1
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Given the ratio of kinetic energy of electron in two orbitals is $16: 9$. Calculate the ratio of wavelength of electron waves?

A

$4: 3$

B

$9: 16$

C

$3: 4$

D

$16: 9$

2
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following results is not true about photoelectric effect?

A

The electrons are ejected from the metal surface as soon as the beam of light strikes to the surface.

B

The number of electrons ejected is proportional to the intensity or brightness of light.

C

There is a time lag between the striking of light beam and the ejection of electrons from the metal surface.

D

For each metal, there is a characteristic minimum frequency below which photoelectric is not observed.

3
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Trans uranium elements are

A

elements before uranium

B

inter transition elements

C

elements after uranium

D

actinoid elements

4
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Arrange the following ions in the correct order with respect to their ionic radii.

A

$\mathrm{Br}^{-}>\mathrm{Cl}^{-}>\mathrm{Na}^{+}>\mathrm{Be}^{2+}$

B

$\mathrm{Be}^{2+}>\mathrm{Na}^{+}>\mathrm{Cl}^{-}>\mathrm{Br}^{-}$

C

$\mathrm{Cl}^{-}>\mathrm{Br}^{-}>\mathrm{Na}^{+}>\mathrm{Be}^{2+}$

D

$\mathrm{Na}^{+}>\mathrm{Be}^{2+}>\mathrm{Br}^{-}>\mathrm{Cl}^{-}$

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