Q.1:- The atmospheric layer reflecting radio waves is called ?
- Ozonosphere
- Ionosphere
- Stratosphere
- Mesosphere
Q.2:- A fountain pen works on the principle of ?
- Flow of liquids from higher to lower potential
- Capillary action
- Bernoulli’s Principle
- Viscosity of liquids
Q.3:- Which one of the following animals can hear Ultrasonic Sound ?
- Rat
- Squirrel
- Cat
- Bat
Q.4:- Lamberts law is related to ?
- Reflection
- Refraction
- Interference
- Illumination
Q.5:- A body absorbs heat most if it is ?
- Black and rough
- Black and smooth
- White and rough
- White and smooth
Q.6:- Decibel is a term connected with ?
- Air
- Water
- Sound
- Soil
Q.7:- Tear gas used by the police to disperse the mob contains ?
- Carbon Dioxide
- Chlorine
- Ammonia
- Hydrogen Sulphide
Q.8:- Why do birds not have respiratory trouble at the time of flying at high altitude ?
- Their lungs are very large
- They fly inactively
- They have extra air sacs
- They use less Oxygen
Q.9:- Which type of mirror is used in the head lights of vehicles ?
- Plane mirror
- Concave mirror
- Convex mirror
- Parabolic mirror
Q.10:- Convex mirrors are used as a rear view mirror in motor cycles because ?
- It forms real image
- It forms erect (upright) image
- It forms smaller image as compared with object
- All of the above
Q.11:- Water drops cannot stick to the oily surface due to ?
- Lack of adhesive force
- Surface tension
- Cannot mix each other
- Water is lighter than oil
Q.12:- Which electromagnetic radiation is used for satellite communication ?
- Ultraviolet
- Infrared
- Microwave
- Millimeter Wave
Q.13:- For which of the following substances, the resistance decreases with increase in temperature ?
- Pure Silicon
- Copper
- Nichrome
- Platinum
Q.14:- A liquid disturbed by stirring comes to rest due to ?
- Density
- Surface Tension
- Viscosity
- Centripetal Force
Q.15:- Steel is more elastic than rubber because it ?
- Requires larger deforming force
- Is never deformed
- Is deformed very easily
- Is harder than rubber
Q.16:- Outside of cooking utensils are generally left black from below because ?
- It is difficult to clean daily
- Black surface is a good conductor of heat
- Black surface is a poor conductor of heat
- Black surface is a good absorber of heat
Q.17:- Instrument used to study the behaviour of a vibrating string is ?
- Barometer
- Hydrometer
- Hygrometer
- Sonometer
Q.18:- Ohm’s law is valid in case of ?
- Semiconductor
- Conductor
- Superconductor
- Insulator
Q.19:- Magnetic keepers are used to protect magnets from ?
- Earth’s magnetic field
- Effect of other magnets
- Self-demagnetization
- Demagnetization due to heating
Q.20:- Super conductors are substances that ?
- Offer minimum resistance to flow of electric current
- Conduct electricity at low temperature
- Conduct electricity at high temperature
- Offer high resistance to the flow of electric current
Q.21:- Which of the following is the second largest source of global energy ?
- Fossil fuel
- Nuclear Energy
- Renewable Energy
- None of these
Q.22:- In which region of electromagnetic spectrum does the Lyman series of Hydrogen atom lie ?
- Visible
- Infrared
- Ultraviolet
- X-Rays
Q.23:- When a ship enters the sea from a river what will be the effect ?
- It lowers
- It sways
- It rises a little
- It jolts
Q.24:- Which of the following is indicated by the colour of a star ?
- Weight
- Distance
- Temperature
- Size
Q.25:- ‘Parsec’ is the unit of measurement of ?
- Density of stars
- Astronomical distance
- Brightness of heavenly bodies
- Orbital velocity of giant stars
