UPPSC PCS 2020: General Science Quiz 5

With reference to Neem tree, consider the following statements:
(1). Neem oil can be used as a pesticide to control the proliferation of some species of insects and mites.
(2). Neem seeds are used in the manufacture of biofuels and hospital detergents.
(3). Neem oil has applications in pharmaceutical industry.
Which of the statements given above is/are correct?

Which of the following statements is / are correct regarding vegetative propagation of plants?
(1). Vegetative propagation produces clonal population.
(2). Vegetative propagation helps in eliminating the virus.
(3). Vegetative propagation can be practiced most of the year.
Select the correct answer using the code given below.

Which of the following is/are the example/examples of chemical change?
(1). Crystallization of sodium chloride
(2). Melting of ice
(3). Souring of milk
Select the correct answer using the code given below.

Consider the following statements :
(1). Maize can be used for the production of starch.
(2). Oil extracted from maize can be a feedstock for biodiesel.
(3). Alcoholic beverages can be produced by using maize.
Which of the statements given above is/are correct?