Arjuna JEE 2025 Quiz: Neutrons in Zinc Ion

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Questions and Answers

What does not change when the unit is changed?

The number of significant figures (correct)

The value of the physical quantity

The precision of the measurement

The unit of measurement

If α and β are the roots of the equation x^2 + px + q = 0, what is the value of α + β?

-q

-p (correct)

What is the correct expression for the force applied by a water stream?

Av^2

ρAv

ρv^2

ρAv^2 (correct)

If the wavelength of light is equal to the distance travelled by an electron in one second, what can be concluded?

The frequency of light is equal to the reciprocal of the time period of the electron Signup and view all the answers

To increase the kinetic energy of ejected photoelectrons, what should be increased?

Frequency of radiation Signup and view all the answers

Which of the following is not a factor that affects the force applied by a water stream?

Viscosity of water Signup and view all the answers

What is the correct statement about significant figures?

A change in unit may or may not change the number of significant figures Signup and view all the answers

What is the relationship between the roots of a quadratic equation?

α + β = -p Signup and view all the answers

What is the total duration of the SHORT PRACTICE TEST?

90 minutes Signup and view all the answers

What is the total number of questions in the test booklet?

24 Signup and view all the answers

What is the maximum marks for the test?

96 Signup and view all the answers

What is the penalty for a wrong response?

1 mark deduction Signup and view all the answers

What is the topic covered in Physics?

Units and Measurements (Complete Chapter) Signup and view all the answers

What is the topic covered in Chemistry?

Atomic Structure Till Debroglie Equation Signup and view all the answers

What type of pens should be used to mark the answers?

Blue/black dark ballpoint pens Signup and view all the answers

What should be avoided while marking the answers?

All of the above Signup and view all the answers

What should not be used to rectify filling errors on an OMR sheet?

Whiteners Signup and view all the answers

Where is writing permitted on the OMR sheet?

Only in the specified area Signup and view all the answers

What happens if there are multiple markings on an OMR sheet?

It will be treated as an invalid response Signup and view all the answers

What should not be done to the Answer Sheet (OMR)?

Folding or making stray marks Signup and view all the answers

What is the value of $\left(0.99\right)^{10}$ using Binomial approximation?

9.97 Signup and view all the answers

What is the correct expression for acceleration due to gravity at height using the Binomial theorem?

g(1 - h/R) Signup and view all the answers

What is the purpose of weighing a body in air and water?

To find the relative density of the body Signup and view all the answers

What is the purpose of finding the sum of a series in a question?

To find the sum of the series Signup and view all the answers

What is the total number of neutrons in dipositive zinc ions with atomic number 30 and mass number 70?

36 Signup and view all the answers

What is the radius of Bohr's orbit of a hydrogen atom?

√13 Signup and view all the answers

Which orbit will an electron be in when it is in an excited state?

7 Signup and view all the answers

If the energy of an electron in the ground state is -E, what will be the energy of the electron in the excited state?

-E/9 Signup and view all the answers

If the angular momentum of an electron is √(10) ℏ, what will be the value of Z?

2.5 Signup and view all the answers

What is the correct statement about the set of days in a week?

It is a finite set Signup and view all the answers

What is the correct relationship between the atomic number and the mass number of an atom?

Mass number = Atomic number + Neutrons Signup and view all the answers

What is the energy of an electron in the ground state of a hydrogen atom?

-13.6 eV Signup and view all the answers

Study Notes

Arjuna JEE (2025) Short Practice Test - 02

Test Details

Duration: 90 minutes
Date: 26/05/2024
Maximum marks: 96

Topic Covered

Physics: Units and Measurements, Mathematical Tools (Algebra, AP series, GP series, Binomial Expression)
Chemistry: Atomic Structure (up to Debroglie Equation)
Mathematics: Basic Mathematics, Sets

General Instructions

Fill in the particulars on the test booklet
The test consists of 24 questions, divided into three sections: Physics, Chemistry, and Mathematics
Each correct answer is worth 4 marks, and 1 mark will be deducted for a wrong response
No student is allowed to carry any textual material, electronic devices, etc. inside the examination room/hall

OMR Instructions

Use blue/black dark ballpoint pens
Darken the bubbles completely
Never use pencils or whiteners to mark answers
Writing on the OMR Sheet is permitted only on the specified area
Multiple markings will be treated as invalid responses
Do not fold or make any stray mark on the Answer Sheet

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Description

Practice test for JEE 2025 with 24 questions covering Physics, Chemistry, and Mathematics topics. Duration is 90 minutes.

Arjuna JEE 2025 Practice Test - 02