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Question

FoLi+2,r2:r5 wilbe-

  1. 9:25    
  2. 4:25    
  3. 25:4    
  4. 25:9    

The correct answer is: 4:25

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When the atomogolsheearbombarded with a be aof α-particles, only a few α- particleget deflected where as most of them gstraighun deflectedThiibecause–

IT was the logical conclusion of his experiment.

When the atomogolsheearbombarded with a be aof α-particles, only a few α- particleget deflected where as most of them gstraighun deflectedThiibecause–

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IT was the logical conclusion of his experiment.
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Mass of neutron is........times the mass of electron -

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Which has highest e/m ratio–

Massof isminimum

Which has highest e/m ratio–

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At rootemperaturesodium crystalisein a bodcentrecubicell with a=4.24Å. The thoretical densitosodiuis(Atomimass osodium=23.0gmol–1)

At rootemperaturesodium crystalisein a bodcentrecubicell with a=4.24Å. The thoretical densitosodiuis(Atomimass osodium=23.0gmol–1)

chemistry-General
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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.
  • 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.
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For the structure given below the site marked as S is a :

For the structure given below the site marked as S is a :

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A compounalloogold and copper crystallizes in a cube latticiwhich thgolatomoccupy the cornerof a cube and the copper atoms occupy thcentreoeacothcubfaces. The formulothis compounis-

One-eighthofeachcorneratom(Au)andone- half of each face-centered atom (Cu) are contained withintheunit cellofthecompound. Thus, the number ofAu atoms per unit cell

A compounalloogold and copper crystallizes in a cube latticiwhich thgolatomoccupy the cornerof a cube and the copper atoms occupy thcentreoeacothcubfaces. The formulothis compounis-

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One-eighthofeachcorneratom(Au)andone- half of each face-centered atom (Cu) are contained withintheunit cellofthecompound. Thus, the number ofAu atoms per unit cell
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Whaithsimplesformulof a soliwhose cubic unicelhathatom A ateach corner, the atom Baeacfaccentrand a Catom athe bodcentre-

Whaithsimplesformulof a soliwhose cubic unicelhathatom A ateach corner, the atom Baeacfaccentrand a Catom athe bodcentre-

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An equiconvex lens is cut into two halves along (i) XOX¢ and (ii) YOY¢ as shown in the figure. Let f, f ¢, f ¢¢ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively
Choose the correct statement from the following

An equiconvex lens is cut into two halves along (i) XOX¢ and (ii) YOY¢ as shown in the figure. Let f, f ¢, f ¢¢ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively
Choose the correct statement from the following

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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

By using formula fraction numerator mu subscript 2 end subscript over denominator v end fraction minus fraction numerator mu subscript 1 end subscript over denominator u end fraction equals fraction numerator mu subscript 2 end subscript minus mu subscript 1 end subscript over denominator R end fraction
fraction numerator 1.5 over denominator v end fraction minus fraction numerator 1 over denominator left parenthesis negative 15 right parenthesis end fraction equals fraction numerator left parenthesis 1.5 minus 1 right parenthesis over denominator plus 30 end fraction rightwards double arrow v equals negative 30 c m.
Negative sign shows that, image is obtained on the same side of object i.e. towards left.

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

physics-General
By using formula fraction numerator mu subscript 2 end subscript over denominator v end fraction minus fraction numerator mu subscript 1 end subscript over denominator u end fraction equals fraction numerator mu subscript 2 end subscript minus mu subscript 1 end subscript over denominator R end fraction
fraction numerator 1.5 over denominator v end fraction minus fraction numerator 1 over denominator left parenthesis negative 15 right parenthesis end fraction equals fraction numerator left parenthesis 1.5 minus 1 right parenthesis over denominator plus 30 end fraction rightwards double arrow v equals negative 30 c m.
Negative sign shows that, image is obtained on the same side of object i.e. towards left.
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A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed are

Number of images = (Number of materials)

A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed are

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Number of images = (Number of materials)
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In FCC crystal, which of the following shaded planes contains the following type of arrangement of atoms

In FCC crystal, which of the following shaded planes contains the following type of arrangement of atoms

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Assertion: Thvaluof Vander Waal constant a is higher for NH3 than foN2.
Reason: Hydrogen bonding is present in ammonia.

Assertion: Thvaluof Vander Waal constant a is higher for NH3 than foN2.
Reason: Hydrogen bonding is present in ammonia.

chemistry-General
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If 10-4 dm-3 owater is introduced into a1.0 dm-3 flask at 300K,homanmoleowater are in thvapouphase when equilibrium is established? (Given : Vapour pressure of H2O at300 is3170pa;R=8.314JK 1mol)

If 10-4 dm-3 owater is introduced into a1.0 dm-3 flask at 300K,homanmoleowater are in thvapouphase when equilibrium is established? (Given : Vapour pressure of H2O at300 is3170pa;R=8.314JK 1mol)

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Under identical conditionof temperature and pressure thratio of thrateof effisiooO2 anCO2 gases is giveby–

Under identical conditionof temperature and pressure thratio of thrateof effisiooO2 anCO2 gases is giveby–

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