91.  The metallic constituents of hard water are

a

  Magnesium, tin and iron

b

 Calcium, magnesium and iron

c

 Magnesium, Calcium and tin

d

 Iron, tin and calcium

Answer & Explanation
Answer : Option B

92.  Branch of science which deals with the study of skin of man

a

  Physiology

b

 Anatomy

c

 Biochemistry

d

 Dermetology

Answer & Explanation
Answer : Option D

93.  A device which converts AC into DC is known as -

a

  Amplifier

b

 Rectifier

c

 Stabiliser

d

 Transformer

Answer & Explanation
Answer : Option B

94.  What is laughing gas?

a

  Nitrous Oxide

b

 Sulphur dioxide

c

 Carbon monoxide

d

 Hydrogen peroxide

Answer & Explanation
Answer : Option A

95.  Botanical name of Soyabean is

a

  Lathyrus odratus

b

 Glycine max

c

 Pisum sativum

d

 Brassica nigra

Answer & Explanation
Answer : Option B

96.  Which type of fire extinguisher is used for petroleum fire?

a

  Terylene

b

 Nylon

c

 Rayon

d

 Orlon

Answer & Explanation
Answer : Option A

97.  What is the maximum limit of sound intensity in decibel units beyond which a human being cannot hear?

a

  90 decibel

b

 95 decibel

c

 80 decibel

d

 85 decibel

Answer & Explanation
Answer : Option D

98.  From which of the following endocrine glands is GTH secreted?

a

  Adrenal gland

b

 Pituitary gland

c

 Thyroid gland

d

 Islets of Langerhans in pancreas

Answer & Explanation
Answer : Option B

99.  Fat can be separated from milk in a cream separator because of:

a

  gravitational force

b

 cohesive force

c

 centripetal force

d

 none of these

Answer & Explanation
Answer : Option C

100.  Which of the following is in liquid form at room temperature?

a

  Sodium

b

 Lithium

c

 Francium

d

 Cerium

Answer & Explanation
Answer : Option C

101.  Which one of the following is not an element of Noble gases?

a

  Xenon

b

 Hydrogen

c

 Helium

d

 Neon

Answer & Explanation
Answer : Option B

102.  Bacteria was discovered first by

a

  Leeuwenhook

b

 Robert hook

c

 Louis pasteur

d

 Robert Koch

Answer & Explanation
Answer : Option A

103.  In which type of rocks are metals like Gold and Copper mostly found?

a

  Old sedimentary

b

 Old igneous

c

 New metamorphic

d

 Old metamorphic

Answer & Explanation
Answer : Option B

104.  The animal which uses sounds as its 'eyes' is

a

  Blood

b

 Lungs

c

 Heart

d

 Kidney

Answer & Explanation
Answer : Option A

105.  Diamond is an allotropic form of

a

  silicon

b

 germanium

c

 carbon

d

 sulphur

Answer & Explanation
Answer : Option C

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