WorksheetsChemistry Regent - Jan 2015 Q41-50
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Which two compounds are electrolytes?
a)
KOH and CH3COOH
b)
KOH and C5H12
c)
CH3OH and CH3COOH
d)
CH3OH and C5H12
2.
Which statement explains why a CO2 molecule is nonpolar?
a)
Carbon and oxygen are both nonmetals.
b)
Carbon and oxygen have different electronegativities.
c)
The molecule has a symmetrical distribution of charge.
d)
The molecule has an asymmetrical distribution of charge.
3.
Which temperature change indicates an increase in the average kinetic energy of the molecules in a sample?
a)
15°C to 298 K
b)
37°C to 273 K
c)
305 K to 0°C
d)
355 K to 25°C
4.
Which substance at STP can be represented by this particle diagram?
a)
N2
b)
H2
c)
Mg
d)
Kr
5.
Which type of equilibrium exists in a sealed flask containing Br2(ℓ) and Br2(g) at 298 K and 1.0 atm?
a)
static phase equilibrium
b)
static solution equilibrium
c)
dynamic phase equilibrium
d)
dynamic solution equilibrium
6.
What are the products when potassium hydroxide reacts with hydrochloric acid?
a)
KH(s), Cl+(aq), and OH-(aq)
b)
K(s), Cl2(g), and H2O(ℓ)
c)
KCl(aq) and H2O(ℓ)
d)
KOH(aq) and Cl2(g)
7.
In a titration, 20.0 milliliters of a 0.150 M NaOH(aq) solution exactly neutralizes 24.0 milliliters of an HCl(aq) solution. What is the concentration of the HCl(aq) solution?
a)
0.125 M
b)
0.180 M
c)
0.250 M
d)
0.360 M
8.
What fraction of a Sr-90 sample remains unchanged after 87.3 years?
a)
1/2
b)
1/3
c)
1/4
d)
1/8
9.
Which potential energy diagram represents the change in potential energy that occurs when a catalyst is added to a chemical reaction?
a)
1
b)
2
c)
3
d)
4
10.
Which balanced equation represents a spontaneous radioactive decay?
a)
1
b)
2
c)
3
d)
4
100 %
