NSO - Mock Test - 4

Total number of persons standing = total persons on left + total persons on right - Sumer's position = 123 + 45 - 1 = 167

18th from top which means 17 people above him.
Let P number of people be after him.
Then Jacky's position from bottom (p + 1)^th.
50 - (17 + 1) = p
p = 32
His position from the bottom (p + 1) = 33^rd.

The pattern is
34 x 2 = 68 – 1 = 67
67 x 2 = 134 – 1 = 133
133 x 2 = 266 – 1 = 265
265 x 2 = 530 – 1 = 529

We drink coffee in a cup and have soup in a bowl. Choices 2 and 3 are incorrect because they are other utensils.

A positively charged body will always attract a negative charge.

Silver halides are used in photographic film and photographic paper, including graphic art film and paper, where silver halide crystals in gelatin are coated on to a film base, glass or paper substrate. Silver fluoride is not used in photography.

Saturn is the planet most far away, in our solar system. Thus it will receive the lowest amount of sunlight from our Sun.

Magnesium reacts with oxygen in the air according to the equation:

2 Mg (s) + O₂ (g) → 2 MgO (s). In the question, the compound incorrectly written is MgO² which should actually be MgO.

Paraffin Wax is used for many types of products such as lipsticks, baby products and makeup products.

Wheat is one of the examples of a Rabi crop. Rabi crops are sown in winter and are harvested in the spring.

Blue green algae is a type of bacteria which is used to fix atmospheric nitrogen in soil.

Cellulose is good for paper. So more the cellulose, more fine the paper will be.

It is the scientific name of mango which is not a of micro organism.

Decibel (dB) is the measure of the intensity of sound.

Shelter can be obtained from wood but not from wood pulp.

Diarrhea can be caused by parasitic infection, bacterial infection, viral infection, functional bowel disorders or reaction to medicines.

Lead is used in a variety of consumer and manufacturing products, including ammunition, batteries, plastics, tank liners, pesticides and some metal alloys. The metal has been used since ancient times.

Following are the advantages of using CNG and LPG as fuels: (a) They are more efficient. (b) They can be easily transported; either in cylinders or through pipelines. (c) They are less polluting than other fossil fuels.

Plants need to excrete excess carbon dioxide and oxygen. Carbon dioxide is a waste product of aerobic respiration in plant cells. Oxygen is a waste product of photosynthesis.

Natural fibres such as wool and cotton are obtained from plants and animals are not synthetic fibres. Synthetic fibres are small units of chemicals joined together in the form of chain. The chain so formed is called a polymer. Polymer is a Greek work in which 'poly' means many and 'mer' means units. Thus, polymer means 'made of many units joined together'.

Bakelite is a poor conductor of heat and electricity. So it is used for making electric switches.

Cell wall outside the cell membrane gives shape and rigidity and also protects against variations in temperature or wind speed.

Noble metals are the metals that have the least tendency to react and have the property to maintain their lustre for long time. Gold is one of the noble metals.

Lead is used as a protective screen in X-rays.

The main purpose of yeast is to serve as a catalyst in the process of fermentation, which is essential in the making of bread and cakes. Alcohol is the metabolic product of yeast in wine and beer making. Specifically, it is produced by yeast during fermentation.

Plastics which can be deformed and bend easily are known as thermoplastics. PVC is an example of it as it can easily deform or bend.

Switch off the flame of the burner. Put a lid on the frying pan to cut off contact between fuel and oxygen and the flame will go off.

The temperature at which the vapour pressure of a liquid becomes equal to atmospheric pressure is called boiling point. At this temperature, the liquid starts boiling. Example: Boiling temperature of water is 100 degree Celcius.

The rise of water in the dropper is due to atmospheric pressure. When all the air escapes from the nozzle, the atmospheric pressure, which is acting on the water, forces the water to fill the nozzle of the dropper.

Nitrogen is flushed in chips packets to prevent rancidity.

Sodium metal is kept in kerosene.

Diamond is the hardest naturally occurring substance found on the Earth.

Polyester is a synthetic fibre. Fabric made from this fibre does not get wrinkled easily. It remains crisp and is easy to wash. So, it is quite suitable for making dress material.

Sowing is the process of addition of seeds into the soil. Seeds are sown in the field by two methods namely, broadcasting and transplanting.
Transplanting is developing young plants on a nursery bed and then transferring seedlings on to a field with proper spacing. It is done mainly in case of paddy crop.

Ursa Major is also referred to as the Big Dipper, the Great Bear or the Saptarishi (in India). It consists of seven prominent stars that are placed in the form of a dipper or in the shape of a bear.
Cassiopeia is another constellation, which can be located in the northern sky. It is visible during winter in the early part of the night. It looks like a distorted letter 'M' or 'W'. It has a clusters of stars.

To check the nature of the gas, first she has to dissolve the gas in water. Then, she has to test this gaseous solution with litmus paper. If red litmus turns blue, it is basic in nature. If blue litmus turns red, it is acidic in nature.

(a) Carbon dioxide + Water → Carbonic acid
(b) Sulphur dioxide + Water → Sulphurous acid