Solved Exercise Class 9th Chemistry Chapter 04

Class 9th Chapter 04 solved exercise Mcq's and short questions

class 9th chemistry chapter 4 solved exercise

Class 9th Chapter 04 solved exercise Long question answers

Must read::-Class 9th chemistry chapter 02

 

1. Which pair has polar covalent bond?

A) O2 and Cl2
B) H2O and HCl
C) H2O and N2
D) H2O and C2H2

ANSWER= (B) H2O and HCl

 

2. The types of chemical bonds are?

A) 1
B) 2
C) 3
D) 4

ANSWER= (D) 4

 

3. Which type of bond is present in NaCl?

A) Coordinate Covalent
B) Covalent
C) Metallic
D) Ionic

ANSWER= (D) Ionic

 

4. Bond formation between ion is due to ?

A) electron sharing
B) intermolecular forces
C) electrostatic forces
D) repulsive

ANSWER= (C) electrostatic forces

 

5. ionic character of bond becomes dominant over covalent character if electronegativity difference is ?

A) greater than 1.7
B) less than 1.7
C) equal to 1.7
D) equal to zero

ANSWER= (A) greater than 1.7

 

6. The difference of electronegativity between two elements if more than 1.7 the bond will be ?

A) Covalent
B) Ionic
C) Metallic
D) Coordinate covalent

ANSWER= (B) Ionic

 

7. The transfer of electron between atoms results in ?

A) Covalent bonding
B) Ionic bonding
C) Metallic bonding
D) Coordinate covalent

ANSWER= (B) Ionic bonding

 

8. Which molecule has triple Covalent bond ?

A) O2
B) C2H4
C) N2
D) NH3

ANSWER= (C) N2

 

9. Which type of bond is present in C2H4 molecule ?

A) single Covalent
B) dounle covalent
C) triple covalent
D) none

ANSWER= (B) double covalent bond

 

10. How many triple covalent bonds in C2H2 ?

A) 2
B) 1
C) 3
D) 0

ANSWER= (B) 1

 

11. How many electrons take part in triple covalent bonds in C2H2 ?

A) 2
B) 4
C) 6
D) 8

ANSWER= (C) 6

 

12. Bond formed in CH4 is ?

A) Single
B) Double
C) Triple
D) Metallic

ANSWER= (A) Single

 

13. The total number of sharing electrons in N2 gas is ?

A) 2
B) 4
C) 6
D) 8

ANSWER= (C) 6

 

14. The bond formed due to mutual sharing of electrons is called?

A) Metallic
B) Ionic
C) Covalent
D) Coordinate

ANSWER= (C) Covalent

 

15. Which type of bond is present in H-F molecule?

A) Metallic
B) Ionic
C) polar Covalent
D) Coordinate

ANSWER= (C) Polar Covalent

 

16. A bond pair in Covalent bond usually has?

A) one electron
B) two electrons
C) Three electrons
D) four electrons

ANSWER= (B) Two electrons

 

17. Covalent bond involves the?

A) donation of electron
B) acceptance of electron
C) sharing of electron
D) none

ANSWER= (C) sharing of electron

 

18. The formation of Ammonium ion is due to?

A) Ionic bond
B) Covalent bond
C) ionic bond
D) coordinate covalent bond

ANSWER= (D) coordinate covalent bond

 

19. The electron deficient molecule is ?

A) NH3
B) BF3
C) N2
D) O2

ANSWER= (B) BF3

 

20. Dative bond is fromed between ammonia and boron trifluoride the acceptor atom is ?

A) Fluorine
B) Boron
C) Hydrogen
D) Nitrogen

ANSWER= (B) Boron

 

21. Which molecule needs two electrons to complete its octet ?

A) N2
B) O2
C) NH3
D) BF3

ANSWER= (D) BF3

 

22. The atom which donates electron pair in dative covalent bond is ?

A) acceptor
B) donor
C) ionuc bond
D) electronegative

ANSWER= (B) donor

 

23. The compound which is non directional in bonding is ?

A) CH4
B) KBr
C) CO2
D) H2O

ANSWER= (B) KBr

 

24. Which one of following is polar molecule ?

A) CH4
B) KBr
C) Cl2
D) H2O

ANSWER= (D) H2O

 

25. identify the compound which is not soluble in water ?

A) C6H6
B) KBr
C) NaCl
D) MgCl2

ANSWER= (A) C6H6

 

26. A bond formed between two non metal atoms excepted to be ?

A) Metallic bonding
B) ionic
C) Covalent
D) Coordinate covalent

ANSWER= (C) Covalent

 

27. which one is polar ?

A) O2
B) Cl2
C) HCl
D) H2

ANSWER= (C) HCl

 

28. The bond formed metals due to mobile electrons ?

A) metallic
B) ionic
C) covalent
D) coordinate

ANSWER= (A) metallic

 

29. Which one of the following is the weakest force among the atoms ?

A) metallic force
B) ionic force
C) intermolecular force
D) Covalent force

ANSWER= (C) intermolecular force

 

30. Which compound has hydrogrn bonding ?

A) CH4
B) Cl2
C) H2
D) H2O

ANSWER= (D) H2O

 

31. The density of water in gram per cubic centimeter ?

A) 1.00
B) 1.08
C) 0.108
D) none

ANSWER= (A) 1.00

 

32. Ice floats on water because ?

A) ice is denser than water
B) ice is crystalline
C) water is denser than ice
D) none

ANSWER= (C) water is denser than ice

 

33. IH-bonding has ?

A) intermolecular force
B) ionic force
C) covalent force
D) none

ANSWER= (a) intermolecular force

 

34. Cl has---- electrons in its outer shell ?

A) 3
B) 4
C) 7
D) 8

ANSWER= (D) 7

 

35. Carbon family has electronic configuration ?

A) ns2np2
B) ns2np1
C) ns2np3
D) none

ANSWER= (A) ns2np2