Entrance Exams Question and Answers

Physics Most Viewed Questions

1. 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

2. To draw maximum current from a combination of cells, how should the cells be grouped?

AFMC 2006 Current Electricity

3. An electron jumps from the 4th orbit to 2nd orbit of hydrogen atom. Given the Rydberg's constant $R=10^5 cm^{-1} $ the frequency in hertz of the emitted radiation will be

AFMC 2010 Atoms

4. A tuning fork with frequency 800 Hz produces resonance in a resonance column tube with upper end open and lower end closed by water surface. Successive resonance are observed at length 9.75 cm, 31.25 cm and 52.75 cm. The speed of sound in air is :

NEET 2019 Waves

5. The period of revolution of planet A around the sun is 8 times that of B. The distance of A from the sun is how many times greater than that of B from the sun?

AIPMT 1997 Gravitation

6. Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities $\omega_1$ and $\omega_2$ . They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:-

NEET 2017 System Of Particles And Rotational Motion

7. The temperature of 100 g of water is to be raised from 24°C to 90°C by adding steam to it. The mass of the steam required for this purpose is

JIPMER 2015 Thermal Properties Of Matter

8. The hot wire ammeter measures

Rajasthan PMT 2004 Alternating Current

9. The diameter of a flywheel is increased by 1%. Increase in its moment of inertia about the central axis is

JIPMER 2015 System Of Particles And Rotational Motion

10. A body of mass 4 kg is accelerated upon by a constant force, travels a distance of 5 m in the first second and a distance of 2 m in the third second. The force acting on the body is

KCET 2008 Laws Of Motion

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Chemistry Most Viewed Questions

1. An acidic buffer solution can be prepared by mixing the solution of

IIT JEE 1981 Equilibrium

2. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives

IIT JEE 2001 Aldehydes Ketones and Carboxylic Acids

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

IIT JEE 1992 Equilibrium

4. Acetone is mixed with bleaching powder to give

AFMC 2004 Aldehydes Ketones and Carboxylic Acids

5. 75% of a first order reaction was completed in 32 minutes. When was 50% of the reaction completed

COMEDK 2010 Chemical Kinetics

6. How many litres of water must be added to 1 L of an aqueous solution of HCL with a pH of 1to create an aqueous solution with pH of 2?

JEE Advanced 2013 Equilibrium

7. The radii of $Na^+$ and $Cl^{-1}$ ions are 95 pm and 181 pm respectively. The edge length of NaCl unit cell is

KCET 2006 The Solid State

8. Acidic hydrogen is present in

IIT JEE 1985 Hydrocarbons

9. X is heated with soda lime and gives ethane. X is

AFMC 2005 Aldehydes Ketones and Carboxylic Acids

10. The oxidation state of Cr in CrO₆ is :

NEET 2019 Redox Reactions

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Mathematics Most Viewed Questions

1. Domain of definition of the function $f(x)=\frac{3}{4-x^2}+ \log_{10}(x^3-x)$

AIEEE 2002 Sets

2. 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

3. Let $ \omega \ne 1$ be a cube root of unity and S be the set of all non-singular matrices of the form $\begin {bmatrix} 1 & a & b \\ \omega & 1 & c \\ \omega^2 & \omega & 1 \end {bmatrix}$ where each of a , b and c is either $\omega \ or \ omega^2$ Then, the number of distinct matrices in the set S is

IIT JEE 2011 Determinants

4. 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

5. The centre of the circle passing through the point (0, 1)and touching the curve $y = x^2 at (2,4)$ is

IIT JEE 1983 Conic Sections

6. A ray of light along $x+\sqrt 3 \, y=\sqrt 3$ gets reflected upon reaching X-axis, the equation of the reflected ray is

JEE Main 2013 Straight Lines

7. A ray of light along $x+\sqrt 3 \, y=\sqrt 3$ gets reflected upon reaching X-axis, the equation of the reflected ray is

JEE Main 2013 Straight Lines

8. A ray of light along $x+\sqrt 3 \, y=\sqrt 3$ gets reflected upon reaching X-axis, the equation of the reflected ray is

