Question 1 1.2 / -0
In a certain language, KEYBOARD is coded as MGADRCTF. What would be the code for YACHT in the same language?
Solution
If we look at the code for KEYBOARD, every letter is incremented by 2 letters, so K + 2
M,
E + 2
G and so on.
Coding YACHT in the same way, we get (ACEJV).
Y + 2
A
A + 2
C
C + 2
E
H + 2
J
T + 2
V
Question 2 1.2 / -0
How many triangles are there in this picture?
Solution
The triangles are given below:
Question 3 1.2 / -0
A man walks 5 km towards south and then turns to the right. After walking 3 km, he turns to the left and walks 5 km. In which direction is he now with respect to the starting point?
Solution
Hence, D is in the southwest with respect to the starting point A.
Question 4 1.2 / -0
Arrange the words given below in a meaningful sequence.
Solution
The correct order is 1, 3, 2, 4, 5.
Question 5 1.2 / -0
Look at figures (i) and (ii).
Which of the following is/are true?
Solution
As 6 is constant at the top, we can see that 1 and 5 are adjacent to 4. So, we conclude that 1 and 5 are opposite to each other. It is clearly visible that 4 and 5 are on adjacent faces, and 1, 4 and 5 are adjacent to 6.
Question 6 1.2 / -0
Which of the following Venn diagrams best illustrates the relationship between the four elements given below?
Espresso, Sugar, Milk, Coffee beans
Solution
An Espresso coffee is made up of the other three ingredients i.e., coffee beans, milk and sugar. So, the diagram (ii) best illustrates the relationship between the given elements.
Question 7 1.2 / -0
How many squares are there in the following figure?
Solution
ACHF, CDJH, ABKE, EKGF, BCLK, KLHG, NMOL
Question 8 1.2 / -0
A dice has been marked with crosses starting from 1 to 6. It is rolled. If the top face has 4 crosses, then how many crosses will there be on the bottom face?
Solution
As shown in the picture, the face having 4 crosses is opposite to the face having 2 crosses. Therefore, when 4-cross-face is at the top, then the 2-cross-face will be at the bottom.
Question 9 1.2 / -0
How would the given image P appear if it were folded?
Solution
The original image is P and when P is folded from the left side to the right side, the figure obtained is the same as shown in Figure a.
Question 10 1.2 / -0
Directions: On the basis of the given figure, answer the question given below.
Which letter represents the set of persons who play all the three games?
Solution
It is clear from the diagram that letter 'c' represents the set of persons who play all the three games.
Question 11 1.2 / -0
What is the primary constituent in the mixture of natural gas?
Solution
Methane is a chemical compound with the chemical formula CH4 (one atom of carbon and four atoms of hydrogen). It is a Group 14 hydride and the simplest alkane, and is the main constituent of natural gas. The relative abundance of methane on Earth makes it an attractive fuel, though capturing and storing it poses challenges due to its gaseous state under normal conditions of temperature and pressure.
Question 12 1.2 / -0
Which of the following is responsible for Malaria disease?
Solution
Malarial disease is caused by Plasmodium parasite.
Question 13 1.2 / -0
Which of the following is an advantage of being a multicellular organism?
Solution
There are advantages to being multicellular rather than unicellular. These include allowing the organism to be larger, and cell differentiation (having different types of cells with different functions). Cellular differentiation is the process by which a less specialised cell becomes a more specialised cell type. Differentiation occurs many times during the development of a multicellular organism as the organism changes from a single zygote to a complex system of tissues and cell types.
Question 14 1.2 / -0
Which of the following is a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen?
Solution
Biogas typically refers to a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste.
Question 15 1.2 / -0
Which of the following cannot be used to form petroleum?
Solution
Petroleum (also known as crude oil) is a fossil fuel that was formed from the remains of ancient marine organisms. Petroleum cannot be formed from the living plants.
Question 16 1.2 / -0
Which disease is caused by H1N1 virus in humans?
Solution
H1N1 causes swine flu in humans.
Question 17 1.2 / -0
Potassium reacts with oxygen to form
Solution
Metals react with oxygen to form oxides which are basic in nature.
Potassium oxide (K
2 O) is an ionic compound of potassium and oxygen and is a basic oxide. It reacts with water to form Potassium hydroxide, which is an alkali.
Question 18 1.2 / -0
In which of the following options is fermentation by bacteria possible?
