## 1. If in a photoelectric cell, the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be

JIPMER 2015 Dual Nature Of Radiation And Matter

## 2. If C and R denote capacitance and resistance, the dimensional formula of CR is

AIPMT 1988 Physical World, Units and Measurements

## 3. The velocity of sound in any gas depends upon

AIPMT 1988 Oscillations

## 4. Six equal capacitors each of capacitance C are connected as shown in the figure. Then the equivalent capacitance between A and B is

JIPMER 2013 Electrostatic Potential And Capacitance

## 5. The increase in pressure required to decrease the 200 L volume of a liquid by 0.004% (in kPa) is (Bulk modulus of the liquid ==2100 MPa)

Maharashtra CET 2006 Mechanical Properties Of Solids

## 6. A ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor. Which figure represents the track of its centre of mass?

AIIMS 2005 System Of Particles And Rotational Motion

## 7. In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of galvanometer is x, what would be its value if the radius of the wire AB is doubled ?

IIT JEE 2003 Current Electricity

## 8. A parallel plate capacitor of area A, plate separation d and capacitance C is filled with three different dielectric materials having dielectric constants $K_1,K_2 \ and \ K_3$ as shown. If a single dielectric material is to be used to have the same capacitance C in this capacitor then its dielectric constant K is given by

IIT JEE 2000 Electrostatic Potential And Capacitance

## 9. An object is kept on a smooth inclined plane of 1 in $l$. The horizontal acceleration to be imparted to the inclined plane so that the object is stationary relative to the incline is

JIPMER 2014 Laws Of Motion

## 10. A circle of radius a has charge density given by $\lambda = \lambda_0 \ cos^2 \ \theta$ on its circumference. What will be the total charge on the circle?

Gujarat CET 2008 Electric Charges And Fields

## 1. Which of the following solutions will have pH close to 1.0 ?

IIT JEE 1992 Equilibrium

## 2. Rutherford's scattering experiment is related to the size of the

IIT JEE 1983 Structure of Atom

## 3. Diethyl ether on heating with conc. HI gives two moles of

JIPMER 2012 Alcohols Phenols and Ethers

## 4. For a first order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 20 min. The time required to reduce initial concentration by a factor of 1/16 is

KEAM 2011 Chemical Kinetics

## 5. What is the two third life of a first order reaction having $k = 5.48 \times 10^{-14} \ s^{-1}$ ?

J & K CET 2006 Chemical Kinetics

## 6. The most convenient method to protect the bottom of the ship made of iron is

AIPMT 2001 Electrochemistry

## 7. In the alumino-thermite process, aluminium acts as

IIT JEE 1983 General Principles and Processes of Isolation of Elements

## 8. Extra pure $N_2$ can be obtained by heating

IIT JEE 2011 The p-Block Elements - Part2

## 9. A gas that cannot be collected over water is

IIT JEE 1985 The p-Block Elements - Part2

## 10. The molar conductivities of $\ce{NaOH, NaCl}$ and $\ce{ BaCl2}$ at infinite dilution are $\ce{2.481 \times 10^{-2}\, S \, m^2\, mol^{-1}, 1.265 \times 10^{-2} \, S\, m^2\, mol^{-1}}$ and $\ce{2.800 \times 10^{-2} \, S \, m^2\, mol^{-1}}$ respectively. The molar conductivity of $\ce{Ba(OH)_2}$ at infinite dilution will be

COMEDK 2014 Electrochemistry

## 1. The integral $\int^{\pi/2}_{\pi/4} ( 2 \ cosec \ x )^{17} \ dx$ is equal to

JEE Advanced 2014 Integrals

## 2. If the roots of the equation $x^2 - 2ax + a^2 + a - 3 = 0$ are real and less than 3, then

IIT JEE 1999 Complex Numbers and Quadratic Equations

## 3. Perpendicular are drawn from points on the line $\frac{x+2}{2}=\frac{y+1}{-1}= \frac{z}{3}$ to the plane $x+ y + z = 3$. The feet of perpendiculars lie on the line

JEE Advanced 2013 Introduction to Three Dimensional Geometry

## 4. If $\int\limits \frac{\cos \, 8x + 1}{ \tan \, 2x - \cot \, 2x} dx = a \, \cos \, 8x + c ,$ then $a$ =

COMEDK 2015 Integrals

## 5. Let AB be a chord of the circle $x^2 + y^2 = r^2$ subtending a right angle at the centre. Then, the locus of the centroid of the $\Delta PAB$ as P moves on the circle, is

IIT JEE 2001 Conic Sections

## 6. For $r = 0, 1, ... , 10,$ if $A_r,B_r$ and $C_r$ denote respectively the coefficient of $x^r$ in the expansions of $(1 + x)^{10}, (1 + x)^{20}$ and $(1 + x)^{30}$. Then, $\displaystyle \sum A_r(B_{10}B_r-C_{10}A_r)$ is equal to

IIT JEE 2010 Binomial Theorem

## 7. If the first and the $(2n - 1)th$ term of an $AP, GP$ and $HP$ are equal and their nth terms are $a, b$ and $c$ respectively, then

IIT JEE 1988 Sequences and Series

## 8. The largest interval for which $x^{12} - x^9 + x^4 - x + 1 > 0$ is

IIT JEE 1982 Complex Numbers and Quadratic Equations

## 9. If $\alpha$ and $\beta$ are the roots of $x^2+px+q=0$ and $\alpha^4$,$\beta^4$ are the roots of $x^2-rx+s=0,$ then the equation $x^2-4qx+2q^2-r=0$ has always

IIT JEE 1989 Complex Numbers and Quadratic Equations

## 10. If $^{n-1}C_r =(k^2 -3) \ ^nC_{r+1}$then k belongs to

IIT JEE 2004 Binomial Theorem

## 1. Praying mantis is a good example of

AIPMT 2006 Evolution

## 2. The residual persistent nucellus is known as

AMU 2010 Sexual Reproduction in Flowering Plants

## 3. The residual persistent nucellus is known as

AMU 2010 Sexual Reproduction in Flowering Plants

## 4. Static concept of species was put forward by

AIPMT 1988 Diversity In The Living World

## 5. Edible part of banana

AIPMT 2001 Morphology of Flowering Plants

## 6. Venous heart is found in

Odisha JEE 2012 Animal Kingdom

## 7. The edible part of the fruit of apple is

KCET 2013 Morphology of Flowering Plants

## 8. Mango juice is obtained from

AIPMT 1989 Morphology of Flowering Plants

## 9. The term phylum was given by

AIPMT 1992 Diversity In The Living World

## 10. Winged pollen grains develop in

Madhya Pradesh PMT 2012 Plant Kingdom