NSO - Mock Test - 3

A bike runs on petrol. Similarly, an air conditioner runs on electricity.

The code of different letters is given below as:
L -- !
I -- @
N --- #
G --- $
E --- %
R ----- &
Similarly, we can find out the code for GINGER.
GINGER = $@#$%&

Every next letter for the corresponding term is obtained after getting two jumps in the original term.
A + 2 = C
B + 2 = D
C + 2 = E

Similarly,
M + 2 = O
N + 2 = P
O + 2 = Q

Silk is obtained from silk worm; similarly, wool is obtained from sheep.

B and D are siblings, so A and C are husband and wife.
M is the paternal uncle of D and hence, the brother of D's father, who is A.

Inder, Mohan, John, Raman, Jack
From the given arrangement, Raman is sitting second to the right of Mohan.

After rearranging the given letters, we get

Y L A T I = I T A L Y; which is a country.

Two miscible liquids can be separated by the process of distillation.
This method of separation is based on the difference in the boiling points of the components of the mixture.

The motion described by a simple pendulum is called oscillatory motion as it moves back and forth.

Speed of light in air is about 3,00,000 km/s. Light travel faster than sound, jet aeroplane, and supersonic plane.

Glass is not a conductor, while copper wire, sea water, and graphite are conductors of electricity.

Heating and dropping a magnet may demagnetise the magnet to lose its magnetic property.

At 4^oC, the density of water is maximum.

Jute grows best during the rainy season. Hence, cultivation is done prior to the rainy season and the harvesting begins after the rainy season, i.e., around July and continues till October.

Mustard oil and water are immiscible and the mixture can be separated by decantation using a separating funnel.

When a body covers equal distance in equal interval of time, the motion of a body is called uniform motion.

The instrument used to see above the water surface from submarine is called periscope.

When an electrician repairs electric line, he wears rubber gloves as rubber is a bad conductor of electric current and prevents him from electric shock.

North pole of a magnet can be identified by another magnet having marked north and south poles by attracting or repelling it.

Both the processes are chemical changes as the change cannot be reversed.

The process of separating out seeds from the cotton fibre is called ginning.

Since there is a difference in the size of the rice grains and the salt crystals, sieving is the best and the most convenient method to separate them.

Alternately, since rice is insoluble and salt is soluble in water the mixture may be added to water and then rice can be separated by filtration using a filter paper and then salt can be separated by evaporation.
However, this is not the best option.

Iron displaces copper from the sulphate solution leading to the formation of ferrous sulphate and copper.

CuSO₄ + Fe → FeSO₄ + Cu
The blue colour of the solution changes to pale green and there is a reddish-brown deposit of copper on the piece of iron.
This is a displacement reaction in which a more reactive metal displaces a less reactive metal from its salt solution.

Light travels in straight lines. It cannot bend. This phenomenon is known as rectilinear propagation of light.

Rubber, glass and plastic are insulators, but graphite is good conductor of electricity.

A freely suspended magnet always aligns in N-S direction having North Pole towards north and South Pole towards south.

Presence of both moisture and oxygen is required for rusting of iron.
Rusting will not occur in the absence of any one or both of these conditions.

Sheep is reared for wool, which is a proteinaceous fibre present as the body hair on the animal.

Two or more liquids which mix with each other and do not form separate layers are called miscible liquids.

The motion of a simple pendulum is known as periodic motion, motion repeated in equal intervals of time.

Light always travels in a straight line. This property is called rectilinear propagation of light.

Inside the torch, two or more cells are placed with positive – negative – positive – negative terminals to power the torch, else with any other arrangement, it won't work.

When a bar magnet is cut into two pieces, then each piece will have its own poles.

Burning of a candle is an example of both a physical and a chemical change.
Burning of the paraffin wax is a chemical change as a new substances (carbon dioxide + water vapour) are formed along with the release of energy as heat and light.
However, melting of wax is a physical change.

We use woollen clothes in winter as woollen fibres trap a lot of air which is a poor conductor of heat and prevents the body heat from escaping.

Petrol, kerosene and other petroleum products are separated by the process of fractional distillation using a fractional column.

From a burning candle , the light rays starts from a point and travel in various directions,so the light rays are divergent.

A weathercock shows the direction in which the air is moving at that place.

Substances which are not attracted by a magnet are called non-magnetic substances. Iron, cobalt and nickel are all magnetic substances and are attracted by a magnet.

All of the given substances are soluble in water and are called solute. Solute is the substance which is dissolved in a solvent.

During night, Moon appears shining although it is not a luminous body because it reflects the sunlight.

Stems have four main functions: Support for and the elevation of leaves, flowers and fruits, keep the leaves in the light and provide a place for the plant to keep its flowers and fruits.

A root has four major functions: Absorption of water and inorganic nutrients, anchoring of the plant body to the ground, and supporting it, storage of food and nutrients, and vegetative reproduction.

The function of leaves is to help the plant to produce food by converting the energy in sunlight into chemical energy that the plant can eat.

So, only leaves are matched incorrectly.

Cotton grows best in black deep soil.
Cotton, jute, flax, hemp, coir and ramie are all fibres which are gained from plants.
Fabric is made from yarn by either weaving or knitting.
Hence, the statements 1,2 and 3 are correct

Alluvial soil is good for cotton as well.
The spinning of fibres increases the strength of the yarn.
Hence, the statements 4 and 5 are incorrect