HARD
UPSC CAPF AC Paper - I
IMPORTANT
Earn 100

Consider the following statements

1. Silver articles become black after sometime when exposed to air because they reacts with sulphur in the air to form a coating of silver sulphide.

2. Copper reacts with moist carbon dioxide in the air and loses its shiny brown surface and gains a green coat of copper carbonate.

3. Iron when exposed to moist air for a long time acquires a coating of a brown flaky substance called rust.

Which of the statements given above are correct?

50% studentsanswered this correctly

Important Questions on Chemistry

HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 91
Solvay process converts which of the following into soda ash?
HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 93
The first metal used by man was?
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 94
Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?
HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 95
Match List- I with List-II and select the correct answer from the codes given below:
        List-I                      List-II
A. Diamond               1. Calcium
B. Marble                  2. Silicon
C. Sand                    3. Aluminium
D. Ruby                    4. Carbon
EASY
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 96
Monazite is an ore of _____.
HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 97
Iron sheet kept in moist air covered with rust. Rust is
HARD
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 98
Glass is attacked by which of the following?
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 10 - Chemistry>Exercise 10>Q 99
'German silver' is used to make decorative articles, coinage metal, ornaments etc.The name is given because