Advertisements
Advertisements
Question
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Advertisements
Solution
Mercury, iron, diamond, nitrogen, graphite, hydrogen, oxygen, and chlorine are elements because these cannot be split further into two or more simpler substances.
APPEARS IN
RELATED QUESTIONS
Define the following term of Matter .
State two characteristics of matter demonstrated by Brownian motion.
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :
Name the property which allows metals to be hammered into thin sheets.
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
State two physical properties on the basis of which metals can be distinguished from non-metals.
Give reason why copper metal is used for making electric wires.
Which of the following are compounds ?
- CO
- No
- NO
- Co
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
What difference in the properties of oil and water enable their separation by a separating funnel ?
Fill in the following blanks with suitable words :
Immiscible liquids are separated by using a .....................
One of the following does not undergo sublimation. This one is :
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Evaporation is always accompanied by ______ in temperature.
Give an example of liquid in gas.
Define the term matter.
