NPSC: i) General Science

A study involving 2,813 species of tetrapod vertebrates shows that island-dwelling species have slower relative metabolic rates than their mainland counterparts. This phenomenon is called 'island syndrome' which could be ascribed to the fact that ________

When an iron nail is left exposed to a humid atmosphere it gets rusted. This rusting ________.

What is the product of daily domestic use that results from the chemical reaction represented by the equation Na + Cl = NaCl (Sodium Chloride)?

We know that dissolved sodium chloride can be separated from water by the physical process of evaporation. Which of the following statements also holds true?

Brass is a mixture of which of the following pairs of metals?

During a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is known as the

Just after you have combed your dry hair using a plastic comb, the comb can attract small pieces of paper. What causes this to happen?

Absorption of water from the ground by plant roots is an example of

The process of blood clotting which helps prevent non-stop bleeding from cut or wounded blood vessels is called

At room temperature, which of the following items should float when poured/put into a bucket of water? i. Ice ii. Oil iii. Honey

Which of the following statements about gravitational forces are true? i. The weight of a body is due to the gravitational force of the earth acting on it. ii. The force of gravity decreases with altitude. iii. The force of gravity could be different at different places on the surface of the earth. iv. Gravitation force is equal regardless of the masses of the objects that are involved.

In scientific terms there is no “work” being done in which of the following? i. Food grains in a tray kept on the window sill are getting dried in the sun ii. A green plant is carrying out photosynthesis iii. A person is swimming from one end of a pool to the other

A speed that is five times faster than the speed of sound, or even faster, is called?

Organic farming is a farming system with minimal or nil use of ________ made with synthetic chemicals. i. Fertilizers ii. Herbicides iii. Pesticides

Which of the following type of nutrients forms the major structural component of cells and is responsible for the building and repair of body tissues?

What is the gas used to flush bags of packaged foods such as potato chips to prevent the oxidation of the food items?

Acid rain primarily consists of which of the following pairs of acids?

Pure gold, known as 24 carat gold, is very soft and not suitable for making jewellery. Hence, it is alloyed with either ______ or ______ to make it hard enough to be used for making jewellery.

Non-metals are bad conductors of heat and electricity, except for ______, which conducts electricity.

______ is the active ingredient of all alcoholic drinks and is also used in the manufacture of medicines such as tincture iodine, cough syrups, and many tonics.

Naturally synthesized carbohydrates are utilized for providing energy to plants. The carbohydrates which are not used immediately are stored in the form of starch, which serves as the internal energy reserve to be used as and when required by the plants. A somewhat similar situation is seen in humans where some of the energy derived from the food that we eat is stored in our body in the form of ______.

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

Blood pressure in humans is the force that blood flowing through the body exerts against the wall of a vessel. Which of the following statements about blood pressure holds true?

Which of the following organs of a person cannot be donated for the purpose of transplanting it into another person?

Which of the following statements is/are true about reproduction in organisms? i. Reproduction, unlike other life processes, is not essential to maintain the life of an individual organism. ii. Reproduction can be either sexual or asexual. iii. Roots, stems and leaves of some plants develop into new plants through vegetative propagation.

In our houses we get an AC electric power supply through a set of wires. The wires used for this supply have red, black and green insulation. The wire with red insulation is called ______.