SEA IX SCIENCE

Write your full name in capital letters.

Write your Admission number. (e.g. JS----)

Write your class and section (e.g. IXA)

Dry ice is -

• water in solid state

• water in gaseous state

• CO₂ in liquid state

• CO₂ in solid state

The physical state of water that remains at DC

• solid

• liquid

• both solid and liquid

• gas

Which of the following cannot be considered a form of matter?

• Atom

• Water vapour

• Smell

• Electron

Which of the following mixtures can be separated by the given process?

 

• Iodine and camphor

• Ammonium chloride and common salt

• Naphthalene and iodine

         

• Ammonium chloride and camphor

Which of the following statement is correct?

• Materials existing as liquids at room temperature have their melting and  boiling points lower than that of room temperature.
  

• The phenomenon  involving the transition of a substance from solid to liquid state is called sublimation.

• To convert a temperature on the Celsius scale to Kelvin scale, subtract 273 from the given temperature
  

• The density of ice is less than that of water.

 Which of the following statement is not true regarding the characteristic of matter?

• Particles of a matter are randomly moving in all directions.
  

• Kinetic energy of the particles increases with a rise in temperature
  

• Kinetic energy of the particles of all maters remains the same at a particular temperature.

• Particles of matter diffuse into each other on their own.

When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

• Absorbs some heat    

• Releases some heat
  

• Neither absorbs nor releases heat
  

• Absorbs exactly 3.34 x 10⁵J/kg of heat