1. The high reactivity of fluorine is due to ?
A.small size of fluorine atom
B.its high electro negativity
C.availability of d-orbitals
D.strong F - F bond
2. The main chemical constituent of clay is ?
A.aluminium silicate
B.zeolites
C.aluminium borosilicate
D.silicon oxide
3. Which element found in all organic compounds ?
A.carbon
B.nitrogen
C.calcium
D.none of them
4. Alloys made with mercury as one metal are called ?
A.mixtures
B.emulsions
C.solders
D.amalgams
5. All noble gases are ?
A.colourless
B.colour
C.colourless and odourless
D.colourless and but have odour
6. What is the hardest form of carbon ?
A.coke
B.graphite
C.charcoal
D.diamond
7. What is hottest part of the gas flame is called ?
A.blue zone
B.luminous zone
C.dark zone
D.non-luminous zone
8. Atomic number of an element gives
A.the number of nucleons in its atom
B.the number of electrons in its atom
C.the weight of the atom of the element
D.the total number of elementary particles in its atom
9. Faraday's Law is associated with
A.Reaction of gases
B.Pressure of gases
C.Electrolysis
D.Temperature and pressure
10. Enzymes are
A.Fatty acids
B.Carbohydrates
C.Nucleic acids
D.Proteins
ANSWER :
1 - (B)
2 - (C)
3 - (A)
4 - (D)
5 - (C)
6 - (D)
7 - (D)
8 - (B)
9 - (C)
10- (D)
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