EASY
UPSC CAPF AC Paper - I
IMPORTANT
Earn 100

When hard water is evaporated completely, the white solid remains in the container. It may be due to the presence of 
1. Carbonates of Ca and Mg
2. Sulphates of Ca and Mg
3. Chlorides of Ca and Mg
Select the correct answer using the code given below :

50% studentsanswered this correctly

Important Questions on Chemistry

EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 40
Consider the following statements
1. Hardness of water depends upon its soap consuming power.
2. Temporary hardness is due to bicarbonates of magnesium and calcium.
3. Permanent hardness of water is due to sulphate and/or chloride of calcium and magnesium.
4. Permanent hardness can be removed by boiling.
Which of the statements given above are correct?
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 41
Vinegar is the trade name of
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 42
Select the incorrect statement regarding potash alum
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 43
Match List I with List II and select the correct answer using the codes given below the lists.
         List I                                   List II
       (Acid)                                (Source)
A. Lactic acid                        1 Tamarind
B. Tartaric acid                      2 Orange
C. Oxalic acid                       3 Tomato
D. Citric acid                          4 Sour curd
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 44
Which chemical was an important symbol in our struggle for freedom?
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 45
What is the purpose of adding baking soda to the dough?
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 46
The pH of fresh milk is 6. When it turns sour, the pH
HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Biology>Exercise 5>Q 89
Enzyme and protein can be correlated with each other in the following ways:
1. All proteins are enzymes.
2. All enzymes are proteins.
3. All enzymes are not proteins.
4. All proteins are not enzymes.  
Which of the statements given above are correct?