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Chemistry MCQs Quiz For Entry Test Uni Chemist
1. The decrease in radius is larger for:
Divalent ions
Trivalent ions (Answer)
Atoms
Monovalent ions
2. The force which holds together two or more atoms or ions to form a large variety of compounds is called:
A covalent bond
An ionic bond
A chemical bond (Answer)
A coordinate bond
3. The theory of chemical bonding has been a major problem of:
Modern Physics
Mechanics
Modern Biology
Modern Chemistry (Answer)
4. The tendency of atoms to attain a maximum of eight electrons in the valance shell is known as:
Octet rule (Answer)
Traid rule
Duplet rule
Tetrad rule
5. The dipole moment of water is:
8.0 D
1.08 D
1.84 D (Answer)
1.94 D
6. The covalent radius of Cl atom is:
99.4 pm (Answer)
176.7 pm
76 pm
38 pm
7. In the chemical combination of sodium and hydrogen to form NaH:
Sodium atom gains an electron
Hydrogen atom gains an electron (Answer)
Both the atoms share the electron
None of above
8. The triatomic molecule with zero dipole moment has shape:
Trigonal plannar (Answer)
Tetrahedral
Angular
Linear
9. Chemical reactivity of elements depends upon their characteristics:
Shape
Sizes
Electronic configurations (Answer)
Colour
10. Elements combine together due to inherent tendency to stabilize themselves by:
Sharing electrons
Losing electron
Gaining electrons
All of above (Answer)
11. Which of the following elements is not stable?
Ar
Li (Answer)
Kr
Xe
12. The amount of energy required to break one mole of a bond to separate atom is called:
Bond energy (Answer)
Ionization potential
Electron affinity
Electrnegativity
13. The dipole moment of orthochlorobenzene is:
1.70 D
2.5 D (Answer)
2.70 D
1.5 D
14. Dipole moment is defined as:
Charge x Distance (Answer)
Charge x Displacement
Bond energy x Charge
Charge x Debye
15. Which of he following is a noble gas:
Cl2
Ne (Answer)
N2
H3
