Email
Chat with tutors
Login
Ask Questions, Get Answers
Menu
X
home
ask
tuition
questions
practice
papers
mobile
tutors
pricing
X
Recent questions tagged 4
Questions
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :-
neet
chemistry
past papers
2019
4
asked
Jul 8, 2019
by
pady_1
2
answers
The relation $\overrightarrow{F} = m \overrightarrow{a}$, cannot be deducted from Newton's second law, if :
jeemain
physics
past papers
1998
4
asked
Dec 19, 2018
by
pady_1
0
answers
The mass of a balloon with its contents is 1.5 kg. It is descending with an acceleration equal to half that of acceleration due to gravity. If it is to go up with the same acceleration, keeping the volume same, its mass should be decreased by :
jeemain
physics
past papers
1999
4
asked
Dec 19, 2018
by
pady_1
0
answers
The pole strength of a $12\;cm$ long bar magnet is $2.0 \; Am$. The magnetic induction at a point $10\;cm$ away from the centre of the magnet on the axial line is : <br> $\begin{pmatrix} \frac{\mu_0}{4 \pi}= 10^{-7} Hm^{-1} \end{pmatrix}$
jeemain
physics
past papers
2000
4
asked
Dec 19, 2018
by
pady_1
0
answers
A $20\; F$ capacitor is charged to $5\; V$ and isolated. It is then connected in parallel with an uncharged $30\;F$ capacitor. The decrease in the energy of the system will be :
jeemain
physics
past papers
2001
4
asked
Dec 11, 2018
by
pady_1
0
answers
If a body loses hald of its velocity on penetrating 3 cm in a wooden block, then how much will it penetrate more before coming to rest ?
jeemain
physics
past papers
2002
4
asked
Dec 11, 2018
by
pady_1
0
answers
A magnetic needle lying parallel to a magnetic field requires $W$ unit of work to turn it through $60^{\circ}$. The torque needed to maintain the needle in this position will be :
jeemain
physics
past papers
2003
4
asked
Dec 11, 2018
by
pady_1
0
answers
Two batteries with e.m.f 12 V and 13 V are connected in paralled across a load resistor of $10 \Omega$. The internal resistance of the two batteries are $1 \Omega$ and $2 \Omega$ respectively. The voltage across the load lies between :
jeemain
physics
past papers
2018
4
asked
Dec 11, 2018
by
pady_1
0
answers
For three events A, B and C, P(Exactly one of A or B occurs) = P(Exactly one of B or C occurs) = P(Exactly one of C or A occurs) = $\frac{1}{4}$ and P (All the three events occur simultaneously) = $\frac{1}{6}$. Then the probability that at least one of the events occurs, is :
jeemain
math
past papers
2017
4
asked
Dec 11, 2018
by
pady_1
1
answer
A person trying to lose weight by burning fat lifts a mass of $10\; kg$ upto a height of $1\; m \;1000\; times$. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies $3.8 \times 10^7 \;J$ of energy per kg which is converted to mechanical energy with a $20\%$ efficiency rate. Take $g=9.8 \;ms^{−2}$ :
jeemain
physics
past papers
2016
4
asked
Dec 11, 2018
by
pady_1
1
answer
A block of mass $m=0.1 \;kg$ is connected to a spring of unknown spring constant $k$. It is compressed to a distance $x$ from its equilibrium position and released from rest. After approaching half the distance$(\frac{x}{2})$ from equilibrium position, it hits another block and comes to rest momentarily, while the other block moves with a velocity $3 \;ms^{-1}$ . The total initial energy of the spring is :
jeemain
physics
past papers
2015
4
asked
Dec 11, 2018
by
pady_1
0
answers
The current voltage relation of diode is given by $I = (e^{1000V/T}– 1) \;mA$, where the applied voltage V is in volts and the temperature T is in degree Kelvin. If a student makes an error measuring $\pm 0.01 \;V$ while measuring the current of 5 mA at 300 K, what will be the error in the value of current in mA ?
