NSO - Mock Test - 2

A lizard is a type of reptile; a daisy is a type of flower. Choices 1 and 2 are incorrect because a petal and a stem are parts of a flower, not types of flowers. Choice 4 is incorrect because bud is a small growth at the tip or on the side of a stem that later develops into a flower, leaf, or branch.

This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.
36 - 2 = 34
34 - 4 = 30
30 - 2 = 28
28 - 4 = 24
24 - 2 = 22

BDS is coded in such a way that all the letters are moving forward by 4 letters.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
H is moving forward by 4 to L.
J is moving forward by 4 to N.
K is moving forward by 4 to O.

The option which is true for the given question is option 1, as Ludhiana is a city and Haryana is a State.

There are two alphabetical series here. The first series is with the first letters only: S, T, U, V, W. The second series involves the remaining letters: CD, EF, GH, IJ, KL So, VIJ is missing term.

Undesirable plants that grow along the crops is known as weeds. The process of removing weeds is known as weeding. Some of the examples of weeds are xanthium, parthenium, etc. 

Option 3 is not an example of traditional method of irrigation. Drip system or drip irrigation has been popular in recent times only. It is a form of irrigation that saves water and fertiliser by allowing water to drip slowly to the roots.

Curd is a dairy product obtained by coagulating milk in a process called curdling. Lactobacillus is a genus of bacteria which can convert sugars into lactic acid by means of fermentation.

Agar, a jelly-like substance obtained from a type of algae (Gelidium), is used in the preparation of ice creams and jellies.

Only the statement (3) is correct because nylon has a greater tensile strength than steel.
All the other options are incorrect.
Nylon is a polyamide and the repeating units are amides not esters.
Nylon does not exhibit the properties of cotton or wool.

Substances which get decomposed through the natural processes, such as action of bacteria, etc, are called biodegradable substances, e.g. potato peels, peels of other vegetable, food stuffs, fruit, paper, cotton cloths, wood, etc.
Plastics are non-biodegradable and cannot be decomposed by bacteria and other microbes.

Zinc gives hydrogen gas along with zinc chloride when it reacts with hydrochloric acid.

Zn + 2HCl → ZnCl₂ + H₂

Copper does not react with dilute sulphuric acid even on heating, but reacts with concentrated sulphuric acid.
Copper, silver and gold are considered as noble metals because of their low reactivity and they do not react with dilute acids.

In the fractional distillation of petroleum, kerosene is collected in the lower part of the fractional column than petrol because kerosene has a higher boiling point than petrol.
Hence, both the statements I and II are correct but the statement II is not the correct reason for I.

About 300 millions year ago, dense forest in low lying lands of the earth got buried because of many natural processes. In a due course of time, they sank deeper and deeper. Beneath the earth, under the geothermal conditions of high pressure and temperature, they slowly converted into coal.
This slow process of conversion of dead vegetation into coal is called carbonisation.

The periods of rotation and revolution are the same in case of the moon. This means that the moon takes the same time in completing one rotation and one revolution. Due to this, only one surface of the moon is visible from the earth. Phases of the moon occur because we can see only that part of the moon which reflects light towards us. Moon does not produce its own light. We are able to see the moon because the sunlight falling on it gets reflected towards us. Thus, we see only that part of the moon from which the light of the sun gets reflected towards us.

Sulphur dioxide is an air pollutant which is added to the atmosphere by combustion of coal and other fossil fuels.
It is a major cause of acid rain and smog and also causes respiratory problems.

Metals react with acids and pickles are acidic in nature.
Hence, lemon pickle should not be stored in aluminium utensils as it would react with the metal to produce toxic substances..

Migratory birds fly far away to other places due to climatic changes, so as to prevent them from extreme climatic conditions of that place.

Red Data Book is the source book which keeps a record of all endangered animals and plants.

Elephant is not an example of endangered species.

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

Venus appears in the western sky after sunset and is called the evening star. As it does so, it changes from the "Evening Star", visible after sunset, to the "Morning Star", visible before sunrise. Although Mercury, the other inferior planet, reaches a maximum elongation of only 28° and is often difficult to discern in twilight, Venus is hard to miss when it is at its brightest.

Larynx is situated at the upper end of the windpipe. There are two stretched membranes attached in larynx; with a narrow slit between them. When air passes through those stretched membranes, they produce different types of sounds with different combinations of stretching.

A rough surface produces greater friction as compared to a smooth surface and a heavier object exerts a greater frictional force.
So,
1.The carpet produces greater frictional force than the tiled surface,
2.We are more likely to slip while walking on a wet floor
3.A bigger and heavier box is more difficult to be moved than a smaller and lighter box.

Sometimes, it is necessary to reduce the undesirable friction. Lubricants make a thin layer over the surface and facilitate easy movement. In the engines of vehicles, use of lubricants increases the efficiency as parts are not rubbed directly over one another because of the thin layer of the lubricant. In many machines, graphite powder or air is used as a lubricant.

The non-luminous (outermost) part of the flame is the hottest, on account of complete combustion of the fuel in this zone.
The luminous (Yellow, middle) part of the flame is less hot due to incomplete combustion.
Since Abida has kept the beaker in the luminous zone of the flame, the beaker will take more time to get heated.
On the other hand, Ramesh has kept the beaker in the non-luminous zone of the flame, so his beaker will be heated in shorter time.

L.P.G is an odourless gas by itself. However, it is mixed with a foul smelling mercaptane gas so that any leakage can be detected by the smell.
Hence, statement I is incorrect.
L.P.G undergoes rapid combustion, not spontaneous combustion.

All combustion processes require oxygen as a supporter of combustion and air is a mixture of gases with 21% oxygen in it.
Hence, air is a supporter of combustion and is essential for the process.

Forces are measured in units called Newtons (N).

The option which is not a conductor is vegetable oil. Vegetable oil is not a good solvent. This means that there are not many ions in vegetable oil, so there is no easy path for electricity to flow.

Electroplating is the process of plating one metal onto another by hydrolysis, most commonly for decorative purposes or to prevent corrosion of a metal. So, this is an application used in daily life to prevent rusting.

The point on the Earth's surface vertically above the focus of an earthquake is known as the epicentre. It is the area suffering the greatest damage.

In an electrical installation or an electricity supply system, an earthing system or grounding system connects specific parts of that installation with the Earth's conductive surface for safety and functional purposes.

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure is the pressure relative to the ambient pressure. Various units are used to express pressure. When you apply force on an inflated balloon using your hand from both sides, the force of pressure changes the shape of the balloon.

Non-contact forces are those forces which result even when the two interacting objects are not in physical contact with each other, and yet are able to exert a push or pull despite their physical separation. Examples of non-contact forces include gravitational forces.

The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organised as DNA molecules, along with a variety of proteins, to form chromosomes.

Pituitary gland is about the size of a pea and is situated in a bony hollow, just behind the bridge of the nose. It is attached to the base of your brain by a thin stalk. The pituitary gland is often called the master gland because it controls several other hormone glands in our body, including the thyroid and adrenals, the ovaries and testicles.

A zygote is an eukaryotic cell formed by a fertilisation event between two gametes. The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information necessary to form a new individual. An individual is formed from a zygote which is a result of fusion of sperm from father and ovum from mother. Hence, it inherits some characteristics of father and some of mother.

The metal used for making engines is iron.
The metal used for making electric wires is copper, as copper is light in weight and also a good conductor of electricity.
The substance used as a fuel is carbon.
The metal used in thermometers is mercury.
The metal used in aircraft is titanium.

The causative organisms of cholera and typhoid are bacteria, while virus causes chicken pox and polio. Protozoa cause malaria.