NSO - Mock Test - 2

The pattern which follows in the given series is that the first digit is increased by 1 and the second digit is increased by 2, like 6 + 1 = 7 and 11 + 2 = 13. So, accordingly, the missing term is: (8, 15).

The pattern that follows in the series is as below:
36 – 3 = 33
33 + 4 = 37
37 – 3 = 34
34 + 4 = 38
38 – 3 = 35

Coding is as below:
V – 1 = U
O – 1 = N
L – 1 = K
T – 1 = S
A – 1 = Z
S – 1 = R
Similarly, TEACH in that code will be written as SDZBG.

There is only one 5 which is immediately preceded by a symbol and immediately followed by 8, i.e. "&58".

We know that '+' means '-' and '÷' means 'x', as per the question.
Accordingly, (32 + 24) ÷ 5 means (32 – 24) × 5.
Solving, we get
8 × 5 = 40

The left side of the :: shows that the second number is the cube of the first number.
Accordingly, 11³= 1331

Triatomic molecules are molecules composed of three atoms.
Carbon monoxide is diatomic: CO.
All the other options are triatomic.
Ozone: O₃
Carbon dioxide: CO₂
Nitrous oxide: N₂O

Canal rays are the positively charged radiation produced in the discharge tube that seem to emerge from the anode and move towards the cathode. When a perforated cathode is used, they produce scintillations behind the cathode. Goldstein called these positive rays Kanalstrahlen, "channel rays" or "canal rays", because they could be detected only when a perforated cathode was used.

Fractional crystallisation is the process of separating the components of a solution on the basis of their different solubilities in the same solvent.
On cooling a solution containing both the solutes, the less soluble component crystallises out first.

Centrifugation is the technique which is used to separate a mixture in which the components differ in their densities. e.g. curd from butter.
On agitating the mixture, curd being less dense will float on the top.

A mixture of camphor and salt can be separated by sublimation.
A mixture of iron and sand can be separated by magnetic separation.
Salt is separated from sea water by evaporation.

Sericulture was developed in China in late 1970s. Sericulture, or silk farming, is the cultivation of silkworms to produce silk.

The silkworm is the larva or caterpillar of the domestic silkmoth, Bombyx mori. It is an economically important insect, being a primary producer of silk.

Statement I is incorrect as a fuel can burn below the temperature of 25^oC, provided it is at a temperature equal to or higher than the ignition temperature.
Statement II is correct because when burnt in insufficient supply of air, partial combustion takes place and the flame produced is luminous and yellowish orange in colour.

Sodium bicarbonate (NaHCO₃) is baking soda.

Momentum is product of mass and velocity. The law of conservation of momentum explains "If the external force acting on a system of bodies is zero, then the momentum of system remains conserved."

If a object is moving in the circle, the direction of the velocity of the object at any point is always tangential to circle. Because of the inertia of direction, the stone will move along a straight line tangential to the circular path when the string is broken..

Apparent weight of the object in water = True weight of the object in air - upthrust

Upthrust = Weight of water displaced by the object

Hence, weight of water displaced = True weight - Apparent weight

Weight of water displaced = 10 - 8 = 2 N

Collenchyma cells have thin primary walls with some areas of secondary thickening. Collenchyma provides extra structural support, particularly in regions of new growth.
Sclerenchyma provides the main structural support to a plant.

Peptic ulcer is caused by the bacteria named Helicobacter and is mostly found in the upper gastrointestinal tract.

Heterocysts are specialised nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica.

Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide.

Scottish botanist Robert Brown (1773-1858) was responsible for discovering the nucleus of a cell.

H. Whittaker in 1959 classified organism into five kingdoms as Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae and Kingdom Animalia.

Plantae are multicellular eukaryotic organisms with cell wall made up of cellulose.

Plant tissues in which cells keep on dividing are called meristematic tissue.
Meristematic tissues are present in those parts of plants which keep on growing. A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place. Meristematic cells give rise to various organs of the plant and keep the plant growing.

The nucleolus is a round body located inside the nucleus of a eukaryotic cell. It is not surrounded by a membrane but sits in the nucleus. The nucleolus makes ribosomal subunits from proteins and ribosomal RNA, also known as rRNA.

Silviculture is the practice of controlling the establishment, growth and composition, health and quality of forest to meet the diverse needs and values of the people.

Pine, fir, spruce, cedar and cypress are the famous timber-yielding plants. All of these belong to gymnosperms.

Cholera is caused by bacterium Vibrio cholerae.

Pseudomonas play the role in denitrification, which is the conversion of nitrates into free nitrogen.

Ptyalin is an amylase present in saliva that catalyzes the hydrolysis of starch into maltose and dextrin.

Majority of induced mutations are recessive and therefore are not expressed in diploid cells (due to the presence of dominant allele). Haploids provide a convenient system for the induction of mutations and selection of mutants with desired traits.

Nymph is the name given to the young one of a cockroach.

Xylem is primarily instrumental for the conduction of water and solutes, and also for mechanical support.

Mariculture is a practice of culture of marine fish varieties in the open sea. In mariculture, satellites and echo sounders are used for locating fish. Then they are caught using many kinds of fishing nets from the fishing boats.

Mixed cropping – It simply means growing two or more crops simultaneously on the same piece of land, for e.g. growing a leguminous crop with a non-leguminous crop. Therefore, if the non-leguminous crop cannot take nitrogen from the soil, the other leguminous crop consumes it as it can take the nitrogen available in the soil.

The reaction I represents incomplete combustion as unburnt carbon is left behind.
The products of complete combustion of hydrocarbons are CO₂ and H₂O.
The production of CO or unburnt carbon indicates partial combustion.