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Which is/are true statement(s) about sil...

Which is/are true statement(s) about silicones ?

A

They are repeating units `(SiO_(4))` in silicates

B

They are synthetic polymers containing repeated `R_(2)SiO_(2)` units

C

They are formed by hydrolysis of `R_(2)SiCl_(2)` units

D

None is correct

Text Solution

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The correct Answer is:
B, C
`N//A`
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Knowledge Check

  • Which is/are true statements (s):

    A
    Protonation increases electrophilic nature of carbonyl group
    B
    `CF_(3)SO_(3)^(-)` is better leaving group than `CH_(3)SO_(3)^(-)`
    C
    Benzyl carbonium ion is stabilised by resonance
    D
    show H-Bonding

  • Which is true statement(s)?

    A
    Large is the value of ionisation enthalpy easier is the formation of cation.
    B
    Larger is the value of electron gain enthalpy, easier is the formation of anion.
    C
    Large is the have of ionisation energy as well as electron affinity, smaller is the Muliken electronegativity of atom.
    D
    Large to the `Z_(eff)` large is the size of atom.

  • Which is/are not the true statement(s) about KMnO_(4) ?

    A
    Its solution is unstable in acidic medium
    B
    It gets reduced to `MnO_(2)` in neutral medium
    C
    `MnO_(4)^(-)` changes to `Mn^(2+)` in basic medium
    D
    It is a self indicator in `FeSO_(4)` and oxalic acid titrations.

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