1 .
Which of the following gas doesn't pollute the air:
A.  $CO_2$
B.  CO
C.  $NO_2$
D.  $SO_2$
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2 .
Which of the following enzymes is found in saliva:
A.  Renin
B.  tyline
C.  tenin
D.  resin
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3 .
The amount of blood in the healthy human body is:
A.  10% of the weight of the human body
B.  25% of the weight of the human body
C.  7% of the weight of the human body
D.  5% of the weight of the human body
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4 .
Which of the following is not a radioactive element?
A.  Astetin
B.  Franscium
C.  Titenium
D.  Zcronium
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5 .
The Oxidation state of oxygen in OF is
A.  +2
B.  -2
C.  +1
D.  -1
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6 .
Tear gas is
A.  Ammonia
B.  Chlorine
C.  Hydrogen chloride
D.  Hydrogen sulphide
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7 .
The gas emerged through the cigarette lighter is:
A.  Butane
B.  methane
C.  propane
D.  redon
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8 .
Which of the following is utilized in the dry cleaning?
A.  Benzene
B.  nitrobenzene
C.  chlorobenzene
D.  hydroxic Benzene
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9 .
Full form of RDX is
A.  Recently Developed Explosive
B.  Research Developed Explosive
C.  Really Descent Explosive
D.  Rectified Developed Explosive
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10 .
If the water kept in any bottle which is completely filled up is freezee then the bottle will crack because:
A.  Water expands on freezing
B.  Bottle contracts on the freezing point of ice
C.  The external temperature of the bottle is more than the internal temperature
D.  Water contracts on freezing
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