NSO - Mock Test - 2

Each time the gap between the numbers is decreasing by 3.

99 – 102 = -3
93 – 99 = -6
84 – 93 = -9
72 – 84 = -12

To find the next term in the series, we need to do:
72 – 15 = 57

According to the question,

S -> 09
C -> 11
R -> 17
I -> 23
B -> 06
B -> 06
L -> 18
E -> 24

If we re-arrange SCRIBBLE, LIBBERS will be formed.

L -> 18
I -> 23
B -> 06
B -> 06
E -> 24
R -> 17
S -> 09

So, LIBBERS is coded 18-23-06-06-24-17-09.

Grandfather's wife -> Meera's grandmother

Son of grandmother -> Meera's father

Daughter of Meera's father -> Meera's sister

The only difference between an AC generator and a DC generator is that a split-ring commutator is used in DC generator, whereas two slip rings are used in AC generator.

We know, potential difference, V = W/Q

Here, potential difference, V = 128 – 118 = 10 volts

Work done, W = ?

Charge on the He²⁺ ion = 2 × 1.6 × 10^-19 = 3.2 × 10^-19 C

Hence, work done, W = VQ = 10 × 3.2 × 10^-19 = 32 × 10^-19 J

C, N and O are elements of the second period.
The atomic radius decreases across the period because the effective nuclear charge increases across the period.
Hence, the correct order of the atomic radii is:
C > N > O

Organic acids are carboxylic acids, having an carboxyl group –COOH.
Lactic acid is an example of an organic acid.

On moving from left to right across the periods of the periodic table, the atomic radius decreases and hence the ionisation energy increases.
Therefore, the tendency to lose the valence electrons, i.e. the electropositive character decreases.

Hazardous waste is waste that poses a substantial and potential threat to public health or the environment. In the United States, the treatment, storage, and disposal of hazardous waste are regulated under the Resource Conservation and Recovery Act (RCRA). The most common examples of hazardous waste found within the homes include paints, batteries, solvents, cleaning agents and pesticides.
Among the listed substance, chlorine bleach is a chemical which is hazardrous, if not disposed properly.

Apical meristem is present on root apex, stem apex, leaf buds and flower buds. They are responsible for growth in length, i.e. primary growth.

Synapse is the junction between two neurons. In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron.

Centromere is the region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division. During prophase, the spindle also begins to form as the two pairs of centrioles move to opposite poles and microtubules begin to polymerise from the duplicated centrosome.

The salivary glands in mammals are exocrine glands, glands with ducts, that produce saliva. The 3 types of salivary glands are parotid, submandibular and sublingual glands.

The process in which the absorbed food is taken in by the body cells and used for energy, growth and repair is called assimilation.

In this process, an organism divides into two equal parts, which on separation live independently. During this process, the nucleus of the parent cell divides mitotically into two equal parts; which is followed by the division of the cytoplasm resulting in the formation of the two identical cells referred to as daughter cells.

Tracheoles are the thin tubes attached to the trachea within the body of an insect and permit gaseous exchange.

Reproduction by fragmentation is seen in filamentous algae, e.g. spirogyra. The filament of spirogyra divides into many pieces and each piece develops into a new individual.

A flower that contains both the male and the female reproductive structure (stamen and pistil) is called a bisexual flower. Unisexual flowers are those flowers which have either the stamen or the pistil. Examples of plants that bear unisexual flowers are corn, papaya, cucumber, etc.

Leydig cells, also known as interstitial cells of Leydig, are found adjacent to the seminiferous tubules in the testicle. They produce testosterone in the presence of luteinizing hormone (LH).

The microscopic aquatic plants freely floating on the surface of water are called phytoplankton. Phytoplankton have chlorophyll to capture sunlight, and they use photosynthesis to turn it into chemical energy. They consume carbon dioxide, and release oxygen.

Naphthaleneacetic acid (NAA) is a synthetic plant hormone in the auxin family and is an ingredient in many commercial plant rooting horticultural products. It is a rooting agent.

The primary function of meiosis is the reduction of the ploidy (number of chromosomes) of the gametes from diploid (2n, or two sets of 23 chromosomes) to haploid (1n or one set of 23 chromosomes). This ensures that on fertilisation, the diploid number is retained in the offspring.

Vibrio cholerae is the causative agent responsible for cholera. The bacteria are transmitted between humans through the faecal-oral route; a bite of contaminated food or a sip of contaminated water can cause infection.

When bitten by a malaria-infected mosquito, the parasites that cause malaria are released into our blood and infect our liver cells. The parasite reproduces in the liver cells, which then burst open. This allows thousands of new parasites to enter the bloodstream and infect red blood cells.

Binary fission of Leishmania happens in a longitudinal plane due to the presence of flagella at one end of the cell.

Insect-pollinated flowers are large and have bright-coloured petals to attract insects. Also, they are sweet scented and contain large amount of nectar. All these factors help to attract insects.

Chiropterophily is pollination of plants by bats. Bat pollination is most common in tropical and desert areas that have many night-blooming plants.

Mineral deposition in bones and teeth is due to vitamin D. Vitamin D refers to a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate. Vitamin D helps in absorption of minerals present in milk and other food items.

Ca(OH)₂(I) + CO₂(g) → CaCO₃(s) + H₂O(I)
Oxides of non metals are acidic; hence this is a neutralisation reaction between a base and an acidic oxide to give salt and water.