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 Chemistry Questions

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Q:

Which molecule is used up in photosynthesis?

A) Water B) Carbohydrates
C) Oxgen D) Sugar
 
Answer & Explanation Answer: A) Water

Explanation:

The first step in photosynthesis is to split the water molecule using sun light.

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Q:

Which among the following compounds has the strongest hydrogen bond?

A) HI B) HCl
C) HF D) HBr
 
Answer & Explanation Answer: C) HF

Explanation:
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Q:

Plastic bottles are made of a polymer called PET. The expanded form of PET is

A) Polyethylene terephthalate B) Polyethyl terelene
C) Polyethylene triphosphate D) Polyethyl tetrachloride
 
Answer & Explanation Answer: A) Polyethylene terephthalate

Explanation:
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Q:

Chemical name of vinegar is

A) Onam B) Pongal
C) Bihu D) Hornbill
 
Answer & Explanation Answer: B) Pongal

Explanation:
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Q:

Which of the following is the best fire-extinguisher?

A) Water B) Oxygen
C) Carbon-dioxide D) Soil
 
Answer & Explanation Answer: C) Carbon-dioxide

Explanation:
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Q:

........... is not a sub atomic particle of an atom.

A) Neutron B) Electron
C) Xenon D) Proton
 
Answer & Explanation Answer: C) Xenon

Explanation:
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Q:

The residual attractive or repulsive forces between molecules or atomic groups that do not arise from a covalent bond, or ionic bonds is called _____

A) Neutral Bond B) Non Polar Bond
C) Electro Valence bond D) Van der Walls bond
 
Answer & Explanation Answer: D) Van der Walls bond

Explanation:
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Q:

Which one of the following statements regarding histone proteins is correct?

A) Histones are proteins that are present in mitochondrial membrane B) Histones are proteins that are present in nucleus in association with DNA
C) Histones are proteins associated with lipids in the cytosol D) Histones are proteins associated with carbohydrates in the cytosol
 
Answer & Explanation Answer: B) Histones are proteins that are present in nucleus in association with DNA

Explanation:

Histones are highly alkaline proteins found in eukaryotic cell nucleusthat package and order the DNA into structural units called nucleosomes. They are the chief protein components of chromatin, acting as spools around which DNA winds, and playrole in gene regulation.

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