___________ is used on stage to produce the effect of clouds.
Carbondioxide gas
Solid carbon dioxide
Liquid ammonia
Liquid Oxygen
A generalized trend of observation made on a system is called
Hypothesis
Theory
Law
Concept
------------ is the mixture of several gases.
Air
Carbon dioxide
Fuel
Nitrogen.
_____________ is produced from respiration by animals and human beings, burning of fuels etc.
Nitrogen
Oxygen
Noble gases
The air we breathe in is called _______________ air.
Liquidated
Exhaled
Inhaled
Gaseous
Percentage by volume of oxygen in air is
78.1%
20.1%
0.03%
0.93%
____________ showed that air mainly consists of oxygen and nitrogen gases.
Antoine Lavoisier
Daniel Rutherford
Joseph Priestley
Coral scheel
________ is a chemical based product.
Super conductors
Energy
Matter
The air we breathe out is called ____________ air.
Liquefied
____________ is used in aerated drinks.
Hydrogen
Sulphur dioxide
