Chemistry 11 Chapter 4 Liquids and Solids Test 15

Chemistry 11 Chapter 4
Liquids and Solids
Test 15

1. DNA has ____ spiral chains?

a) 4
b) 3
c) 1
d) 2

2. Oxygen has ____ lone pairs?

a) 1
b) 2
c) 4
d) 3

3. X-ray analysis has shown that on the average there are ____ amino acids units for each turn of the helix?

a) 26
b) 24
c) 27
d) 25

4. Which acid has low acidic strength?

a) HCl
b) HF
c) HI
d) HBr

5. Glucose, fructose and sucrose has _____ groups in them which are responsible for hydrogen bonding?

a) -C=H
b) -NH
c) -OH
d) CH₃

6. The electrostatic force of attraction between a highly electronegative atom and partial positively charged hydrogen atom is called?

a) Ion-Dipole Forces
b) Dipole-Dipole Forces
c) Dipole-induced dipole forces
d) Hydrogen bonding

7. Methane has lowest boiling point due to?

a) Both
b) Small molecule
c) Least polarizability
d) None of these

8. Soaps and detergents form cleansing action because the polar part of their molecules are water soluble due to?

a) Dipole-Dipole Forces
b) Hydrogen bonding
c) Dipole-induced dipole forces
d) Ion-Dipole Forces

9. The strength of hydrogen bonding is generally _____ times less than of covalent bond?

a) 20
b) 30
c) 40
d) 10

10. Ammonia can form only____ hydrogen bond due to one lone pair on it?a) 1
b) 3
c) 4
d) 2

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