Which one of the metal is liquid at normal temperature-

a) zinc

b) mercury

c) sodium

d) water

Note: There is an email link embedded within this post, please visit this post to email it. ]]>Protective sols are –

a) lyophilic

b) lyophobic

c) both a and b

d ) none

Note: There is an email link embedded within this post, please visit this post to email it. ]]>Which one of following elements is found in free state in nature –

a) sodium

b) iron

c) zinc

d) gold

Note: There is an email link embedded within this post, please visit this post to email it. ]]>The least distance of distinct vision for a young adult with normal vision is about

a) 25 m

b) 2.5 cm

c) 25 cm

d) 2.5 m

Note: There is an email link embedded within this post, please visit this post to email it. ]]>The far point of a myopic person is 80 cm in front of the eye . What is the nature and power of the lens required to correct the problem ?

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The change in focal length of an eye lens is caused by the action of

A) Retina

B) Iris

C) Pupil

D) Ciliary muscles

Note: There is an email link embedded within this post, please visit this post to email it. ]]>The human eye forms the image of an object at its

a) C0rnea b) iris c) pupil d) Retina

Note: There is an email link embedded within this post, please visit this post to email it. ]]>A dice is rolled twice . What is the probability of getting a sum equal to 9?

a) 2/9 b) 2/3 c) 1/3 d) 1/9

Note: There is an email link embedded within this post, please visit this post to email it. ]]>A box contains 20 balls out of which 12 are red and 8 are green . 5 balls are randomly drawn from the box with replacement . What is the probability that at most 3 balls are green in colour ?

A) 253/3125

B) 423/625

C) 272/3125

D) None

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