Solution
Fermentation by bacteria helps in curing and flavouring of tea and tobacco, treatment of hide to fine leather, and retting of flax to obtain fibre.
Question 19 1.2 / -0
Which of the following is not the use of graphite?
Solution
Powdered graphite is used for making dry lubricant. Graphite is also used for making the core of pencils i.e., pencil leads, and for making graphite rods in dry cells.
Question 20 1.2 / -0
Which part of the flame is the hottest?
Solution
Outer zone or the blue part is the hottest in a flame.
It is also called non-luminous zone or zone of complete combustion.
Question 21 1.2 / -0
Which of the following materials is used in making raincoats, shoe soles and water pipes?
Solution
Polyvinyl chloride is used in making raincoats, shoe soles and water pipes.
Question 22 1.2 / -0
Which of the following function(s) in the sorting and delivery of internalised material from the cell surface and the transport of materials from the Golgi to the lysosome or vacuole?
Solution
Endosomes are a heterogeneous collection of organelles that function in the sorting and delivery of internalised material from the cell surface and the transport of materials from the Golgi to the lysosome or vacuole.
Question 23 1.2 / -0
Name the constellation that appears in the sky during winter time in the late evenings.
Solution
Orion is the constellation that appears in the sky during winter time in the late evenings.
Question 24 1.2 / -0
Identify the incorrect statement.
Solution
There are three types of muscles: Skeletal, Cardiac, and Smooth. Skeletal muscles (or striated) are voluntary muscles that control nearly every action a person intentionally performs. Skeletal muscles can be further divided into two types, slow twitch and fast twitch. Therefore, statement 3 is incorrect.
Question 25 1.2 / -0
Which of the following species have been categorised by the International Union for Conservation of Nature as likely to become endangered unless the circumstances threatening their survival and reproduction improve?
Solution
Vulnerable species are ones which have been categorised by the International Union for Conservation of Nature as likely to become endangered unless the circumstances threatening their survival and reproduction improve. Vulnerability is mainly caused by habitat loss or destruction.
Question 26 1.2 / -0
Which one of the following dot diagrams best describes the motion of a falling box from the time it is dropped to the time it hits the bottom of the pool? The arrows on the diagrams represent the points at which the box hits the water.
Solution
The box first accelerates with a negative (downward) acceleration until it hits the water. Upon hitting the water, the box experiences a balance of forces (50 N downwards due to gravity and 50 N upwards due to the water). Thus, the box will finish its motion moving with a constant velocity. Diagram A depicts both the initial downward acceleration and the final constant velocity.
Question 27 1.2 / -0
Which force is used to separate solid pollutant particles from smoke emitted by factories?
Solution
Electrostatic force is used to separate solid pollutant particles from smoke emitted by factories.
Question 28 1.2 / -0
Bauxite is an ore of which metal?
Solution
Bauxite is an ore of aluminium.
Question 29 1.2 / -0
A place where animals are protected in their natural habitat is called a
Solution
A place where animals are protected in their natural habitat is called a sanctuary.
Question 30 1.2 / -0
What type of force is exerted by a charged body?
Solution
Force exerted by a charged body is electrostatic force.
Question 31 1.2 / -0
What is the process of loosening the edible part of cereal grain (or other crop) from the scaly, inedible chaff that surrounds it called?
Solution
Threshing is the process of loosening the edible part of cereal grain (or other crop) from the scaly, inedible chaff that surrounds it.
Question 32 1.2 / -0
Which of the following are a significant source of Protein?
Solution
Legumes are a significant source of protein, dietary fibre, carbohydrates and dietary minerals; for example, a 100 gram serving of cooked chickpeas contains 18% of the Daily Value (DV) for protein.
Question 33 1.2 / -0
The process of depositing a layer of any desired metal on another material by means of electricity is known as
Solution
The process of depositing a layer of any desired metal on another material by means of electricity is known as electroplating.
Question 34 1.2 / -0
Which one of the below options is a good conductor of electricity?
Solution
Lemon juice is good conductor of electricity. Lemon is basically a citrus fruit, which contains an appreciable quantity of citric acid. Thus, lemon juice is a good conductor of electricity due to the presence of H+ ions. Plastic, rubber and wood are bad conductors of electricity.
Question 35 1.2 / -0
A batsman hits a cricket ball which then rolls on the level ground. After covering a short distance, the ball comes to rest. The ball stops due to
Solution
A batsman hits a cricket ball which then rolls on the level ground. After covering a short distance, the ball comes to rest. The ball stops due to frictional force.
