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Q:

In which of the following, functional group isomerism is not possible?

 

A) Alcohols B) Aldehydes
C) Alkyl halides D) Cyanides
 
Answer & Explanation Answer: C) Alkyl halides

Explanation:

The haloalkanes (also known as halogenoalkanes or alkyl halides) are a group of chemical compounds derived from alkanes containing one or more halogens.Halogens can’t form more than one bond in the context of common organic compounds and can’t form multiple bonds to carbon.

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1 49296
Q:

Which of the following pairs is INCORRECT?

I. Haematite : Iron

II. Pitchblende : Copper

III. Monazite : Thorium

A) Only I B) Only II
C) Only I and Only II D) Only I and Only III
 
Answer & Explanation Answer: B) Only II

Explanation:
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Q:

Which group in the modern periodic table contains elements that are inert gases? 

 

A) Group 16    B) Group 18 
C) Group 17  D) Group 15
 
Answer & Explanation Answer: B) Group 18 

Explanation:
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1 48817
Q:

Consider the following constituent gases of the atmosphere :

1. Argon

2. Neon

3. Helium

4.Ceirbon dioxide

Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage?

A) 1-3-2-4 B) 1-4-2-3
C) 4-2-3-1 D) 2-4-1-3
 
Answer & Explanation Answer: B) 1-4-2-3

Explanation:
Composition of Dry Air (Substance, % by volume)
Nitrogen, N2 78.08
Oxygen, O2
20.95
Argon, Ar 0.93
Carbon dioxide, CO2 0.033
Neon, Ne 0.0018
Helium, He 0.00052
Methane, CH4 0.0002
Krypton, Kr 0.00011
Dinitrogen oxide, N2O 0.00005
Hydrogen, H2 0.00005
Ozone, O3 0.000001
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0 48807
Q:

Isobars are atoms of different chemical elements that have ______.

 

A) Same atomic number but different mass number B) Same mass number but different atomic number
C) Same mass number and same atomic number D) Different mass number and different atomic number  
 
Answer & Explanation Answer: B) Same mass number but different atomic number

Explanation:
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0 48661
Q:

Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?

 

A) Addition reaction B) Substition reaction
C) Combustion reaction D) Decomposition reaction
 
Answer & Explanation Answer: C) Combustion reaction

Explanation:
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0 48646
Q:

Which among the following statements are TRUE regarding synthetic fibre?

 

I. They melt after catching fire.

II. They are more durable.

III. They are prepared by a number of processes using petrochemicals.

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

Explanation:
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Q:

The movement of water molecules through the plasma membrane is called ______.

 

A) Osmosis B) Sedimentation
C) Precipitation D) Transpiration
 
Answer & Explanation Answer: A) Osmosis

Explanation:
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