Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Chemistry

Match the vitamins given in Column I with the deficiency disease they cause given in Column II.

Assertion: Vitamin D can be stored in our body.

Reason: Vitamin D is fat-soluble vitamin.

Which one of the following would feel attraction when placed in magnetic field: Co²⁺, Ag⁺, Ti⁴⁺, Zn²⁺ 

Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion: Magnetic moment values of actinides are lesser than the theoretically predicted values.

Reason: Actinide elements are strongly paramagnetic.

Select the most appropriate answer from the options given below:

Write the equations for the following reaction:

Salicylic acid is treated with acetic anhydride in the presence of conc H₂SO₄

Give a reason for the following observations:

Water soluble vitamins must be taken regularly in the diet.

Assertion (A): Vitamin C cannot be stored in our body.

Reason (R): Vitamin C is fat soluble and is excreted from the body in urine.

The vitamins which can be stored in our body are ______.

What are three types of RNA molecules which perform different functions?

What type of linkage is present in nucleic acids?

Predict the products of the following reactions :

Define the following term: 

Nucleotide

In terms of band theory, what is the difference between a conductor and an insulator?

In terms of band theory, what is the difference between a conductor and a semiconductor?

What are nucleic acids?

How will you bring about the following conversion in not more than two steps?

Benzoic acid to Benzaldehyde

Describe the following:

Decarboxylation

Sea is the greatest source of some halogens. Comment.

Write the reactions involved Decarboxylation reaction

Give reasons for the following:

Electron gain enthalpies of halogens are largely negative.