Below are the Top Chemistry MCQs for Test Preparation 2024:
Structure of Molecules MCQs:
1➤ Atoms react with each other because:
ⓑ They are short of electrons.
ⓒ They want to attain stability.
ⓓ They want to disperse.
2➤ An atom having six electrons in its valence shell will achieve noble gas electronic configuration by:
ⓑ Losing all electrons
ⓒ Gaining two electrons
ⓓ Losing two electrons
3➤ Considering the electronic configuration of atoms which atom with the given atomic number will be the most stable one?
ⓑ 8
ⓒ 10
ⓓ 12
4➤ Octet rule is:
ⓑ Picture of electronic configuration
ⓒ Pattern configuration of electronic
ⓓ Attaining of eight electrons
5➤ Transfer of electrons between atoms results in:
ⓑ Ionic bonding
ⓒ Covalent bonding
ⓓ Coordinate covalent bonding
6➤ When an electronegative element combines with electropositive element the type of bonding is:
ⓑ Ionic
ⓒ Polar covalent
ⓓ Coordinate covalent
7➤ A bond formed between two non metals is expected to be:
ⓑ Ionic
ⓒ Coordinate covalent
ⓓ Metallic
8➤ A bond pair in covalent molecules usually has:
ⓑ Two electrons
ⓒ Three electrons
ⓓ Four electrons
9➤ Which of the following compounds is not directional in its bonding?
ⓑ CH4 (MTN-G1-13)
ⓒ CO2
ⓓ H₂O
10➤ Ice floats on water because:
ⓑ Ice is crystalline in nature,
ⓒ Water is denser than ice
ⓓ Water molecules move randomly.
11➤ Covalent bond involves the :
ⓑ acceptance of electrons
ⓒ sharing of electrons
ⓓ repulsion of electrons
12➤ How many covalent bonds does C₂H₂ molecule have?
ⓑ 3
ⓒ 4
ⓓ 5
13➤ Triple covalent bond involves how many number of electrons?
ⓑ 5
ⓒ 4
ⓓ 8
14➤ Which pair of the molecules has same type of covalent bonds?
ⓑ O2 and N₂
ⓒ O2 and C2H4
ⓓ O2 and C2H2
15➤ Identify the compound which is not soluble in water:
ⓑ KBr
ⓒ NaCl
ⓓ MgCl2
16➤ Which one of the following is an electron deficient molecule?
ⓑ N2
ⓒ BF3
ⓓ O2
17➤ Identify which pair has polar covalent bonds:
ⓑ H₂O and N₂
ⓒ H₂O and C₂H₂
ⓓ H₂O and HCI
18➤ Which one of the following is the weakest force among the atoms?
ⓑ metallic force
ⓒ intermolecular force
ⓓ covalent force
19➤ Atoms form a chemical bond to achieve:
ⓑ Stability
ⓒ Affinity
ⓓ None
20➤ Mode of reaction of an atom depends upon its number of:
ⓑ Protons
ⓒ First shell electrons
ⓓ Neutrons
21➤ A force of attraction between atoms that holds them together in a molecule is called a:
ⓑ Ionic bond
ⓒ Coordinate covalent bond
ⓓ Chemical bond
22➤ The attaining of--------- electrons in the outermost shell is called duplet rule.
ⓑ 3
ⓒ 4
ⓓ 5
23➤ The attaining of eight electrons in the outermost shell is called:
ⓑ Couplet rule
ⓒ Triplet rule
ⓓ Octet rule
24➤ If attractive forces dominate, the system of the energy:
ⓑ Decreases
ⓒ Does not change
ⓓ Becomes zero
25➤ The electrons which are involved in chemical bonding are termed as:
ⓑ Transition electrons
ⓒ Bonding electrons
ⓓ All of these
26➤ The bond formed by the complete transfer of electrons from one atom to another is called:
ⓑ Covalent bond
ⓒ Coordinate covalent bond
ⓓ Metallic bond
27➤ The bond formed by mutual sharing of pairs of electrons is called:
ⓑ Covalent bond
ⓒ ordinate covalent bond
ⓓ Metallic bond
28➤ Which of the following molecules have single covalent bond?
ⓑ Methane
ⓒ Oxygen
ⓓ Ethene
29➤ Atoms achieve stability by attaining electronic configuration of:
ⓑ Inert gases
ⓒ Alkaline earth metals
ⓓ Coinage metals
30➤ How many valence shell electrons are there in group I elements?
ⓑ 2
ⓒ 3
ⓓ 4
0 Comments