KIITEE Mock Test - 9

Question 1

What is the particle x in the following nuclear reaction?

Accepted Answer

<p>Neutron</p>

Answer

<p>Electron</p>

Answer

<p>Proton</p>

Answer

<p>Photon</p>

Question 2

Which is not electromagnetic wave in the following?

Accepted Answer

Cathode rays

Answer

Infrared rays

Answer

Answer

$γ$ - rays

Question 3

The minimum energy required to remove an electron is called

Accepted Answer

Work function

Answer

Stopping potential

Answer

Kinetic energy

Answer

None of these

Question 4

Light of wavelength 4000Å is incident on a sodium surface for which the threshold wave length of photo-electrons is 5420Å. The work function of sodium is

Accepted Answer

Answer

Answer

Answer

Question 5

A radioactive element has a half life of 15 years. The fraction that will decay in 30 years is

Accepted Answer

Answer

Answer

Answer

Question 6

The slope of frequency of incident light and stopping potential for a given surface will be

Accepted Answer

Answer

Answer

Answer

Question 7

When P₁₅³⁰ decays to become Si₁₄³⁰ the particle released is

Accepted Answer

<p>Electron</p>

Answer

α - particle

Answer

<p>Neutron</p>

Answer

<p>Positron</p>

Question 8

Sodium surface is subjected to ultraviolet and infrared radiations separately and the stopping potential of photoelectrons determined. Then the stopping potential is

Accepted Answer

More when ultraviolet is used

Answer

Equal in both cases

Answer

More when infrared is used

Answer

May be more or less for ultraviolet depending upon its intensity as compared to the intensity of infrared light

Question 9

The decay constant of a radio active substance is λ . Its half life is

Accepted Answer

<p>log e<sup>2</sup>/&lambda;</p>

Answer

<p>log<sup>2</sup>10/&lambda;</p>

Answer

<p>&lambda;/log<sup>2</sup>10</p>

Answer

<p>1/&lambda;</p>

Question 10

The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is

Accepted Answer

<p>3000 &Aring;</p>

Answer

<p>4125 &Aring;</p>

Answer

<p>2062.5 &Aring;</p>

Answer

<p>6000 &Aring;</p>

Question 11

In photoelectric effect experiment, the stopping potential for incident light of wave-length 4000 Å is 2 volt. If the wavelength is changed to 3000 Å, the stopping potential is

Accepted Answer

More than 2 volt

Answer

Answer

Less than 2 volt

Answer

Question 12

The work function of oxide coated tungsten emitter will be

Accepted Answer

Answer

Answer

Answer

Question 13

Einstein's work on the photoelectric effect provied support for the equation

Accepted Answer

Answer

Answer

Answer

K.E.=1/2m ν²

Question 14

Stopping potential for photoelectrons

Accepted Answer

Depends on both the frequency of the incident light and the nature of cathode material

Answer

Does not depend on the frequency of the incident light

Answer

Does not depend upon the nature of the cathode material

Answer

Depends upon the intensity of the incident light

Question 15

A heavy nucleus at rest breaks into two fragments which fly off with velocities 8:1. The ratio of radii of the fragments is

Accepted Answer

Answer

Answer

Answer

Question 16

The photoelectric threshold of a certain metal is 30 Å. If the radiation of 2000 Å is incident on the metal

Accepted Answer

Electrons will not be emitted

Answer

Positrons will be emitted

Answer

Protons will be emitted

Answer

Electrons will be emitted

Question 17

Structural formula of ethanenitrile is

Accepted Answer

CH₃C ≡ N

Answer

C₂H₅C ≡ N

Answer

C₂H₅NO₂

Answer

Question 18

The correct structure of Fe(CO)₅ is (Z = 26 for Fe)

Accepted Answer

Square pyramidal

Answer

<p>Octahedral</p>

Answer

Tetrahedral

Answer

Trigonal pyramidal

Question 19

In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily to

Accepted Answer

Supress the concentration of free aniline

Answer

Supress the hydrolysis to phenol

Answer

Ensure a stochiometric amount of nitrous acid

Answer

Neutralise the base liberated

Question 20

Which of the following shows maximum no. of oxidation states?

