W3.CSS
All things which occupy space and have weight are called:
The ------------------- energy of the particles of solids is not great enough.
In gases, the binding force between particles is:
The smallest particle, of water retains its properties is called ----------— of water.
A molecule of a compound is formed of two or more than two:
The smallest indivisible particle of matter is called:
Atoms are made up of protons, neutrons and:
The sum of protons and neutrons in the nucleus of an atom is called its:
Molecular mass
Molecular weight
Atomic mass
Atomic number
The number of protons in an atom is called its:
Molecular number
Atomic mass
Molecular mass
Atomic number
Atomic number of Hydrogen is:
Atomic number of Helium is:
The change in which new substances are formed is called a:
Physical change
Chemical change
Permanent change
New change
In a molecule, the atoms of elements are always present in a ---------------
The space around the nucleus is called the ----------------nuclear space of the atom.
Molecules are male up of:
The chemical change of rust is -------------
Iron hydride
Iron, supplied
Three protons
Four protons
On heating, the kinetic energy of molecules:
Remains constant
May Increase or decrease
Three of the following substances are alike in an important way Select the one that is different,
Water is being heated from 300C to 600C. During this process, the average Kinetic energy of the molecules of water:
Is increasing
is decreasing
Steam is being cooled into water. The inter-molecular attractions between the molecules of the water:
May be higher or lower than those in steam
Are lower than those in steam
Are equal to those in steam
Are higher than those in steam
The atoms of elements combined in a fixed proportion is a:
The formation of ice-cream involves:
Physical change
Chemical change
Both A and B
None of these
Burning is a ---------- process, during burning new substances are formed.
In a ------------------- none of the component retains its original properties.
A molecule of sugar, for example, glucose, is formed of atoms of Hydrogen, Oxygen and:
-------------------------- is a pure substance that cannot be broken down into simpler substances by ordinary chemical processes.
Calcium Oxide + Water ---------------
Calcium
Calcium Hydroxide
Hydride
Oxygen and Hydrogen
