Science Quiz- II

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

2. Which of the following is a non metal that remains liquid at room temperature?

(a) Phosphorous   

(b) Bromine

(c) Chlorine         

(d) Helium

3. Chlorophyll is a naturally occurring ch elate compound in which central metal is

(a) Copper

(b) Calcium

(c) Iron     

(d) Magnesium

4. Which of the following is used in pencils?

(a) Graphite  

(b) Silicon

(c) Charcoal

(d) Phosphorous

 

5. Which of the following metals forms an amalgam with other metals?

(a) Tin 

(b) Zinc

(c) Lead

(d) Mercury

Science Quiz

1. H₂O is the chemical formula of
(a) Water
(b) Hydrogen 
(c) Nitrogen
(d) Ammonia
 

2. The nucleus of an atom consists of
(a) Neutrons 
(b) Protons and Neutrons
(c) Protons, Neutrons, and Electrons
(d) Electrons

3. Entomology is the scientific study of
(a) Internal organs
(b) Insects
(c) Trees
(d) Lichens

4.The third planet from the sun is
(a) Mercury
(b) Mars
(c) Earth
(d) Venus

5. The green pigment found in plants that performs photosynthesis is
(a) Melanin
(b) Chloroplast
(c) Chlorophyll
(d) Chromatophore