List of practice Questions

BrF3 self ionizes as following
The molecular shapes of SF4,CF4 and XeF4 are
A magnetic field of (10-4\(\hat{k}\))T exerts a force of (4\(\hat{i}\)-3\(\hat{j}\))x10-12N on a particle having a charge of 10-9 C. The speed of the particle is:
The correct statement about the magnetic properties of [Fe(CN)6]3- and [FeF6]3- is
The species in which nitrogen atom is in a state of sp hybridisation is

The equivalent weight of KIO3 in the given reaction is (M=molecular mass) :
2Cr(OH)3 + 4OH + KIO3 → 2CrO42- + 5H2O +KI

A solution containing 4g of polymer in a 4.0-litre solution at 27°C shows an osmotic pressure of 3.0×10-4 atm. The molar mass of the polymer in g/mol is

Let the system of linear equations
$-x + 2y - 9z = 7$,
$-x + 3y + 72 = 9$,
$-2x + y + 5z = 8$,
$-3x + y + 13z = \lambda$
has a unique solution $x = \alpha, y = \beta, z = \gamma$. Then the distance of the point $(\alpha, \beta, \gamma)$ from the plane $2x - 2y + z = \lambda$ is:

Suppose a gaseous mixture of He,Ne,Ar and Kr is irradiated with photons of the frequency appropriate to ionize Ar,What ion(s) will be present in the mixture?
A 28-year-old woman with a history of multiple sexual partners presents with lower abdominal pain for 1 month. She experiences minimal discharge and complaints of intermenstrual bleeding. What is the most likely cause ?
If in the case of a radio-isotope, the value of half-life(T1/2) and decay constant(λ) are identical in magnitude, then their value should be
Na2CO3 is prepared by Solvay process but K2CO3 can not be prepared by the same because
Which of the following would give a linear plot? (K is the rate constant of an elementary reaction and T is the temperature in absolute scale)
For the reaction A+B\(\rightarrow\)C, we have the following data:
Initial concentration of A(in molarity)Initial concentration of B (in molarity)Rate(initial)(Relevant unit)
110100
111
10110








The order of the reaction with respect to A and B are:
The equivalent conductance of NaCl, HCl, and CH3COONa at infinite dilution are 126.45, 426.16, and 91 ohm-1cm2eq-1 respectively at 25°C. The equivalent conductance of acetic acid(at infinite dilution) would be
Arrange the following in order of increasing mass :
(i) 1 mole of N2, (ii) 0.5 mole of O3, (iii) \(3.011×10^{23}\) molecules of O2, (iv) 0.5 gram atom of O2
The root mean square(rms) speed of X2 gas is x m/s at a given temperature. When the temperature is doubled, the X2 molecules dissociated completely into atoms. The root mean square speed of the sample of gas then becomes (in m/s)
What is the edge length of the unit cell of a body-centred cubic crystal of an element whose atomic radius is 75 pm?
Two base balls(masses; m1=100g, and m2=50g) are thrown. Both move with uniform velocity, but the velocity of m2 is 1.5 times that of m1.The ration of de Broglie wavelengths λ(m1) : λ(m2) is given by
A charged particle of charge q and mass m is placed at a distance 2R from the center of a vertical cylindrical region of radius R where the magnetic field varies as \(\vec{B}=(4t^2-2t+6)k\), where t is time. Then which of the following statement(s) is/are true?
The four bands of a colour coded resistor are of the colours gray, red, gold and gold. The value of the resistance of the resistor is
The figure shows two identical parallel plate capacitors A and B of capacitances C connected to a battery. The key K is initially closed. The switch is now opened and the free spaces between the plates of the capacitors are filled with a dielectric constant 3. Then which of the following statement(s) is/are true?
two identical parallel plate capacitors
There are n elastic balls placed on a smooth horizontal plane. The masses of the balls are m,\(\frac{m}{2}\),\(\frac{m}{2^2}\)........\(\frac{m}{2^{n-1}}\) respectively. If the first ball hits the second ball with velocity V0, then the velocity of the nth ball will be,
A modified gravitational potential is given by \(V=-\frac{GM}{r}+\frac{A}{r^2}\). If the constant A is expressed in terms of gravitational constant (G), Mass(M) and velocity of light (c), then from dimensional analysis, A is,
An amount of charge Q passes through a coil of resistance R.If the current in the coil decreases to zero at a uniform rate during time T, then the amount of heat generated in the coil will be,