1.
Brass gets discoloured in air because of the presence of
which of the following gases in air?
A. Oxygen
B. Hydrogen
sulphide
C. Carbon
dioxide
D. Nitrogen
Answer: Option B
2.
Which of the following is a non metal that remains liquid at
room temperature?
A. Phosphorous
B. Bromine
C. Chlorine
D. Helium
Answer: Option B
3.
Chlorophyll is a naturally occurring chelate compound in
which central metal is
A. copper
B. magnesium
C. iron
D. calcium
Answer: Option B
4.
Which of the following is used in pencils?
A. Graphite
B. Silicon
C. Charcoal
D. Phosphorous
Answer: Option A
5.
Which of the following metals forms an amalgam with other
metals?
A. Tin
B. Mercury
C. Lead
D. Zinc
Answer: Option B
Brass gets discoloured in air because of the presence of
which of the following gases in air?
A. Oxygen
B. Hydrogen
sulphide
C. Carbon
dioxide
D. Nitrogen
Answer: Option B
2.
Which of the following is a non metal that remains liquid at
room temperature?
A. Phosphorous
B. Bromine
C. Chlorine
D. Helium
Answer: Option B
3.
Chlorophyll is a naturally occurring chelate compound in
which central metal is
A. copper
B. magnesium
C. iron
D. calcium
Answer: Option B
4.
Which of the following is used in pencils?
A. Graphite
B. Silicon
C. Charcoal
D. Phosphorous
Answer: Option A
5.
Which of the following metals forms an amalgam with other
metals?
A. Tin
B. Mercury
C. Lead
D. Zinc
Answer: Option B
source: indiabix
source: indiabix
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