List of practice Questions

Which of the following is a secondary pollutant ?

World Ozone Day is celebrated on

Natality refers to

Which of the following pairs is wrongly matched ?

Offsets are produced by

Which of the following flowers only once in its life-time ?

Which of the following has proved helpful in preserving pollen as fossils ?

Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes ?

The correct order of steps in Polymerase Chain Reaction (PCR) is

In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is

Plants having little or no secondary growth are

Casparian strips occur in

Secondary xylem and phloem in dicot stem are produced by

Select the wrong statement :

The experimental proof for semiconservative replication of DNA was first shown in a

Select the correct match :

The compound A on treatment with Na gives B, and with PCl₅ gives C. B and C react together to give diethyl ether. A, B and C are in the order

The compound C₇H₈ undergoes the following reactions :

The product ‘C’ is

Identify the major products P, Q and R in the following sequence of reactions :

Which of the following compounds can form a zwitterion ?

Which of the following statements is correct ?

Pneumatophores occur in

Sweet potato is a modified

The correction factor ‘a’ to the ideal gas equation corresponds to