jeemain
physics
past papers
2014
4
asked
Dec 11, 2018
by
pady_1
0
answers
The molrity of a solution obtained by mixing 750 mL of 0.5 (M) HCl with 250 mL of 2(M) HCl will be :
jeemain
chemistry
past papers
2013
4
asked
Dec 11, 2018
by
pady_1
0
answers
Statement 1 : The sum of the series $ 1 + ( 1 + 2+4) + (4+6+9) + (9+12+16) + .......+ (361 + 380+400)$ is $8000$. <br> Statement 2 : $\displaystyle\sum_{k=1}^{n} (k^3 - ( k-1)^3 ) = n^3$ for any natural number $n$.
jeemain
math
past papers
2012
4
asked
Dec 11, 2018
by
pady_1
2
answers
Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly (Surface tension of soap solution = $ 0.03 Nm^{-1}$) :
jeemain
physics
past papers
2011
4
asked
Dec 11, 2018
by
pady_1
0
answers
Consider the reaction : $Cl_2(aq) + H_2S(aq) \to S(s) + 2H^{+}(aq) + 2Cl^{–} (aq)$ The rate equation for this reaction is rate $= k [Cl_2] [H_2S]$ Which of these mechanisms is/are consistent with this rate equation ?
<br> (A) $Cl_2 + H_{2}S \to H^+ + Cl^- + Cl^+ + HS^- \;$ (slow)
$Cl^{+} + HS^{–} \to H^+ + Cl^- + S (fast)$
<br> $(B)\; H_2S \Leftrightarrow H^+ + HS^- $(fast equilibrium)
$Cl_2 + HS^{–} \to 2Cl^{–} +H^+ + S$ (slow)
jeemain
chemistry
past papers
2010
4
asked
Dec 11, 2018
by
pady_1
0
answers
The logic circuit below has the input waveforms 'A' and 'B' as shown. Pick out the correct output waveform. <br>
jeemain
physics
past papers
2009
4
asked
Nov 29, 2018
by
pady_1
0
answers
A focus of an ellipse is at the origin. The directrix is the line x = 4 and the eccentricity is $\frac{1}{2}$. Then the length of the semi-major axis is
jeemain
math
past papers
2008
4
asked
Nov 29, 2018
by
pady_1
0
answers
The set $S : \{1, 2, 3, . . . . ,12\}$ is to be partitioned into three sets $A, B, C$ of equal size. Thus, $A \cup B \cup C = S, A \cap B = B \cap C = A \cap C = \phi$. The number of ways to partition $S$ is :
jeemain
math
past papers
2007
4
asked
Nov 29, 2018
by
pady_1
0
answers
In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a :
jeemain
physics
past papers
2006
4
asked
Nov 13, 2018
by
pady_1
0
answers
Let $R = \{ (3,3), (6, 6), (9, 9), (12, 12), (6, 12), (3, 9), (3, 12), (3, 6) \}$ be a relation on the set $A = \{ 3, 6, 9, 12\}$. The relation is :
jeemain
math
past papers
2005
4
asked
Nov 5, 2018
by
pady_1
0
answers
The upper half of an inclined plane with inclination $\phi$ is perfectly smooth, while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom, if the coefficient of friction for the lower half is given by :
jeemain
physics
past papers
2005
4
asked
Nov 5, 2018
by
pady_1
0
answers
If $z = x -i y$ and $z^{\frac{1}{3}} = p + i q$, then $\frac{(\frac{x}{p} + \frac{y}{q})}{(p^2+q^2)}$ is equal to
jeemain
math
past papers
2004
4
asked
Nov 5, 2018
by
pady_1
0
answers
The volume (V) of a monatomic gas varies with its temperature (T), as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to state B, is <br>
neet
physics
past papers
2018
4
asked
Aug 21, 2018
by
pady_1
1
answer
The heating of phenyl-methyl ethers with HI produces
neet
chemistry
past papers
2017
4
asked
Aug 21, 2018
by
pady_1
1
answer
When copper is heated with conc. $HNO_3$ it produces:
neet
chemistry
past papers
2016
4
asked
Aug 21, 2018
by
pady_1
1
answer
The number of structural isomers possible from the molecular formula $C_3H_9N$ is
neet
chemistry
past papers
2015
4
asked
Aug 21, 2018
by
pady_1
1
answer
A system consists of three masses $m_1, m_2$ and $m_3$ connected by a string passing over a pulley $P$. The mass $m_1$ hangs freely and $m_2$ and $m_3$ are on a rough horizontal table (the coefficient of friction= $\mu$). The pulley is frictionless and of negligible mass. The downward acceleration of mass $m_1$ is : (Assume $m_1 = m_2 = m_3 = m$) <br>
neet
physics
past papers
2014
4
asked
Aug 20, 2018
by
pady_1
1
answer
Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2m ? (g is the acceleration due to gravity) <br>
neet
physics
past papers
2013
4
asked
Aug 20, 2018
by
pady_1
1
answer
A particle has initial velocity $\bigg( 2\overrightarrow{i}+3 \overrightarrow{j}\bigg)$ and acceleration $\bigg( 0.3\overrightarrow{i}+0.2 \overrightarrow{j}\bigg)$ .The magnitude of velocity after 10 seconds will be
neet
physics
past papers
2012
4
asked
Aug 20, 2018
by
pady_1
1
answer
A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration $1.0 m/s^2$. If $g = 10 ms^{-2}$, the tension in the supporting cable is :
neet
physics
past papers
2011
4
asked
Aug 16, 2018
by
pady_1
1
answer
Which one of the following statement is FALSE ?
