Q:

Natural Rubber is a Polymer of

A) butadiene	B) 2methyl-1,3butadiene
C) ethylene	D) isoprene

Answer & Explanation Answer: D) isoprene

Explanation:

Natural Rubber is a Polymer derived from Isoprene.

rubber-bands-503028_6401547100511.jpg image

Natural rubber is an addition polymer that is obtained as a milky white fluid known as Latex from a Tropical Rubber Tree.

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Q:

Burning Magnesium ribbon produces white ash, which dissolves in water to form____.

A) Magnesium Halides	B) Magnesium Oxide
C) Magnesium Hydroxide	D) Magnesium Sulphate

Answer & Explanation Answer: C) Magnesium Hydroxide

Explanation:

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Q:

Which of the following is not purely output device?

A) Printer	B) Speaker
C) Plotter	D) Screen

Answer & Explanation Answer: D) Screen

Explanation:

A touch screen is the only device which works as both an input and an output device among the given options. You view the options available to you on the screen (output) and you then use your finger to touch the option that you have chosen (input).

Hence, Screen is not purely output device.

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Q:

A boy raises a box with a weight of 120N through a height of 2 m. The work done by him is

A) 60 J	B) 120 J
C) 240 J	D) 180 J

Answer & Explanation Answer: C) 240 J

Explanation:

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Q:

The "Loktak" lake is located in which state of India?

A) Meghalaya	B) Manipur
C) Mizoram	D) Tripura

Answer & Explanation Answer: B) Manipur

Explanation:

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Q:

Plants of which group are predominantly aquatic?

A) Thallophyta	B) Bryophyta
C) Pteridophyta	D) No option is correct

Answer & Explanation Answer: A) Thallophyta

Explanation:

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Q:

In Angiosperms, plant embryos in seed have structures called ______.

A) Spore	B) Buds
C) Sprout	D) Cotyledon

Answer & Explanation Answer: D) Cotyledon

Explanation:

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Q:

The number indicating the intensity of an earthquake on a Richter scale range between

A) 1 to 7	B) 1 to 9
C) 1 to 8	D) 1 to 12

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