List of top Questions asked in OJEE

Let \( A \) be a square matrix of order 3 and \( |A| \) denote the determinant of \( A \). If \( A = kB \), where \( k \) is a scalar, then \( |A| \) is equal to
The system of equations \( 3x + 5y = 4 \); \( 6x + ky = 8 \) has infinitely many solutions if \( k \) is equal to
The value of \( k \) for which the system of equations \( x + ky + 3z = 0 \); \( 3x + ky + 2z = 0 \); \( 2x + 3y + 4z = 0 \) has a non-trivial solution is
Among the following complex ions, the one which is EPR active is:
The asymmetric nature of the visible absorption band of \( [\text{Ti(H}_2\text{O})_6]^{3+ \) is due to}
Which of the following will have the lower CO stretching frequency?
The alkali metals dissolve in liquid ammonia, it is found that
The pair of compounds having the same hybridization for the central atom is:
One mole of a monatomic ideal gas is expanded by a process described by \( PV^3 = C \), where \( C \) is a constant. The heat capacity of the gas during the process is given by (R is the gas constant)
An unpolarized beam of intensity \( I_0 \) is incident on a pair of Nicol’s prism making an angle of 60 degrees with each other. The intensity of the light emerging from the pair is
The dimensions of the area \( A \) of a black hole can be written in terms of the universal constant \( G \), its mass \( M \), and the speed of light \( c \) as \( A = G^\alpha M^\beta c^\gamma \). Here
One mole of a monatomic ideal gas is expanded by a process described by \( PV^3 = C \), where \( C \) is a constant. The heat capacity of the gas during the process is given by (R is the gas constant)
A certain p-n junction, having a depletion region of width 20mm was found to have a breakdown voltage of 100V. If the width of the depletion region is reduced to 1 mm during its production, then it can be used as a Zener diode for voltage regulation of
Teratogenicity is caused by
Ball mill works on the following principle
A fine powder generally pass through this sieve number as per IP
For drying of heat sensitive materials, this particular type of dryer is used
The mechanism of killing of bacteria in autoclaving process is
Enteric coating is done with the following material
Titanium dioxide in gelatin mass components of capsule is a
The adult dose of a drug is 200mg. What is the dose for a child of 12 years as per Dilling’s formula?
Identify the diffusible substance for mixtures preparation
What is the HLB value of emulsifying agent in order to prepare w/o type of emulsion?
Which is the correct proportion of oil, water, gum for preparation of primary emulsion using mineral oil
Calciferol is the name of