HARD
UPSC CAPF AC Paper - I
IMPORTANT
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Suppose you have four test tubes labelled as 'A', 'B', 'C', and 'D'. ·A' contains plain water, 'B' contains solution of an alkali, 'C' contains solution of an acid, and 'D' contains solution of sodium chloride. Which one of these solutions will turn phenolphthalein solution pink?

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Important Questions on Chemistry

EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 38
The indicator used in the titration of a strong acid and a strong basis
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 39
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 :
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?
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 13>Q 41
Vinegar is the trade name of
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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?
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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?