Chapter 7: Environmental Chemistry II Water Chemistry Mcqs for High School - Grade 10 - Set 2

1)   Temporary hardness of water is caused due to the presence of dissolved

a. calcium hydrogen carbonates only
b. magnesium hydrogen carbonates only
c. Sulphates and chlorides of calcium or magnesium
d. calcium hydrogen carbonates and magnesium hydrogen carbonates
Answer  Explanation 

ANSWER: calcium hydrogen carbonates and magnesium hydrogen carbonates

Explanation:
No explanation is available for this question!


2)   Which of the following is an intestinal disease caused by bacteria such as E.coli?

a. cholera
b. dysentery
c. jaundice
d. hepatitis
Answer  Explanation 

ANSWER: cholera

Explanation:
No explanation is available for this question!


3)   The hardness that can be removed by boiling is called

a. temporary hardness
b. permanent hardness
c. semi temporary hardness
d. semi permanent hardness
Answer  Explanation 

ANSWER: temporary hardness

Explanation:
No explanation is available for this question!


4)   What is the percentage of groundwater?

a. 0
b. 0.002
c. 0.006
d. 0.021
Answer  Explanation 

ANSWER: 0.006

Explanation:
No explanation is available for this question!


5)   Which type of Hepatitis spreads through polluted water?

a. hepatitis A only
b. hepatitis B only
c. hepatitis C
d. hepatitis A and B
Answer  Explanation 

ANSWER: hepatitis A and B

Explanation:
No explanation is available for this question!


6)   Which of the following is the most abundant salt in seawater?

a. magnesium chloride
b. calcium chloride
c. sodium chloride
d. sodium nitrate
Answer  Explanation 

ANSWER: sodium chloride

Explanation:
No explanation is available for this question!


7)   Which of the following is a disease in which excess of bile from the liver enters the blood and causes yellowness of skin and eyes?

a. cholera
b. dysentery
c. jaundice
d. hepatitis
Answer  Explanation 

ANSWER: jaundice

Explanation:
No explanation is available for this question!


8)   Property due to which water acts as a universal solvent is its

a. polarity only
b. ability to make hydrogen bond only
c. strong dipole dipole interaction
d. polarity and ability to make hydrogen bond
Answer  Explanation 

ANSWER: polarity and ability to make hydrogen bond

Explanation:
No explanation is available for this question!


9)   What is the first step of raw water treatment?

a. sedimentation
b. coagulation
c. filtration
d. chlorination
Answer  Explanation 

ANSWER: sedimentation

Explanation:
No explanation is available for this question!


10)   The fourth step of sewage water treatment is called

a. primary sewage treatment
b. secondary sewage treatment
c. activated sludge treatment
d. chlorination
Answer  Explanation 

ANSWER: chlorination

Explanation:
No explanation is available for this question!