neet
physics
past papers
2010
4
asked
Jul 26, 2018
by
pady_1
1
answer
The mass of lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is :
neet
physics
past papers
2009
4
asked
Jul 26, 2018
by
pady_1
1
answer
The distance travelled by a particle starting from rest and moving with an acceleration $\frac{4}{3}ms^{-2}$, in the third second is
neet
physics
past papers
2008
4
asked
Jul 26, 2018
by
pady_1
1
answer
A particle staring from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are($ \sqrt{3},3$) . The path of the parti makes with the x-axis an angle of:-
neet
physics
past papers
2007
4
asked
Jul 26, 2018
by
pady_1
1
answer
A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency:-
neet
physics
past papers
2006
4
asked
Jul 25, 2018
by
pady_1
1
answer
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45º. The value of C is -
neet
physics
past papers
2005
4
asked
Jul 24, 2018
by
pady_1
1
answer
The unit of permittivity of free space $\epsilon_0$ is :-
neet
physics
past papers
2004
4
asked
Jul 24, 2018
by
pady_1
1
answer
A stationary particle explodes into two particles of masses $m_1$ and $m_2$ which move in opposite directions with velocities $v_1$ and $v_2$. The ratio of their kinetic energies $\frac{E_1}{E_2}$ is :
neet
physics
past papers
2003
4
asked
Jul 24, 2018
by
pady_1
1
answer
For the given incident ray as shown in figure, the condition of total internal reflection of this ray the minimum refractive index of prism will be : - 45º incident ray
neet
physics
past papers
2002
4
asked
Jul 23, 2018
by
pady_1
2
answers
An electron having mass 'm' and kinetic energy E enter in uniform magnetic field B perpendicularly, then its frequency will be :-
neet
physics
past papers
2001
4
asked
Jul 20, 2018
by
pady_1
1
answer
Following logic gate is : <br>
neet
physics
past papers
1998
4
asked
Jun 15, 2018
by
pady_1
1
answer
What will happen if sugar is heated ?
cbsc
class
4
science
olympiad
t1
asked
Nov 17, 2017
by
priyanka.c
1
answer
Pick the odd one out: 5-15-20, 10-30-40, 4-12-15, 25-50-75
class5
math
olympiad
logical
analytical
reasoning
4
asked
Dec 31, 2015
by
pady_1
0
answers
How many lines of symmetry does a rectangle have?
class5
math
olympiad
data handling
4
asked
Dec 31, 2015
by
pady_1
1
answer
Find the area of a rectangle of length 37 mm and breadth 19 mm.
class5
math
olympiad
measurements
4
asked
Dec 31, 2015
by
pady_1
0
answers
Write the answer in short form (decimal number) : $5000 + 700 + 30 + 3 + \large\frac{7}{1000}$
class5
math
olympiad
fractions
decimals
4
asked
Dec 31, 2015
by
pady_1
0
answers
Marlena scored 80\% out of a total of 500 marks. How many marks did he score?
class5
math
olympiad
computation
4
asked
Dec 31, 2015
by
pady_1
0
answers
To see more, click for the
full list of questions
or
popular tags
.
Home
Ask
Tuition
Questions
Practice
Your payment for
is successful.
Continue
...