Question

Q2. State modern periodic law.
Q3. Which two of the following compound could belong to the same
homologous series. Give reason for your choice.
C2H6, C3H8,C2H2,C3H6
04. What do you understand by 'VIBGYOR?​

Answer 1

Answer:

1.Properties of elements are periodic function of their atomic number

2.C2H6 and C3H8 they belong to alkane group with formula CnH2n

3.The 7 colours of the rainbow formed by dispersion of white light

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Answer 2

2) The modern periodic law states that 'Properties of elements are a periodic function of their atomic number'.

3) In the provided list, the compounds C2H6 and C3H8 belong to the same alkane group of CnH2n.

4) When the white light falls on one side of the glass prism, it gets split into a band of seven colours. The colours of this spectrum obtained are as follows:

V - Violet

I - Indigo

B - Blue

G - Green

Y - Yellow

O - Orange

R - Red