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1 .When a gas is subjected to adiabatic expansion, it gets cooled due to-
A.
No chage in tntropy
B.
Loss in kinetic energy
C.
Decreases in velocity
D.
Energy spent in doing work-
Answer & Explanation
Answer
: Option
D
Explanation
:
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2 .The boiling point of water decreases at higher altitudes is due to
A.
Low temperature
B.
Low atmospheric pressure
C.
High temperature
D.
High atmospheric pressure
Answer & Explanation
Answer
: Option
B
Explanation
:
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3 .Global warming may result in-
A.
Flood
B.
cyclone
C.
Decrease in forest productivity
D.
all of the above
Answer & Explanation
Answer
: Option
D
Explanation
:
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4 .Which of the following is responsible for blue baby syndrome-
A.
Fluoride
B.
Nitrate
C.
Arsenic
D.
Lead
Answer & Explanation
Answer
: Option
B
Explanation
:
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5 .Vitamin B1 is known as-
A.
pyridoxine
B.
thiamine
C.
tocopheral
D.
riboflavin
Answer & Explanation
Answer
: Option
B
Explanation
:
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6 .Vitamin C is -
A.
ascorbic acid
B.
nicotinic acid
C.
citric acid
D.
tartaric acid
Answer & Explanation
Answer
: Option
A
Explanation
:
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7 .Power alcohol is -
A.
Absolute alcohol + Methyle alcohol
B.
Absoluted alcohol + Petrol
C.
Rectified alcohol + Petrol
D.
Denatured alcohol + Petrol
Answer & Explanation
Answer
: Option
B
Explanation
:
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8 .The chemical name of plaster of paris is-
A.
Calcium Chloride
B.
Calcium Nitrate
C.
Calcium Sulphate Hydrate
D.
None of these
Answer & Explanation
Answer
: Option
C
Explanation
:
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9 .Which of the most reactive metal?
A.
Sodium
B.
Calcium
C.
Iron
D.
Potassium
Answer & Explanation
Answer
: Option
D
Explanation
:
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10 .Alcoholic fermentation is brought about the action of -
A.
yeast
B.
CO2
C.
O2
D.
CO
Answer & Explanation
Answer
: Option
A
Explanation
:
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11 .Enzymses are -
A.
carbohydrates
B.
lipids
C.
proteins
D.
None of these
Answer & Explanation
Answer
: Option
C
Explanation
:
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12 .Smoke is a colloidal dispersion of a -
A.
Solid in a gas
B.
Liquid in a gas
C.
Gas in a solid
D.
Gas in a gas
Answer & Explanation
Answer
: Option
A
Explanation
:
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13 .Which one of the following contains cobalt?
A.
Chlorophyll
B.
Haemoglobin
C.
Vitamin C
D.
Vitamin B12
Answer & Explanation
Answer
: Option
D
Explanation
:
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14 .Which of the following gases is used in cigarette lighters?
A.
Butane
B.
Methane
C.
Propane
D.
Radon
Answer & Explanation
Answer
: Option
A
Explanation
:
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15 .Heavy water is used as a coolant in nuclear reactors Heavy water is
A.
Water rich in minerals
B.
Ozonized water
C.
Water containing minerals of heavy metal
D.
Water containg heavy isotope of hydrogen
Answer & Explanation
Answer
: Option
D
Explanation
:
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