NSO - Mock Test - 1

After interchanging × and ÷,
We get
6 + (9 - 3) × (8 + 1) ÷ (7 - 4) = 6 + 6 x 9 ÷ 3 = 24

In a leap year, there are 29 days in February. So, if he has one exam after 5 days, which are 27^th, 28^th, 29^th, 1^st and 2^nd, so he will have his next exam on 3^rd of March.

This is an alternating subtraction series in which 2 is subtracted twice, then 3 is subtracted once, then 2 is subtracted twice, and so on.

If Wednesday is on 10^th, then Sunday is on 14^th. So, it means that the anniversary is on 14^th.

Grandfather's son means either son or uncle.
Mother of uncle or son is grandmother.

Each time, we are multiplying by 2 and then adding 2.

43 x 2 = 86 + 2 = 88

88 x 2 = 176 = 176 + 2 = 178 (actual)

178 x 2 = 356 + 2 = 358

So, 179 is the odd one out..

The atoms of carbon can be bonded together in different ways, termed 'allotropes of carbon'. The best known are graphite, diamond, and amorphous carbon. The physical properties of carbon vary widely with the allotropic form.

If a magnet is left to itself over a long period of time, it gets demagnetised, i.e. it loses its magnetic property.

The laws of reflection are valid for every kind of surface.

Glass sheet is a transparent object, not an opaque object.
An opaque object is an object through which light cannot pass. The light is either reflected, scattered, or absorbed.

When a beam of light strikes an unpolished wooden surface, there will be a diffused reflection as an unpolished wooden surface is irregular, and not smooth.

Deficiency of proteins in the diet for a long time results in swelling of the face, swollen neck, undergrowth of the body, etc. This is because proteins are the building blocks of the body and should be taken in sufficient amounts.

Earthworms can breathe inside the soil. They come outside only when water takes the place of air in the soil.

Air is also an important part of soil. Within the soil, pockets of air are trapped. The organisms living in the soil use oxygen from the air trapped in the pockets of the soil.

The handle of a screw-driver is made of rubber or plastic, as rubber and plastic are bad conductors of electricity.

Magnesium hydroxide reduces stomach acid and increases water in the intestines which may induce defecation. Magnesium hydroxide is used as a laxative to relieve occasional constipation (irregularity) and as an antacid to relieve indigestion, sour stomach, and heartburn.

Light is a form of energy produced by a luminous object. An object is considered luminous if it emits its own light.

Kwashiorkor is a severe form of malnutrition, caused by a deficiency in dietary protein. Symptoms of Kwashiorkor are: Dark and scaly skin, anaemia, and mental retardation.

An aqueous solution turns blue litmus solution red, it means the given solution is acidic in nature. Since sodium hydroxide is basic in nature, the excess addition of sodium hydroxide would change the nature of the solution to basic. Therefore, the basic solution turns red litmus solution to blue again.

Potatoes, garlic and ginger are underground stems modified to store food.

Sodium chloride (NaCl) is the classic case of ionic bonding. The sodium chloride molecule is formed by the ionisation of sodium and chlorine atoms, and the attraction of the resulting ions.

In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.

Carbon dioxide passed into limewater gives a milky solution. This is due to the insoluble suspension of calcium carbonate formed. Ca(OH)₂(aq) + CO₂(g) → CaCO₃(s) + H₂O(l)

Stomata take carbon dioxide from atmosphere and are responsible for the process of photosynthesis.

Citric acid is responsible for the sour taste of orange juice.

Crystallisation is the process by which we can obtain pure solids of copper sulphate.

In olden days, shadows caused by objects placed in the sun were used to measure time. Such a device is called a sundial or Samrat Yantra.

Amoebae use their pseudopods to ingest food by a method called phagocytosis. The streaming of protoplasm inside the pseudopods moves the amoeba forward. When the organism contacts a food particle, the pseudopods surround the particle.

Curdling of milk is an irreversible change because the product so obtained cannot be changed into its original form. Curd cannot become milk again.

Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion.

Threshing is the process of removing the grain of wheat or barley from the stalk and husk. It is done in different ways, depending on how much grain there is. Essential to threshing is a threshing floor, a flat area of hard rock, on which freshly harvested wheat could be piled.

The food chain follows the order as given below:

Producer -> Primary consumer -> Secondary consumer -> Tertiary consumer

Hence, Grass -> Grasshopper -> Frog -> Snake

Frog = Secondary consumer

Vitamin K is required for clotting of blood.

Earthworm has bristles on the underside of the body to support movement. The bristles are connected with muscles. The bristles help to get a good grip on the ground.

Vitamin C is essential for healing bleeding gums and wounds. Citrus fruits like oranges, grapes, lemons, tomatoes should be eaten in this situation.

The combination of cartilages and bones forms the skeleton of the body.

Winnowing: The process of separation of lighter particles from heavier particles with the help of wind is called winnowing.
Filtration: This method is used for separating fine insoluble solid particles from the liquid.
Condensation: The process of conversation of water vapour into its liquid vapour called condensation.
Saturated Solution: When a solution of a liquid and solid has enough of the solid and it cannot take any more solid, the solution is called saturated solution.

Winnowing: The process of separation of lighter particles from heavier particles with the help of wind is called winnowing.
Filtration: This method is used for separating fine insoluble solid particles from the liquid.
Condensation: The process of conversation of water vapour into its liquid vapour called condensation.
Saturated Solution: When a solution of a liquid and solid has enough of the solid and it cannot take any more solid, the solution is called saturated solution.