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# QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries)

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## 15 Questions MCQ Test | QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries)

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) for JEE 2023 is part of JEE preparation. The QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) questions and answers have been prepared according to the JEE exam syllabus.The QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) MCQs are made for JEE 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) below.
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QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 1

### Radioactive substance do not emit [CPMT 1997; AIEEE 2003]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 2

### In a radioactive substance at t=0, the number of atoms is 8×10​4. Its half life period is 3 years. The number of atoms 1×104  will remain after interval [MP PMT/PET 1988]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 3

### The half-life period of radium is 1600 years. The fraction of a sample of radium that would remain after 6400 years is [NCERT 1980; SCRA 1994; JIPMER 1997 CBSE PMT 1994; MNR 1998; MP PMT 2004; DPMT 2004]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 4

During a negative beta decay [IIT 1987; MNR 1990]

Detailed Solution for QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 4

Negative β−decay is expressed by the equation n=p++e--

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 5

Which can pass through 20 cm thickness of the steel [MNR 1985; CPMT 1990; RPET 2000]

Detailed Solution for QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 5

γ-rays are highly penetrating.

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 6

The half-life period of radium is 1600 years. Its average life time will be [MP PET/PMT 1988]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 7

What percentage of original radioactive atoms is left after five half lives [AFMC 1996; RPMT 1996]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 8

Beta rays emitted by a radioactive material are [IIT 1983; ISM Dhanbad 1994; AFMC 1997; BHU 2000; AIEEE 2002]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 9

Alpha rays emitted from a radioactive substance are [CBSE PMT 1999; RPET 2000]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 10

n the given reaction  XzA→ YAZ+1 → KZ-1A-4→ *KZ-1A-4 Radioactive radiations are emitted in the sequence [AIIMS 1982; CBSE PMT 1993; AFMC 1999; MP PET 2002]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 11

Half-life of Bi210 is 5 days. If we start with 50,000 atoms of this isotope, the number of atoms left over after 10 days is [MP PET 1993]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 12

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 13

The radioactivity of a certain radioactive element drops to 1/64 of its initial value in 30 seconds. Its half-life is [CPMT 1990, 97]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 14

Which of the following is in the increasing order for penetrating power [IIT 1994; RPET 2003]

QUIZ 1:Radioactivity And Nuclear Physics(#freetestseries) - Question 15

The half-life of a radioactive element which has only 1/32 of its original mass left after a lapse of 60 days is [MP PET 1992; DPMT 2002]

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