X Class Physical Science Short Important Questions

X Class –Physics (Very Very Important Questions)

Unit-1- Measurement of length

Short

What is meant by positive and negative zero error of a screw gauge? How are these determined?
What is principle of vernier?
Mention the uses of vernier calipers?
Mention the principle of screw gauge?
Describe the vernier calipers with a diagram and explain how you measure the diameter of a cylinder?

Unit-II- Our Universe.

Short

The weight of an object at an equator is not same at the poles Why?
Differentiate between mass and weight of a body?
State hook’s Law.
State universal law of gravitation. Calculate the gravitational force acting on 10kg mass. take g=9.8m/s.
The weight of the body is not the same on the surface of the earth at the poles. Specify the reason.

Unit-III-Kinematics.

Short

Define time of flight?
A body projected vertically upwards with a velocity 20m/s.Find the maximum height reached by the body.
A ball is thrown up and attains a maximum height of 80m. Find its initial speed.

Unit-IV-Dynamics

Short

What is angular velocity of the earth about its axis? Take 1 day = 24 hours.
Find the length of a simple pendulum whose time period is 1.8 sec.(given g=9.8m/s)
What is principle of launching a satellite into an orbit?
Give examples of oscillatory motion.
What is the necessity of banking of roads?

Unit-V-Electro Magnetic Spectrum

Short.

Give reasons for the depletion of Ozone layer?
What are the uses of Hard X-rays?
Define radiography?


Unit-VI- Sound.

Define resonance.
Write the differences between Node and antinodes.
Give the examples for oscillatory motion?
In a resonating air column experiment with a close-end-tube, first resonance occurs when the length of the air column is 10cm. Find out the length of the air column for the occurrence of second resonance.

Unit-VII-Light.

Short

What are the important processes in producing a laser?
What are the uses of laser in Medicine?

Unit-VIII-Magnetism

Short

Define magnetic susceptibility.
Define Permeability
State inverse square law of magnetism.
Define magnetic moment.
What are the ferromagnetic substances? Give examples.
Differentiate between Para and Dia magnetic substances?

Unit-IX-Electricity.

Short

What is transformer? What is its rule?
Write the difference between galvanometer, Ammeter.
Derive Ohm’s Law.
State Fleming’s right hand rule?
The resistance of maganin wire of 15 cross sectional area is 1mm2.find the resistance of manganin wire of same length but of cross section of 3mm2.
What are Ohmic and non-Ohmic conductors? give examples. The p.d.across a bulb is 240V when a current of 3 amperes flows through it. Find the resistance of bulb.
What is the total e.m.f? when three cells of voltages 1V,1.V and 2V are connected in series?
Calculate the equalent resistance of two resistors 100 and 1 connected in parallel.
Define Lenz’s law? Explain it?
Draw the electric circuit and level its parts?
Define faraday’s law of electrolysis.
Calculate the equivalent resistance of two resistors of 6 ohms and 4 ohms in parallel.

Unit-X-Modern Physics

Short

Mention the differences between the atomic number and mass number.
Define isotope? Give examples.
Define isobar? Give examples.
Define isotones? Give examples.
Explain nuclear fusion with an example.
Mention the differences between natural and artificial radioactivity.
What are the uses of moderator?ina nuclear reactor?
What is binding energy?
Mention the application of radioisotope in industry?
What is meant by stationary orbit?
State the law of radioactive series?
What is a artificial transmutation? Example?
Write about b- decay with examples

Unit-XI-Electronics.

Short

Define doping?
Define hole current and electric current?
Define byte?

X Class – Chemistry Important Questions

Unit-I- Atomic Structure

Short

What is the relation between Ionization energy and Atomic Size?
Write down the electronic configuration of(a) Magnesium, (b) Chromium, (c) Phosphorus , (d) Copper, (e) Zinc, (f) Calcium
What is Nodal plane?
What is Pauli’s exclusion principle?
Define Ionization Potential.
Define electron affinity.
What is meant by stationary orbit?
Distinguish between orbit and orbital?
Explain why electron enters into 4s orbital but not 3d after filling 3p orbital?

Unit-II- Chemical Bond

Short

Name the two molecules having pyramidal shape.

Unit-III-Classification Of Elements

Short

On what property of atom, does the medeleef’s periodic law is based.
How the atomic size changes in a period and a group? Why?
Why does atomic size decreases from left to right in a period?
Which group of elements in a periodic table can be used as reducing agents?
How does the ionization energy vary in a period and in a group?

Unit-IV- Alkaline Earth Metals

Short

NaCl and KCl are added during extraction of Magnesium from MgCl2. Why?
How many water molecules are present in Epsom Salt?

Diagrams

Draw a neat diagram of Extraction of Magnesium from its ore Label its parts.

Unit-V- Solutions

Short

Define mole fraction?
Give one example for each of polar and non-polar solvents.
Calculate the number of moles of NaOH present in 750 ml of 0.4M solutions.
2,12 grams of Na2CO3 is present in 500ml of its solution. Calculate the molarity of the solution. Molecular weight of Na2Co3 is 106.
The weight percentage of NaCl solution is 10. If the weight of solution is 150 grams, calculate the weight of NaCl.
Calculate the amount of NaOH is 250 ml of 0.5m solution of NaOH. Molecular weight of NaOH is 40.
15ml of Hexane is mixed with 45ml of Heptane calculate the volume percentage of this solution.
10 grams of sodium carbonate is present in 120 grams of its aqueous solution. Calculate the weight percentage.

Unit-VI- Acids And Basis

Short

What do you mean by “Strong Acid” ?
What do you mean by “Strong Base” ?
What do you mean by “Weak Acid” ?
What do you mean by “Weak Base” ?
Define heat of neutralization? Give its value for reaction between a strong acid and strong base?
Ionic product of water?
Explain pH.scale.
Write short note on structure of acids and bases?
Distinguish between H= and [H+].
Calculate pH of 0.002M Hcl.
Write two chemical properties of acids with two equations.
Calculate the pH of 0.001mHCl.

Unit-VII- Chemistry Of Carbon Compounds

Short

What is an Allotropy?
What is Catenation?
Explain the substitution reactions of alkanes?
Why does diamond acts as a bad conductor of electricity?
State the differences between Alkanes and Alkenes?


Unit-VIII- Carbohydrates

Short

How is Benedict’s reagent prepared?
What is sulphitation?
How do you perform (a) Toll en’s test and (b) Benedict’s test for detecting sugar?

Unit-IX- Oils And Fats

Short

What is saphonification?
What is a soap?
What is Detergent?
Why do saving soaps give slow drying lather?
What is hydrogenation of Oils?
Give the differences between soaps and detergents?
Mention four industrial uses of oils?

Unit-X- Chemistry And Industry

Short

What are micro fertilizers? Write its uses?
Mention the names of any two chromophares.
What are adhesives?
What arte amino acids? Give example.
What is polymerization?
What is Annealing?