List of practice Questions

Opening and closing of stomata is due to the :-

Which of the following is diamagnetic?

In which of the solutions containing following solutes, its normality is equal to its molarity?

Two plane mirrors A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle $30^\circ$ at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is

$N_{2}$ and $CO$ are:

Which of the following is the strongest Lewis acid?

Which one of the following in presence of sunlight will react with chlorine to give benzyl chloride?

Which of the following has maximum unpaired electrons?

Non-Ianthanide element is:

Which of the following is a Lewis base?

Which of the following non-metal possesses the atomicity half that of sulphur?

An accurate and reliable audio oscillator is used to standardize a tuning fork marked as 512 Hz. When the oscillator reading is 514 two beats are heard per second. When the oscillator reading is 510, the beat frequency is 6 Hz. The frequency of the tuning fork is:

Which of the following is not a proposition.

How many 'd' electrons are present in $Cr^{2+}$ ion ?

A and B are two conductors carrying a current I in the same direction, $x$ and $y$ are two electron beams moving in the same direction.

A superconductor exhibits perfect

A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed are

To convert a galvanometer into a voltmeter one should connect a : -

The SI unit of radioactivity is

The variation of the intensity of magnetisation (I) with respect to the magnetising field (H) in a diamagnetic substance is described by the graph