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In a chain reaction, uranium atom gets fissioned forming two different materials. The total weight of these put together is ...

When 92U235 nuclide is bombarded with slow neutrons, the nuclide undergoes ...

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In β-decay, n/p ratio ...

Which of the following nuclei is unstable? ...

if n/p ratio is high, the nucleus tends to stabilize by ...

During α decay, n/p ratio ...

A wood piece is 11460 years old. What is the fraction of C-14 activity left in the piece(t1/2 of C-14 is 5730 years) ...

A piece of wood shows a C-14 activity which is 60% of the activity found today. The age of the sample is (t1/2 for C-14 is 5770 years) ...

Wooden artifact and a freshly cut down tree give 7.6 and 15.2 counts min-1 g-1 of carbon respectively. The age of the artifact is(t1/2=5600 years) ...

Loss of β-particle is equivalent to ...

An isotope of X239 can be converted to X235 by the emission of ...

In the nuclear reaction 92U235→82Pb207, the number of α & β particles lost would be ...

The loss of α particle results in ...

Which of the following represents isobars? ...

Which of the following pairs represents isotopes? ...

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In Frenkel defect ...

Silicon doped with arsenic is ...

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The density of crystal increases because of ...

In Schottky defect ...

The packing fraction in hcp is ...

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The packing fraction in ccp is ...

The packing fraction in bcc is ...

A compound contains A & B elements. Atoms A are in ccp arrangement while B occupy two-third octahedral voids. Formula of the compound is ...

A compound contains A & B elements. Atoms A are in ccp arrangement while B occupy all tetrahedral voids. Formula of the compound is ...

A substance crystallizes in a face-centered cubic(fcc) lattice in which atoms "A" occupy each corner of the cube and atoms "B"occupy the face-centres of the cube. The simplest formula of the substance is ...