6
Q:

What are long chains of Carbon Molecules called

A) Ribosomes B) Hydrocarbons
C) Polymers D) None

Answer:   C) Polymers



Explanation:

A small organic molecule (sugars or amino acids), several of which may be bonded together to form a chain called a polymer.

Subject: Chemistry
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Q:

Which of the following statements about the reaction below are INCORRECT?

2Pb + C  2Pb + CO2


A. Carbon di-oxide is getting, oxidised
B. Lead is getting reduced
C. Carbon is oxidised
D. Lead oxide is getting reduced

A) A and C B) A and B
C) B and C D) A, B and C
 
Answer & Explanation Answer: B) A and B

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0 3
Q:

A solution contains 33 g of common salt in 320 g of water. Calculate the concentration in terms of mass, by mass percentage of the solution.

A) 13.05% B) 9.09 g
C) 9.35g D)  9.35%
 
Answer & Explanation Answer: D)  9.35%

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0 2
Q:

............ element is represented by the given symbol.

A) Hydrogen B) Mercury
C) Carbon D) Gold
 
Answer & Explanation Answer: B) Mercury

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0 5
Q:

Calculate the relative molecular mass of water H2O?

A) 18u B) 1.8u
C) 2.0u D) 20u
 
Answer & Explanation Answer: A) 18u

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0 4
Q:

Potassium Permanganate is used for purifying drinking water, because________

A) It is a reducing agent B) It is an oxidising agent
C) It is a sterilising agent D) It dissolves the impurities of water
 
Answer & Explanation Answer: B) It is an oxidising agent

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Q:

Which is the only non-metal placed at the left side of the Modern Periodic Table?

A) Hydrogen B) Carbon
C) Neon D) Helium
 
Answer & Explanation Answer: A) Hydrogen

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0 16
Q:

There are ............ metalloids in the modern periodic table.

A) 5 B) 4
C) 7 D) 6
 
Answer & Explanation Answer: D) 6

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0 8
Q:

In which of the following MgCl2 is soluble?

A) Petrol B) Acetone
C) Kerosene D) Water
 
Answer & Explanation Answer: D) Water

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