Control and Coordination — Science STD 10 — Question

The gas obtained from biomass for generating heat energy is :

In an ecosystem, primary consumers are :

A doctor advised a person to take injection of insulin because:

The kidneys in human beings are a part of the system for

Assertion (A): Recycling is the way of managing plastic waste.
Reason (R): Broken plastic articles are sent to plastic processing units where they are melted and remoulded to make new plastic articles.

The organic compound prepared by Wohler from an inorganic compound called ammonium cyanate was:

The ten per cent law is associated with :

Pynes system of irrigation are common in.

Choose the incorrect statement:

An aqueous solution 'A' turns the phenolphthalein solution pink. On addition of an aqueous solution 'B' to 'A', the pink colour disappears. Which of the following statement is true for the solutions 'A' and 'B'.