List of top Questions asked in JEECUP- 2024

In which of the following compounds does the oxidation number of oxygen equal +2?
Hardness of water is due to the presence of:
Detergents are the salt of:
Among the following, which is an ionic hydride?
The rate of diffusion of a gas is \( r \) and its density is \( d \), then under similar conditions of pressure and temperature:
Real gas behaves like an ideal gas at:
Which catalyst is used in oxidizing \( NH_3 \) in Ostwald's process?
Amount of copper deposited on the cathode of an electrolytic cell containing copper sulphate solution by the passage of 2 amperes for 30 minutes (At. mass of Cu = 63.5):
Which of the following order of ionic radii is correctly represented?
An example of thermosetting plastic is:
Hydrocarbon used for welding purposes is:
Which of the following types of drugs reduces fever?
In the following reaction: \[ SO_2 + 2H_2S \rightarrow 3S + 2H_2O \] Which of the following statements is correct?
Equivalent weight of a dibasic acid is 12. Its molecular weight is:
Essential constituent of an amalgam is:

The IUPAC name of
The IUPAC name of

The common name of 2-Butanone is:
The number of molecules present in 2.8 g of nitrogen is:
The half-life period of a radioactive element is 150 days. After 600 days, 1 gm of the element will be reduced to:
Which among the following pairs are not having the same number of total electrons?
Electronic configuration of copper can be represented as:
A wooden block of mass 6 kg is pulled across a rough surface by a 54 N force against a friction force \( F \). The acceleration of the block is \( 6 \, \text{m/s}^2 \). Then the value of friction force \( F \) is:
A body weighs 75 gm in air, 51 gm when completely immersed in an unknown liquid and 67 gm when completely immersed in water. Find the density of the unknown liquid:
An object is placed in front of a convex lens of focal length 12 cm. If the size of the real image formed is half the size of the object, then the distance of the object from the lens is:
An object of 4.0 cm in size is placed at 25 cm in front of a concave mirror of focal length 15 cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image?