Question 36 1.2 / -0
What is the sound with frequency between 20 Hz and 20,000 Hz called?
Solution
Sounds with frequencies between 20 Hz and 20,000 Hz are called audible sounds.
Question 37 1.2 / -0
Which of the following materials is only obtained from animals?
Solution
Wool is obtained from sheep.
Question 38 1.2 / -0
Which of the following statements is correct?
Solution
Frequency of a sound determines the shrillness or pitch of the sound. Shrillness or pitch increases with increase in frequency of the sound. Sound with greater frequency is shriller and has higher pitch. Sound with lower frequency is less shrill and of lower pitch.
Question 39 1.2 / -0
Name a device which is used to detect, measure and find the nature of a charge.
Solution
An electroscope is a device for detecting, measuring and finding the nature of a charge. An electroscope consists of a large jar. A metal rod is fitted into the mouth of the jar with the help of the cork. At the end of the metal rod, a pair of thin leaves of gold or aluminium is suspended.
Question 40 1.2 / -0
Which of the following is one thing that never affects a tsunami?
Solution
One thing that doesn't affect tsunamis is the weather because they are powered by energy from ocean-floor shifting. The waves aren't significantly impacted by the surrounding weather conditions.
Question 41 1.2 / -0
What is the speed of light in vacuum?
Solution
The speed of light in vacuum is defined to be exactly 299,792,458 m/s (approx. 186,282 miles per second). The fixed value of the speed of light in SI units results from the fact that the metre is now defined in terms of the speed of light.
Question 42 1.2 / -0
In which planet of our solar system have plate tectonics been observed?
Solution
Earth's liquid hydrosphere is unique among the terrestrial planets, and it is the only planet where plate tectonics have been observed.
Question 43 1.2 / -0
Which among the following types of star is a collection of gas that has collapsed down from a giant molecular cloud?
Solution
A protostar is a collection of gas that has collapsed down from a giant molecular cloud. The protostar phase of stellar evolution lasts about 100,000 years. Over time, gravity and pressure increase, forcing the protostar to collapse down.
Question 44 1.2 / -0
Which gas(es) is/are released by a thermal nuclear plant?
Solution
The flue gas from combustion of the fossil fuels is discharged to the air. This gas contains carbon dioxide and water vapour, as well as other substances such as nitrogen oxides (NOx ), sulphur oxides (SOx ), mercury, traces of other metals, and for coal-fired plants, fly ash.
Question 45 1.2 / -0
Which of the following is not an example of point source water pollution?
Solution
Nutrient run-off in stormwater is not an example of point source water pollution. It is an example of nonpoint sources (NPS) as it refers to diffuse contamination that does not originate from a single discrete source. NPS pollution is often the cumulative effect of small amounts of contaminants gathered from a large area.
Question 46 1.2 / -0
Which of the following statements are true?
Solution
1. The sulphurous acid turns blue litmus paper red. This statement is true.
Question 47 1.2 / -0
Which of the following pictures come under the category of bacteria?
Solution
Pictures A and B come under the category of bacteria.
Question 48 1.2 / -0
Name the missing parts of the animal cell given below in the figure.
Question 49 1.2 / -0
Which of the following options represents Cassiopeia?
Question 50 1.2 / -0
Match the items in column A with their functions in column B.
A B (1) Carbonisation (w) It is a mixture of about 200 substances. (2) Coal Tar (x) The slow process of conversion of dead vegetation into coal. (3) Bitumen (y) Thing used in the manufacture of steel and in the extraction of many metals. (4) Coke (z) Substance used in making paints and road surfacing
Solution
Carbonisation - As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonisation. Since it was formed from the remains of vegetation, coal is also called a fossil fuel.Coal Tar - It is a black, thick liquid with unpleasant smell. It is a mixture of about 200 substances. Products obtained from coal tar are used as starting materials for manufacturing various substances used in everyday life and in industry, like synthetic dyes, drugs, explosives, perfumes, plastics, paints, photographic materials, roofing materials, etc. Interestingly, naphthalene balls, used to repel moths and other insects, are also obtained from coal tar.Bitumen - It is the substance used in making paints and road surfacing.Coke - It is a tough, porous and black substance. It is almost pure form of carbon. Coke is used in the manufacture of steel and in the extraction of many metals.
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