A. Plastic
B. Glass
C. Rubber
D. None of the above
A. 12% alcohol
B. 90% alcohol
C. 95% alcohol
D. 100% alcohol
A. molecules become more disordered.
B. K.E of the molecules decreases
C. intermolecular forces become weaker.
D. molecules move more frequently.
A. 20cm3/min
B. 40cm3/min
C. 160cm3/min
D. 2.5cm3/min
A. a solvent
B. an anti freezing agent
C. a substitute for petrol
D. for denaturing of ethyl alcohol
A. pressure
B. volume
C. moles
D. density
A. 5
B. 4
C. 3
D. 2
A. neutrons
B. protons and electrons
C. protons
D. protons and neutrons
A. Combustion method
B. Dumas method
C. Kjeldahls method
D. All of the above methods are for different purposes