Question

1. The equilibrium distance between the nuclei of two bonded atoms in a molecule [ ]

a) Bond length b) Bond energy c) Bond angled) Bond dissociation energy

2. The bond energy of the triple bond, when compared to double bond, is [ ]

a) Half b) Same c) Less d) More

3. The bond length of Alkanes, when compared to Alkenes, is [ ]

a) Less b) More c) Same d) Half

4. H – O – H bond angle in water is [ ]

a) 109° 28| b) 120° c) 180° d) 104.5°

5. 1A° = ____ pico metre [ ]

a) 102 b) 103 c) 10–2 d) 10–3

6. The bond dissociation energy of H – H in kJ/mole is [ ]

a) 242.7 b) 431 c) 498 d) 427

7. Among ethane, ethene, and ethyne the C – C bond energy is [ ]

a) Same in all three compounds b) Greater in ethyne c) Greater in ethene d) Greater in ethane

8. Which is an incorrect statement? [ ]

a) Bond length is measured in A° unity b) Bond angle is expressed in degree

c) Bond angle is expressed in kJ/mole d) None of these

9. The carbon compound with a bond angle 180° is [ ]

a) CH4 b) C2H2 c) C2H4 d) C2H6

10. Bond distance 140 pico metre is _____ for [ ]

a) C – C b) C – N c) C – O d) C = C

Answer 1

Explanation:

Answer:

1. {A- Bond Length}

2. {d- more}

3.{b-more}

4.{a -109 28}

5.{a-102}

6.{d- 427}

7.{d-greater in ethane}

8.{c-Bond angle is expressed in kJ/mole}

9.{a-ch4}

10.{a- c-c}

Answer 2

1. The equilibrium distance between the nuclei of two bonded atoms in a molecule is  known as Bond Length.

2. The bond energy of the triple bond, when compared to double bond, is More.

3. The bond length of Alkanes, when compared to Alkenes, is More.

4. H – O – H bond angle in water is 109° 28|

5. 1A° = 102 pico-meters.

6. The bond dissociation energy of H – H in kJ/mole is 427.

7. Among ethane, ethene, and Ethyne the C – C bond energy is Greater in Ethyne.

8. Which is an incorrect statement?

c) Bond angle is expressed in kJ/mole

9. The carbon compound with a bond angle 180° is CH4.

10. Bond distance 140 pico-meter is for C – C.

Solution:

• The distance between 2 adjacent atoms in a molecule is known as Bond length. It is a measure able length.

• The bond energy in a triple bond is more than that of double bond because of the bond strength and the intermolecular forces.
• The bond length of alkanes with comparing to the alkenes is more because as the bond between the atoms becomes more strong they are tightly held together so it is not easy to break that bond.
• The bond angle in H-O-H is 109° 28|.

• 1A° = 102 pico-meters.

• The energy which is required to break a bond is known as dissociation energy. And for H-H bond it is 427

• Among ethane, ethene, and Ethyne the C – C bond energy is Greater in ethyne. because of the triple bond present in it.
• Bond energy is expressed in KJ/mole
• CH4 molecule has a bond angle of 180 degree.
• For C-C the bond distance is 140 picometers.

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