Accepted Answer

Answer

Answer

Answer

Question 21

In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily to

Accepted Answer

Supress the hydrolysis to phenol

Answer

Supress the concentration of free aniline

Answer

Ensure a stochiometric amount of nitrous acid

Answer

Neutralise the base liberated

Question 22

An electrolyte

Accepted Answer

possesses ions even in solid state

Answer

form complex ions in solution

Answer

gives ions only when electricity is passed

Answer

gives ions only when dissolved in water

Question 23

The standard deviation of 25 numbers is 40. If each of the numbers is increased by 5, then the new standard deviation will be

Accepted Answer

Answer

Answer

Answer

none of these

Question 24

The coefficient of correlation r satisfies

Accepted Answer

| r | ≤ 1

Answer

Answer

Answer

Question 25

If the roots of the equation (2k+1)x² - (7k-3)x+k+2=0 are reciprocal of each other, the value of k is

Accepted Answer

Answer

Answer

Answer

Question 26

The mean of 5 observations is 4.4 and their variance is 8.24. If three observations are 1, 2 and 6, the other two observations are

Accepted Answer

Answer

Answer

Answer

Question 27

11² + 12²+ 13² +....+20²is equal to

Accepted Answer

Answer

Answer

Answer

Question 28

Which of the following measures of marks is the most suitable one of central location for computing intelligence of students?

Accepted Answer

<p>Median</p>

Answer

Answer

Arithmetic mean

Answer

Geometric Mean

Question 29

The harmonic mean of 4,8,16 is

Accepted Answer

Answer

Answer

Answer

Question 30

p and q are the roots of x² + ax + b = 0, then equation whose roots are p²q, q²p is

Accepted Answer

x² + abx + b³ = 0

Answer

x² - abx + b³ = 0

Answer

bx² + x + a = 20

Answer

x² + ax + ab = 0

KIITEE Mock Test - 9 Free Online Test 2026

Full Mock Test & Solutions: KIITEE Mock Test - 9 (120 Questions)

What is the particle x in the following nuclear reaction?

Which is not electromagnetic wave in the following?

The minimum energy required to remove an electron is called

Light of wavelength 4000Å is incident on a sodium surface for which the threshold wave length of photo-electrons is 5420Å. The work function of sodium is

A radioactive element has a half life of 15 years. The fraction that will decay in 30 years is

The slope of frequency of incident light and stopping potential for a given surface will be

When P1530 decays to become Si1430 the particle released is

Sodium surface is subjected to ultraviolet and infrared radiations separately and the stopping potential of photoelectrons determined. Then the stopping potential is

The decay constant of a radio active substance is λ . Its half life is

The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is

In photoelectric effect experiment, the stopping potential for incident light of wave-length 4000 Å is 2 volt. If the wavelength is changed to 3000 Å, the stopping potential is

The work function of oxide coated tungsten emitter will be

Einstein's work on the photoelectric effect provied support for the equation

Stopping potential for photoelectrons

A heavy nucleus at rest breaks into two fragments which fly off with velocities 8:1. The ratio of radii of the fragments is

The photoelectric threshold of a certain metal is 30 Å. If the radiation of 2000 Å is incident on the metal

Structural formula of ethanenitrile is

The correct structure of Fe(CO)₅ is (Z = 26 for Fe)

In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily to

Which of the following shows maximum no. of oxidation states?

In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily to

An electrolyte

The standard deviation of 25 numbers is 40. If each of the numbers is increased by 5, then the new standard deviation will be

The coefficient of correlation r satisfies

If the roots of the equation (2k+1)x2 - (7k-3)x+k+2=0 are reciprocal of each other, the value of k is

The mean of 5 observations is 4.4 and their variance is 8.24. If three observations are 1, 2 and 6, the other two observations are

112 + 122+ 132 +....+202 is equal to

Which of the following measures of marks is the most suitable one of central location for computing intelligence of students?

The harmonic mean of 4,8,16 is

p and q are the roots of x2 + ax + b = 0, then equation whose roots are p2q, q2p is

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KIITEE Mock Test Series 2026

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When P₁₅³⁰ decays to become Si₁₄³⁰ the particle released is

If the roots of the equation (2k+1)x² - (7k-3)x+k+2=0 are reciprocal of each other, the value of k is

11² + 12²+ 13² +....+20²is equal to

p and q are the roots of x² + ax + b = 0, then equation whose roots are p²q, q²p is