1. . The word atom is derived from a Greek word:
(A) Atomos
(B) Basic
(C) Demos
(D) Particle
2. . The mass of electron is ____ times of the mass of proton:
(A) 1/1834
(B) 1/1840
(C) 1/1838
(D) 1/1836
3. . All the particles present in the nucleus are called:
(A) Neutron
(B) Hypron
(C) Nucleon
(D) Anti-nucleon
4. . The proton was discovered by:
(A) Goldstein
(B) J.J. Thomson
(C) Dalton
(D) Chadwick
5. . Which subshell is spherical in shape:
(A) d
(B) p
(C) s
(D) f
6. . The region around the nucleus where probability of finding electrons is maximum is called:
(A) Orbital
(B) Band
(C) Axis
(D) Radius
7. . The maximum number of electrons in ‘p’ orbital is:
(A) 2
(B) 10
(C) 6
(D) 14
8. . The maximum number of electrons in ‘d’ orbital is:
(A) 10
(B) 6
(C) 2
(D) 14
9. . The value of electronegativity of fluorine is:
(A) 1
(B) 4
(C) 3
(D) 2
10. . The bond formed by transfer of electron between atoms is called:
(A) Ionic bond
(B) Covalent bond
(C) Polar bond
(D) Sigma bond
11. . The bond formed by mutual sharing of electrons between atoms is called:
(A) Covalent bond
(B) Ionic bond
(C) Polar bond
(D) Sigma bond
12. . Shared electron pair is given by one atom only in ______ bond:
(A) Ionic
(B) Covalent
(C) Polar
(D) Co-ordinate covalent
13. . Point out the compound having ionic bond:
(A) KCl
(B) H₂O
(C) CO₂
(D) HCl
14. . Electronegativity difference > 1.7, the bond is:
(A) Co-ordinate covalent
(B) Covalent
(C) Polar
(D) Ionic
15. . In nitrogen molecule, the number of pi bonds is:
(A) 1
(B) 3
(C) 2
(D) 4
16. . The parallel overlapping of orbitals takes place in:
(A) Polar bond
(B) Sigma bond
(C) Pi bond
(D) Non-polar bond
17. . The atom that gives an electron pair in coordinate covalent bond is called:
(A) Pi
(B) Recipient
(C) Sigma
(D) Donor
18. . The atom that takes an electron pair in coordinate covalent bond is called:
(A) Donor
(B) Pi
(C) Sigma
(D) Accepter
19. . Point out the molecule having polar bond:
(A) CH₄
(B) CO₂
(C) H₂O
(D) NaCl
20. . In ______ bond, the shared electron pair is attracted unequally:
(A) Non-polar covalent
(B) Polar covalent
(C) Sigma
(D) Ionic