NSO - Mock Test - 1

Except Venus and Mercury, all the other planets have their natural satellites. So, Venus is the odd one among the given options.

The relation here is n : n² + 1
5 : 5² + 1 = 26
7 : 7² + 1 = 50

JAGUAR is coded as KBFTBS. First two letters are coded by their successors in the English alphabet, third and fourth letter are coded by their predecessors in the alphabet, and the last two letters are coded by their successors in the alphabet.
C + 1 = D
H + 1 = I
I – 1 = H
T – 1 = S
A + 1 = B
L + 1 = M

The pattern is + 8, + 4, + 8, + 4, ......
7 + 8 = 15
15 + 4 = 19
19 + 8 = 27
27 + 4 = 31 - Missing term
31 + 8 = 39
39 + 4 = 43

Around 60-65 countries in the world produce sesame seeds. From among the options given above, sesame is a major semi-Rabi crop in India.

In the Indian sub-continent, the crops grown on irrigated lands which do not have to wait for monsoons, or in the short duration between Rabi and Kharif crop seasons, mainly from March to June, are called Zaid crops.

Wheat-leaf rust is a fungal disease that affects wheat. The fungus is an obligate parasite, which is capable of producing infectious urediniospores as long as infected leaf tissue remains alive.

All the multicellular organisms start their lives as a single cell.
Nucleolus is situated inside the nucleus.
Cell membrane is responsible for providing structure to a cell.

Terylene is used to make very fine yarn by which various dress materials are made. Terylene is an artificial textile fibre made from polyester and is used to make light, crease-resistant clothing.

The reason why handles of screwdrivers are made of plastic is that plastics are poor conductors of both heat and electricity.

Actually, metalloids are metallic-looking brittle solids. They have properties between those of metals and non-metals. They tend to share electrons when they react with other substances and have weakly acidic or amphoteric oxides, and are usually found naturally in combined states.

Sulphur is a polyatomic non-metal.

Coal tar is a black, thick liquid with unpleasant smell. It is a mixture of about 200 substances. Products obtained from coal tar are used as starting materials for manufacturing various substances used in everyday life and in industry. So, among the options given above, it is the perfumes which can be obtained from coal tar.

Paraffin wax is used to make ointments. It is used as a barrier cream by providing a layer of oil on the surface of the skin to prevent water evaporating from the skin surface. It is an emollient, sometimes known as skin lubricant. It is used to soothe, smooth and hydrate the skin.

All the options given above are characteristics of a good fuel, except that it cannot produce a large amount of heat which is not true.

Weeds are the unwanted plants growing along crops. They share the nutrients meant for plants and thus are harmful for crops. We can control weeds with the help of chemicals weedicides. The removal of weeds is called weeding. They are either removed manually or by chemicals. Manually this can be done with the help of Khurpi or Seed-drill. Weedicides are sprayed in the fields to kill the unwanted plants. These weedicides do not affect the main crop. Weeds are removed or killed during their vegetative phase before flowering or bearing of seeds.

Diana, Dave and Cameron are finding difficulty in burning a heap of green leaves because it contains a lot of water and has a very high ignition temperature. As water is a natural fire extinguisher, it does not allow leaves to catch fire easily.

The largest threat to wildlife is over-exploitation of resources, which means exploitation of wild populations for food has resulted in population crashes, for example, over-fishing and over-grazing. It happens due to the extreme growing indifference of the public to the wildlife conservation and environmental issues.

The aim of the United Nations Educational, Scientific and Cultural Organisation is to provide an intellectual framework and practical guidance for conservation actions.

'Worldwide Fund for Nature' is an international non-governmental organisation working on issues regarding the conservation, research and restoration of the environment. This organisation is supporting around 1300 conservation and environmental projects around the world.

The largest gland in the human body is liver. It is also the largest (internal) organ in our body and can weigh up to 1.5-1.6 kg for a human adult.

The inner walls of the small intestine have thousands of finger-like outgrowths. These are called villi .

The sum of potential energy and kinetic energy is the total mechanical energy of the object falling from a height.
During free fall of the object, the potential energy starts decreasing and converting into kinetic energy with decrease of height from the ground.

Yeast is used in the production of alcohol.

Buoyancy is an upward force exerted by fluid that opposes the weight of an immersed object. That is why when a bucket full of water is drowned in water, its weight becomes less than before.

Surface tension is the elastic tendency of a fluid surface which makes it acquire the least surface area possible. So, small liquid drops are spherical in shape.

The sound produced by a sitar and a flute can be distinguished from each other when the same note is played on both of them because they are constructed of different materials (wood/brass) and use different mediums to create sound (strings/air). A sitar string vibrates to create sound, whereas air is blown into flute to produce sound.

Pepsin is an enzyme that breaks down proteins into smaller peptides. It is produced in the stomach and is one of the main digestive enzymes in the digestive system.

The loudness of sound is measured in unit called decibel (dB). A decibel unit expresses the relative intensity of sounds on a scale from zero for the average least perceptible sound to about 100 dB.

When a human body speaks, the voice box present in the neck of the body has a part called larynx which contains a vocal cord that starts vibrating when our body speaks or while talking to somebody.

Substances which do not allow electric current to pass through them are called insulators; such as plastic material used to manufacture a golf ball outer is an excellent example of plastic being used as insulator.

When electric current is passed through water, water dissociates into hydrogen and oxygen. Hydrogen is deposited over negative pole and oxygen is deposited over positive pole. Deposition of hydrogen and oxygen at different poles is visible in the form of bubbles.

Ducking under a table or desk is the quickest way to protect yourself. If you are in a high rise building, and away from a table or desk, move against a wall. Ducking under a table or desk is one of the preventive measures which can be taken at the time of an earthquake.

A charged object attracts an uncharged object: Take a ball pen refill and rub it against a woollen cloth. Bring this refill near bits of paper. It is observed that the refill attracts the bits of paper. This activity shows that a charged object attracts an uncharged object.

Within about 10 days from the New Moon day; the Moon appears as a circle with some portion cut off. This is called the Waxing Gibbous Moon.

The distance between the Sun and the Earth is called one astronomical unit (AU). This unit of distance makes it easy to express the distance of different planets from the Sun.

There are four terrestrial planets: Mercury, Venus, Earth, and Mars. These planets are those closest to the Sun. They are characterised by their dense, rocky composition.

Excess level of CFCs in the atmosphere damages the ozone layer. Ozone layer works like a shield and prevents the harmful ultraviolet radiation from reaching up to the living beings. Any damage in the ozone layer can be very harmful.

In India, this is a common practice to discharge untreated sewage and effluents into the nearest water body. Most of the rivers and ponds in India are highly polluted because of this.

1. The property of metal by which it can be drawn into wires is called ductility. (True)
2. Since metals produce ringing sounds, they are said to be sonorous. (True)
3. When a copper vessel is exposed to moist air for long, it acquires a dull yellow coating. (False)
It acquires a dull green coating, when a copper vessel is exposed to moist air for long.

Petrol is used as a fuel in motor car, aviation and as a solvent for dry cleaning.
Diesel is used as a fuel for heavy vehicles such as trucks, rail engines, for small vehicles such as jeep car, for jet air-crafts, small generators, etc.
Kerosene is used as a fuel for stoves, jet air-crafts and lamps, etc.
Bitumen is used in making of paints and roads, etc.

Drag - The frictional force exerted by fluids
Rolling friction - The force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface
Static friction - The friction that exists between a stationary object and the surface on which it is resting
Sliding friction - The resistance created by any two objects when sliding against each other