Chemistry-
General
Easy
Question
The wave number of first line of Balmer series of hydrogen atom is15200cm–1.Whatisthe wave number of first line of Balmer series of Li2+ ion:
- 15200cm–1
- 13680000cm–1
- 76000cm–1
- 13680cm–1
The correct answer is: 13680000cm–1
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IT was the logical conclusion of his experiment.
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General
________ is a sudden shaking of the Earth’s crust.
The correct option is c)Earthquake.
- An earthquake (also called a tremor, tremor, or tremor) is a shaking of the earth's surface caused by the sudden release of energy in the earth's lithosphere that produces seismic waves.
- The strength of an earthquake can range from weak enough to be felt to strong enough to throw objects and people into the air and destroy entire cities.
- On the earth's surface, earthquakes appear as ground vibrations, displacements, and disturbances. If the epicenter of a large earthquake is offshore, the seafloor may shift and generate a tsunami. Earthquakes can also cause landslides.
________ is a sudden shaking of the Earth’s crust.
GeneralGeneral
The correct option is c)Earthquake.
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- The strength of an earthquake can range from weak enough to be felt to strong enough to throw objects and people into the air and destroy entire cities.
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For the structure given below the site marked as S is a :

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A point object O is placed in front of a glass rod having spherical end of radius of curvature 30 cm. The image would be formed at

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By using formula 
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Negative sign shows that, image is obtained on the same side of object i.e. towards left.
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Number of images = (Number of materials)