X Class Physical Science Long Important Questions

X Class –Physics (Very Very Important Questions)

Unit-1- Measurement of length

Long

How do you determine the diameter of wire using a screw gauge?

Unit-II- Our Universe.

Long

Explain the theory of Newton’s Universal Gravitational force attraction?
Describe the relation between acceleration due to gravity, and universal gravitational constant?

Unit-III-Kinematics.

Unit-IV-Dynamics

Long

Compare the centripetal and centrifugal forces.
Explain the applications of centrifugal forces(or) Describe the working principle of a centrifugal or Landry drier.
Describe an experiment to determine the acceleration due to gravity by simple pendulum.
Derive the formula for the banking angle tanq = v2/rg

Unit-V-Electro Magnetic Spectrum

Unit-VI- Sound.

Long

What is resonance? Give examples?
Explain the method of determining velocity of sound in air?
Write the difference between progressive and stationary waves.


Unit-VII-Light.


Long

Compare the Newton’s corpuscular theory of light and Huygen’s wave theory of light?
Describe the ripple tank. Explain how it is useful in understanding the reflection and refraction of light.
Explain the phenomenon of reflection applying wave theory of light .
Describe the diffraction of light.
How do you distinguish laser light from ordinary light in terms of the property of coherence?
What are the important applications of laser light in science and Technology?
Describe the diffraction of light waves at an aperture with a diagram.

Unit-VIII-Magnetism

Long

What are the key concepts of Ewing’s molecular theory?
Explain the types of magnetic substance?
Compare magnetic susceptibility and relative permeability of Para, dia and ferromagnetic substances?
Explain the Para, dia, Ferro magnetic substances. Give examples to each.

Unit-IX-Electricity.

Long

Describe an experiment to verify ohm’s law?
Show that the reciprocal of effective resistance due to resistances connected in parallel equal to the sum of reciprocals of the individual resistances.
Derive the equation Q=_____ or Derive the Joule’s Law.
Describe an experiment to verify Faraday’s II Law. Mention two applications.
Derive the relation V1/V2=i2/i1 in the transformer.
A house is fitted with 10 lamps of each 60 watt. If each lamp burns 5 hours a day, find the cost of consumption in a month of 30 days at the rate of Rs2.40 per unit.
Show the effective resistance of a series combination in a circuit is equal to sum of the individual resistances.

Unit-X-Modern Physics

Long.

Explain the mass defect in an atom 9or) calculate the mass defect in the formation of Helium nucleus.
Calculate the mass defect and the binding energy of = 15.995amu.
What is nuclear reactor? Explain how it works?
The mass defect. when helium nucleus is formed is 0.0303 amu.Calculate the binding energy.
Describe the Rutherford gold foil experiment with a diagram mention its important features.
What is the basic principle on which a nuclear reactor functions and how the chain reaction is controlled?
Compare the properties of a , b , g radiations.

Unit-XI-Electronics.

Long

How important is a computer in modern day life?
Distinguish between a machine language and high-level language?
Draw the block diagram of computer. Describe the functions of each component?
Explain briefly various stages of radio communication with diagram?
Explain briefly various stages of IV communication with diagram?
Explain the following (a) Extrinsic semi-conductor (b) Doping (c) Transistor (d) Energy band.
State the properties and uses of junction transistor.
How do you classify the solids electrically?
What is a Transistor? Describe two types of transistors with the help of a diagram.

X Class – Chemistry Important Questions

Unit-I- Atomic Structure

Long

Write the postulates of Boar’s Atomic model.
State the hund’s rule and explain with an example?
Define the ionization energy. Mention the factors that influence it?
Write the important features of Ruther ford’s planetary model and its defects.

Unit-II- Chemical Bond

Long
Explain how sigma and pi bonds are formed.
How is double bond formed? Explain with an example?
Explain the formation of co-ordinate covalent bond with an example?
Explain the formation of triple bond with an example?
Explain with a diagram the bond formation in Hydrogen Chloride and Nitrogen Molecule?


Unit-III-Classification Of Elements

Long

Explain how do the following changes in a period and group? (a). Electro negative character (b) Electro Positive character. (c) . Oxidizing property (d). Reducing Property.

Unit-IV- Alkaline Earth Metals

Long

Write the reactions of (a) Oxygen (b) Hydrogen and Chlorine with Group II A element.

Unit-V- Solutions

Long

Calculate the number of moles of oxalic acid present in 400ml of 0.025 M Oxalic acid solution.
4 grams of NaOH (mal wet=40) is dissolved in 16.2 grams of water (Mol.wt=18) Calculate the mole fraction of NaOH and Water.
How do you prepare a 0.1M standard Na2CO3 solution?

Unit-VI- Acids And Basis

Long

Write the Arrhenius theory of acids and bases and the defects of theory.
Write short notes on (a) pH (b) Structure of Acids and Bases.
Write short notes on (a) Limitations of Arrhenius theory of acids and bases. (b) Heat of Neutralization.

Unit-VII- Chemistry Of Carbon Compounds

Long

Write the Chemical Equation for the addition reactions of alkenes with H2 and Cl2.
Compare the structures of Diamond and Graphite?
What are Alkenes? Write the substitution and combustion reactions of Alkenes?


Unit-VIII- Carbohydrates

Long

Explain the manufacture of sugar from sugarcane with a diagram.
Define proteins write about the classification of proteins?
How is glucose tested with (a) Toll en’s reagent (b) Benedicts reagent?
What are protenes? How does a pepeptide bond formed? Mention the important functions of protens?
What are the proteins? Write about the classification of proteins?

Unit-IX- Oils And Fats

Long

How is quality of soap tested or give the qualitative test for soap with equation?
What are detergents? Explain the stages of preparation of detergents?

Unit-X- Chemistry And Industry

Long

What are drugs? Give the characteristics of ideal drug?
Write a short note on (a) Synthetic adhesives-uses. (b). Pottery and earth ware.
Describe briefly cold cream and face power mentioning their ingredients?
What is a drug? How are they classified as per, therapeutic action?
Describe different types of fertilizers? Explain the role of fertilizers in providing nutrients to the soil?
What is fractination? Describe about petroleum factination and mention principle products obtained in Fractination of petroleum.