Which of the following is the correct IUPAC name?

1. 3-Ethyl-4,4-dimethylheptane

2. 4,4-Dimethyl-3-ethylheptane

3. 5-Ethyl-4,4-dimethylheptane

4. 4,4-Bis(methyl)-3-ethylheptane

The IUPAC name for  is

1. 1-Hydroxypentane-1,4-dione

2. 1,4-Dioxopentanol

3. 1-Carboxybutan-3-one

4. 4-Oxopentanoic acid

The IUPAC name of the given compound is-

1. 1-Chloro-2-nitro-4-methylbenzene

2.  1-Chloro-4-methyl-2-nitrobenzene

3. 2-Chloro-1-nitro-5-methylbenezene

4.  m-Nitro-p-chlorotoluene

 The correct IUPAC name for  is _____.

1. 2-Ethyl-3-methylpentane

2. 3,4-Dimethylhexane

3. 2-sec-Butylbutane

4. 2,3-Dimethylbutane