CUET Free MOCK Test of Chemistry: Check knowledge for upcoming exam 2026

Occupying groups 3 to 12 in the d-block of the periodic table, these elements have partially filled d-orbitals. This characteristic endows them with unique properties, including the ability to exist in multiple oxidation states, forming colored ions, acting as catalysts in reactions, and exhibiting paramagnetic behavior (attracting magnets).
Inner transition metals: These metals consist of two series, the lanthanoids (4f orbitals) and actinoids (5f orbitals). They are found at the bottom of the periodic table, separate from the main d-block. Interestingly, lanthanoids tend to be more similar to each other than typical transition elements within a group.
Q: The primary factor attributing the catalytic activity of transition metals and their compounds is---

Complete hydrolysis of DNA does not yield.

In aldehydes, the carbonyl group is attached to a carbon and a hydrogen, whereas in ketones, it is attached to two carbon atoms. Carboxylic acids and their derivatives are carbonyl compounds in which the carbonyl group is bonded to oxygen.

Which one of the following ligands forms a chelate?

Samples of benzaldehyde and acetaldehyde can be distinguished by using

A solution of copper sulphate cannot be stored in zinc vessel because

Following is a property of p-type semiconductor

Sulphur molecule at room temperature is

Occupying groups 3 to 12 in the d-block of the periodic table, these elements have partially filled d-orbitals. This characteristic endows them with unique properties, including the ability to exist in multiple oxidation states, forming colored ions, acting as catalysts in reactions, and exhibiting paramagnetic behavior (attracting magnets).
Inner transition metals: These metals consist of two series, the lanthanoids (4f orbitals) and actinoids (5f orbitals). They are found at the bottom of the periodic table, separate from the main d-block. Interestingly, lanthanoids tend to be more similar to each other than typical transition elements within a group.
Q: Highest oxidation state of manganese in fluoride is +4 (MnF₄) but highest oxidation state in oxides is +7 (Mn₂O₇) because

Since physisorption arises mainly because of van der Waals forces, it means adsorption is : (pick the incorrect option)

What amount of bromine will be required to convert 6 g of phenol into 2,4,6-tribromophenol?

Which aldehyde is used to preserve biological specimens?

Given below are the steps involved in the process of zone refining for removing impurities which are more soluble in the melt than solid state of the metal.
A. Impurities get concentrated at one end.
B. As the heater moves forward, the pure metal crystallises out of the melt left behind and the impurities pass to the next zone.
C. A mobile heater surrounding the rod of impure metal is fixed at its one end.
D. The end is cut off.
E. The molten zone moves along with the heater which is moved forward.
Choose the correct answer from the options given below:

The compounds formed by elements of group-15, 16, and 17 with hydrogen have general formulas MH3, H2M, and HX (known as hydrogen halides). Down the group, the stability of these hydrides decreases, as does the strength of the M-H bond and their basic nature. The boiling point of these hydrides is primarily determined by the intensity of their intermolecular forces.
Bond angle (HMH) among hydrides of group-16 decrease down the group because:

The compounds formed by elements of group-15, 16, and 17 with hydrogen have general formulas MH3, H2M, and HX (known as hydrogen halides). Down the group, the stability of these hydrides decreases, as does the strength of the M-H bond and their basic nature. The boiling point of these hydrides is primarily determined by the intensity of their intermolecular forces.

Chlorine is obtained from brine through the process of:

Which of the following hormones is produced under the condition of stress which simulates glycogenolysis in the liver of human beings?

In aldehydes, the carbonyl group is attached to a carbon and a hydrogen, whereas in ketones, it is attached to two carbon atoms. Carboxylic acids and their derivatives are carbonyl compounds in which the carbonyl group is bonded to oxygen.

Pentan-2-one and pentan-3-one can be distinguished by

Occupying groups 3 to 12 in the d-block of the periodic table, these elements have partially filled d-orbitals. This characteristic endows them with unique properties, including the ability to exist in multiple oxidation states, forming colored ions, acting as catalysts in reactions, and exhibiting paramagnetic behavior (attracting magnets).
Inner transition metals: These metals consist of two series, the lanthanoids (4f orbitals) and actinoids (5f orbitals). They are found at the bottom of the periodic table, separate from the main d-block. Interestingly, lanthanoids tend to be more similar to each other than typical transition elements within a group.
Q: The bonds present in the structure of dichromate ion are

Which of the following are the characteristics of chemisorption?
A. Highly specific in nature
B. Low activation energy
C. High heat of adsorption
D. Reversible in nature
Choose the correct answer from the options given below:

The purest form of commercial iron is

Amalgam of mercury with sodium belongs to which solute-solvent combination.

In aldehydes, the carbonyl group is attached to a carbon and a hydrogen, whereas in ketones, it is attached to two carbon atoms. Carboxylic acids and their derivatives are carbonyl compounds in which the carbonyl group is bonded to oxygen.

Helium and element ‘X’ have outer electron configuration of ns2. Identify the element ‘X’.

Aspartame is used in cold foods and soft drinks even though it is roughly 100 times as sweet as cane sugar and can pose a health hazard because:

In a pure crystal, lattice points cannot be occupied by which of the following?