
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vii. Negatively charged ion are called …………………
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viii. The functional group of ketone is………………
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(B) State true or false
i. Vertical columns are called periods
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ii. Molecule of C2H2 is linear
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iii. Blood is a buffer solution.
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iv. Isotopes have same number of protons.
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v. Gunpowder is a mixture.
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vi. Silver nitrate is a non electrolyte.
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vii. All orbitals have directional characteristics.
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Q.2. Attempt any TEN questions.
i. Define sigma (σ) and pi (π ) bonding .
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ii. Diffrentiate between an orbit and an orbital?
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iii. What are the essentials of chemical equation?
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iv. Write the short comings of bohrs model of an atom?
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v. Define boyles law and charles law?
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vi. What are the causes and disadvantages of boiles corrosion?
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vii. Explain working of primary cell?
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viii. Explain functional group?
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ix. Explain strong and weak electrolyte?
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x. Give advantages of long form of the periodic table?
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xi. Calculate the number of atoms in 23gm of Na ? (at.mass of Na=23)
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xii. Explain ionic bond. Give example?
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xiii. Explain periods and groups briefly
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SECTION- C
Q.3 Attempt any THREE questions.
1. a) Name and explain the quantum numbers.
b) Explain the process of electroplating?
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2. a) Explain molarity ,normality and molality.
b) Write a short note on aufbau principle and hund’s rule
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3. a) Diffrentiate between alkene and alkyne .
b) Diffrentiate between s and p orbital.
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4. a) Write the formula of the following compound.
i. Acetic acid ii. Acetaldehyde iii. Acetone iv. Ethene v. Ethyne
b) Calculate the pH value of 0.01 HCL?
c) What are the causes of hardness of water?
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5. a) Define a co –ordinate bond. Explain it taking at least 2 examples?
b) Describe sp, sp2 , sp3 hybridisation.
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Question paper 2
SECTION A
Q. 1 Fill in the blanks
a. Important ore of iron is_____________.
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b. Sulphide ores are concentrated by ______________process.
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c. The process of depositing Zinc on iron is called___________
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d. Producer gas is a mixture of CO & _____________.
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e. Percentage of fixed carbon can be determined by ___________ analysis.
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f. A good lubricant should have ________flash point.
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g. In a paint, gypsum is used as__________
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h. Fire clay bricks are ________ in nature.
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i. Polythene is a ____ polymer.
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j. Carbon monoxide is ___________ toxic than CO2
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Q.2 State True or False
a. Percentage of carbon is more in wrought iron than steel.
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b. Solder is an example of ferrous alloy.
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c. Graphite is an example of natural refractory.
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d. Rubber is a natural polymer.
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e. The intensity of noise is measured in decibel.
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SECTION B
Q.2 Attempt any SIX questions:
(i) Explain Froth floatation process for the concentration of sulphide ore.
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(ii) Define the terms gangue, flux, slag, ore and mineral.
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(iii) What are the factors which influence the rate of corrosion?
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(iv) What is water gas? Give its composition and uses.
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(v) Define greases. Give applications of greases.
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(vi) What are the characteristics of a good paint?
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(vii) Differentiate between thermoplastics and thermosetting plastics.
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(viii)Explain addition and condensation polymers.
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(ix) What is air pollution? Give the sources of water pollution.
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SECTION C
Q. 3 Attempt any FIVE questions:
(i) What is an alloy? Describe the composition and uses of German silver and Nichrome.
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(ii) Write a short note on metal cladding and metal spraying.
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(iii) Describe classification of fuel.
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(iv) Define oiliness, saponification value, volatility, emulsification, cloud point and pour point.
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(v) What are refractories? Give characteristics of a good refractory material.
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(vi) Give the preparation and uses of Natural rubber and PVC.
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(vii) Describe primary and secondary pollutants, biodegradable and non Biodegradable pollutants.
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(viii) Explain coal gas and Biogas.
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