ICSE.X. CHEMISTRY. 2. CHEMICAL BONDING

Law of duplet states that elements having:

• two electrons in valence shell are stable

• two electrons in K-shell are stable

• two electrons in L-shell are stable

• two electrons in M-shell are stable

Which of the following element is having two electrons in its valence shell and is stable?

• Calcium

• Magnesium

• Beryllium

• Helium

The modern concept of chemical combination is:

• the chemical combination leads to decrease in energy

• the chemical combination leads to increase in energy

• the chemical combination leads to decrease in mass

• the chemical combination leads to increase in mass

An attractive force which holds the constituent atoms together in a molecule is:

• electrostatic force

• magnetic force

• chemical bond

• inert gas stable force

All elements try to attain the state of:

• maximum reactivity and maximum stability

• minimum reactivity and minimum stability

• maximum reactivity and minimum stability

• minimum reactivity and maximum stability

The bond formed between metals and non-metals are:

• ionic

• covalent

• coordinate

• none of these

An ion formed by the gain of electrons is known as:

• cation

• anion

• electrostatic ions

• none of these

The bond formed by the transfer of electrons from one atom to another is known as:

• Ionic bond

• Covalent bond

• Coordinate bond

• Donative bond

Another name of dative bond is:

• Ionic bond

• Covalent bond

• Coordinate bond

• Donative bond

The bond formed by sharing of electrons is known as:

• Ionic bond

• Covalent bond

• Coordinate bond

• Shared bond