1
TS EAMCET 2023 (Online) 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

According to molecular orbital theory, the molecule which contains only $\pi$-bonds between the atoms is

A

$\mathrm{C}_2$

B

$\mathrm{N}_2$

C

$\mathrm{O}_2$

D

$\mathrm{B}_2$

2
TS EAMCET 2023 (Online) 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In which of the following changes there is no change in hybridisation of the central atom?

A

$\mathrm{C}_2 \mathrm{H}_4 \xrightarrow{\mathrm{H}_2 / \mathrm{Ni}} \mathrm{C}_2 \mathrm{H}_6$

B

$\mathrm{PCl}_5+\mathrm{Cl}^{-} \longrightarrow \mathrm{PCl}_6^{-}$

C

$\mathrm{BF}_3+\mathrm{F}^{-} \longrightarrow \mathrm{BF}_4^{-}$

D

$\mathrm{NH}_3+\mathrm{H}^{+} \longrightarrow \mathrm{NH}_4^{+}$

3
TS EAMCET 2023 (Online) 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The rate of diffusion of a gas $A$ is $\sqrt{5}$ times more than that of gas $B$. If the molar mass of $A$ is $x \mathrm{~g} \mathrm{~mol}^{-1}$, the molar mass of $B$ (in $\mathrm{g} \mathrm{mol}^{-1}$ ) is

A

$4 x$

B

$5 x$

C

$16 x$

D

$25 x$

4
TS EAMCET 2023 (Online) 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following has the same number of atoms as are in 6 g of $\mathrm{H}_2 \mathrm{O}$ ?

A

0.4 g He

B

$22 \mathrm{~g} \mathrm{CO}_2$

C

$1 \mathrm{gH}_2$

D

12 g CO

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