General Science Class 9 MCQS

In group electron affinity values decreases from top to bottom because:

1. Atomic size normal
2. Atomic size increases
3. Atomic size decreases
4. Atomic size same

All Transition Elements are :

1. Gases
2. Metals
3. Nonmetals
4. Metalloids

An example of ionic compound is :

1. H
2. CH
3. N
4. NaCl

Interaction between highly electron deficient hydrogen and highly electronegative atom is called?

1. Covalent bond
2. Ionic bond
3. Hydrogen bond
4. Metallic bond

Two fluorine atoms share one electron each in their outermost shell to achieve electronic configuration of :

1. Xe
2. Ar
3. Kr
4. Ne

At room temperature most of ionic compounds are :

1. Amorphous solids
2. Crystalline solids
3. Liquids
4. Gases

Number of electrons lost by atoms of group IIIA equals :

1. 1
2. 2
3. 3
4. 4

Atom which loses two electrons from its outer shell to form ion is called?

1. Oxygen
2. Potassium
3. Magnesium
4. Carbon

In NaCl crystal lattice each Na ion is surrounded by:

1. 6 Cl^- ions
2. 6 Na^+ ions
3. 8 Cl^- ions
4. 12 Cl^- ions

Tendency of atoms to acquire eight electrons in their valence shell is :

1. Octet rule
2. Duplet rule
3. Triplet rule
4. None of above