List of practice Questions

Young?? modulus of the wire depends on

Young's modulus of steel is $1.9 \times 10^{11}\, N \,m^{-2}$. When expressed in $CGS$ units of dynes $cm^{-2}$, it will be equal to ($1 \,N = 10^5$ dyne, $1\, m^2 = 10^4\, cm^2$)

You are given two spheres of same material and radii $10\,cm$ and $20\, cm$. They are heated to the same temperature. They are placed in the same environment. The ratio of their rates of cooling will be

You are given four sources of light each one providing a light of a single colour - red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is $90^{\circ}$. Which of the following statements is correct, if the source of yellow light is replaced with that of other lights without changing the angle of incidence?

Zeta potential (or electrokinetic potential) is the

Zero error, instrumental error and personal errors can be respectively of group

$Z = 7x + y$, subject to $5x + y \ge 5, x + y \ge 3, x \ge 0, y \ge 0$. The minimum value of Z occurs at

Youngs's modulus for perfectly plastic body is

A person moves 30 m north, from there 20m east and finally $30\sqrt{2}$ m south-west from there His displacement from initial position is.

Zygotene of prophase-l is characterised by

Zone refining is used for the

Zone refining is based on the principle that _________.

Which of the following fibres are made of polyamides ?

Which of the following floral formulae corresponds to Family Liliaceae ?

Which of the following forests is known as the 'lungs of the planet earth' ?

Which of the following fluoride of xenon has zero dipole moment?

Which of the following forms a colloidal solution in water ?

Which of the following exhibits the weakest inter molecular forces ?

Which of the following expressions are meaningfull operations?

Which of the following facts about the complex $[Cr(NH_{3})_{6}]Cl_{3}$ is wrong?

Which of the following elements is most metallic ?

Which of the following elements when added as an impurity into the germanium produces a p-type semiconductor?

Which of the following equations is correct?

Which of the following element represents highly electropositive as well as highly electronegative element in its period ?

Which of the following elements can be involved in $p\pi-d\,\pi$ bonding?