1
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Choose the correct order of second ionisation enthalpies of carbon, nitrogen, oxygen and fluorine.
A

carbon $>$ nitrogen $>$ oxygen $>$ fluorine

B

oxygen $>$ carbon $>$ nitrogen $>$ fluorine

C

fluorine $>$ nitrogen $>$ carbon $>$ oxygen

D

oxygen $>$ fluorine $>$ nitrogen $>$ carbon

2
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

From the following, identify the ions with same bond order.

I. $\mathrm{CN}^{-} \quad$ II. $\quad \mathrm{N}_2^{+}$

III. $\mathrm{O}_2^{2-}$ IV. $\mathrm{NO}^{+}$

A

I and II only

B

II and III only

C

I and IV only

D

I and III only

3
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The hybridisations of the central atom in the molecules $\mathrm{BF}_3, \mathrm{BeF}_2, \mathrm{BrF}_3$ are respectively.

A

$s p^2, s p, s p^3 d$

B

$s p, s p^2, s p^3$

C

$s p^3, s p, s p^3 d$

D

$s p^2, s p^3, d s p^2$

4
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of rates of diffusion of gases $X$ and $Y$ of molecular weights 36 and 64 is

A

$9: 16$

B

$3: 4$

C

$4: 3$

D

$16: 9$

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