JEE Main 2013 Straight Lines

9. 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

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

JEE Advanced 2014 Integrals

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Biology Most Viewed Questions

1. Fluoride pollution mainly affects

AIPMT 2003 Environmental Issues

2. The edible part of the fruit of apple is

J & K CET 2012 Morphology of Flowering Plants

3. The edible part of the fruit of apple is

J & K CET 2012 Morphology of Flowering Plants

4. The edible part of the fruit of apple is

J & K CET 2012 Morphology of Flowering Plants

5. The edible part of the fruit of apple is

J & K CET 2012 Morphology of Flowering Plants

6. Venous heart is found in

Odisha JEE 2012 Animal Kingdom

7. Edible part of banana

AIPMT 2001 Morphology of Flowering Plants

8. The endosperm of gymnosperm is

AIPMT 1999 Sexual Reproduction in Flowering Plants

9. The largest herbarium in India is located in

Odisha JEE 2009 Diversity In The Living World

10. Which one holds corona radiata ?

Maharashtra CET 2007 Human Reproduction

Physics Most Viewed Questions

1. 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)

2. To draw maximum current from a combination of cells, how should the cells be grouped?

3. An electron jumps from the 4th orbit to 2nd orbit of hydrogen atom. Given the Rydberg's constant $R=10^5 cm^{-1} $ the frequency in hertz of the emitted radiation will be

4. A tuning fork with frequency 800 Hz produces resonance in a resonance column tube with upper end open and lower end closed by water surface. Successive resonance are observed at length 9.75 cm, 31.25 cm and 52.75 cm. The speed of sound in air is :

5. The period of revolution of planet A around the sun is 8 times that of B. The distance of A from the sun is how many times greater than that of B from the sun?

7. The temperature of 100 g of water is to be raised from 24°C to 90°C by adding steam to it. The mass of the steam required for this purpose is

8. The hot wire ammeter measures

9. The diameter of a flywheel is increased by 1%. Increase in its moment of inertia about the central axis is

10. A body of mass 4 kg is accelerated upon by a constant force, travels a distance of 5 m in the first second and a distance of 2 m in the third second. The force acting on the body is

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Chemistry Most Viewed Questions

1. An acidic buffer solution can be prepared by mixing the solution of

2. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives

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

4. Acetone is mixed with bleaching powder to give

5. 75% of a first order reaction was completed in 32 minutes. When was 50% of the reaction completed

6. How many litres of water must be added to 1 L of an aqueous solution of HCL with a pH of 1to create an aqueous solution with pH of 2?

7. The radii of $Na^+$ and $Cl^{-1}$ ions are 95 pm and 181 pm respectively. The edge length of NaCl unit cell is

8. Acidic hydrogen is present in

9. X is heated with soda lime and gives ethane. X is

10. The oxidation state of Cr in CrO6 is :

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Mathematics Most Viewed Questions

1. Domain of definition of the function $f(x)=\frac{3}{4-x^2}+ \log_{10}(x^3-x)$

2. 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

4. 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

5. The centre of the circle passing through the point (0, 1)and touching the curve $y = x^2 at (2,4)$ is

6. A ray of light along $x+\sqrt 3 \, y=\sqrt 3$ gets reflected upon reaching X-axis, the equation of the reflected ray is

7. A ray of light along $x+\sqrt 3 \, y=\sqrt 3$ gets reflected upon reaching X-axis, the equation of the reflected ray is

8. A ray of light along $x+\sqrt 3 \, y=\sqrt 3$ gets reflected upon reaching X-axis, the equation of the reflected ray is

9. 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

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

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Biology Most Viewed Questions

1. Fluoride pollution mainly affects

2. The edible part of the fruit of apple is

3. The edible part of the fruit of apple is

4. The edible part of the fruit of apple is

5. The edible part of the fruit of apple is

6. Venous heart is found in

7. Edible part of banana

8. The endosperm of gymnosperm is

9. The largest herbarium in India is located in

10. Which one holds corona radiata ?

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10. The oxidation state of Cr in CrO₆ is :

2. 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