Which one of these is not true for benzene?
1. It forms only one type of monosubstituted product
2. There are three carbon-carbon single bonds and three carbon-carbon double bonds
3. The heat of hydrogenation of benzene is less than its theoretical value
4. The bond angle between carbon-carbon bonds is 120°

 51%
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The IUPAC name of acrylaldehyde is:
1.  prop-2-en-1-al
2.  propenylaldehyde
3.  but-2-en-1-al
4.  propenal

 57%
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The structures  represents:
1.  Chain isomerism
2.  Position isomerism
3.  Chain as well as position isomerism
4.  Functional isomerism

 53%
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Petrol for aviation purpose must contain:
1.  Straight chain hydrocarbons
2.  Aromatic hydrocarbons
3.  Olefinic hydrocarbons
4.  Highly branched chain paraffins

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The solubility product of Hg2I2 is equal to:

 

 60%
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The number of atoms contained in one face-centred cubic unit cell of a monoatomic substance is:
1.  1
2.  2
3.  4
4.  6

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In the first order reaction, 75% of the reactant gets disappeared in 1.386 h. The rate constant of the reaction is:

 

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the most basic element is:
1.  Fluorine
2.  Iodine
3.  Chlorine
4.  Bromine

 62%
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