Chemistry Questions

Q:

Acute diabets  patients smell of 

A) acetone B) ether
C) ethyl alcohol D) methyl alcohol
 
Answer & Explanation Answer: A) acetone

Explanation:

Acute diabetes results in the formation of acetone in the body. Hence such patients smell of acetone.

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Q:

Which gas is used for the preparation of Soda water?

A) Carbon Dioxide B) Oxygen
C) Hydrogen D) Ammonia
 
Answer & Explanation Answer: A) Carbon Dioxide

Explanation:
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Q:

Atoms Are Composed Of

A) Electrons and Protons B) Protons and Nuclei
C) Only Electrons D) Electrons and Nuclei
 
Answer & Explanation Answer: D) Electrons and Nuclei

Explanation:

Atoms are composed of Electrons, protons and Neutrons. Protons and Neutrons together called as Nuclei.

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Q:

Another name for the activated complex is

A) Transmission state B) Energy barrier
C) Collision group D) Transition state
 
Answer & Explanation Answer: D) Transition state

Explanation:

The minimum amount of energy required for a particular reactants to convert into products and is called as Activation Energy.

 

Another_name_for_the_activated_complex_is1559538681.jpg image

 

This activation complex is also termed as Transition State because according to Transition State Theory at transition state the existing bonds tend to increase in length and become weaken while, the new forming bonds tend to decrease in length and start becoming stronger.

Hence, the activated complex is in transition between reactants and products.

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Q:

In the thermite process, the reducing agent is

A) Chlorine B) Aluminium
C) Silicon D) Iron
 
Answer & Explanation Answer: B) Aluminium

Explanation:

In the thermite process, the reducing agent is Aluminium.

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Q:

Lime is sometimes applied to soil in order to

A) increase the acidity of the soil B) make the soil more porous
C) restore nitrates to the soil D) increase the alkalinity of the soil
 
Answer & Explanation Answer: D) increase the alkalinity of the soil

Explanation:

Lime is sometimes applied to soil in order to increase the acidity of the soil.

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Q:

Oxidation number of S8?

A) +1 B) -2
C) +2 D) 0
 
Answer & Explanation Answer: D) 0

Explanation:

S8 is an elemental form of sufur. In elemental form it can't be reduced or oxidized. Hence, it oxidation number is zero and thus sulfur is zerovalent here.

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Q:

Carbon disulfide is prepared by heating sulfur and charcoal.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Yes, Carbon disulfide is prepared by heating sulfur and charcoal. 


S2 + C ----> CS2

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