Question 1 1.2 / -0
Directions: Choose the correct word that can replace the question mark (?) to complete the relationship. Bike : Petrol :: Air conditioner : ?
Solution
A bike runs on petrol. Similarly, an air conditioner runs on electricity.
Question 2 1.2 / -0
If LINGER is coded as !@#$%& and ANGER is coded as *#$%&, then how will you code GINGER?
Solution
The code of different letters is given below as: L -- ! I -- @ N --- # G --- $ E --- % R ----- & Similarly, we can find out the code for GINGER. GINGER = $@#$%&
Question 3 1.2 / -0
If Krisha works 2400 minutes per week, find the total time (in hours) she will work in 4 weeks.
Solution
In one week, she works 2400 minutes.
In 4 weeks, time taken by her = 2400 x 4 = 9600 minutes
To find the answer in hours, we will divide 9600 by 60, (1 hour = 60 minutes).
= 160 hours
Question 4 1.2 / -0
A man walks 6 km toward south and then turns to the right. After walking 3 km he turns to the left and walks 5 km. Now in which direction is he from the starting place?
Solution
Hence required direction is South-West.
Question 5 1.2 / -0
If a mirror is placed on the line AB, which of the option figure shows the correct image of the given question figure?
Solution
If a mirror is places on the line AB then the following of the answer figures is the right image of the given figure.
Question 6 1.2 / -0
Choose the term that will come in place of the question mark (?) in the given relationship. ABC : CDE : : MNO : ?
Solution
Every next letter for the corresponding term is obtained after getting two jumps in the original term. A + 2 = C B + 2 = D C + 2 = E Similarly, M + 2 = O N + 2 = P O + 2 = Q
Question 7 1.2 / -0
Silk Worm is to Silk as Sheep is to _____.
Solution
Silk is obtained from silk worm; similarly, wool is obtained from sheep.
Question 8 1.2 / -0
A is the father of B and C is the mother of D. M is the paternal uncle of D. If B and D are siblings, then how is M related to A?
Solution
B and D are siblings, so A and C are husband and wife. M is the paternal uncle of D and hence, the brother of D's father, who is A.
Question 9 1.2 / -0
Five boys are sitting in a restaurant bench. Mohan is to the left of John and to the right of Inder. Jack is to the right of John. Raman is between John and Jack. Who is sitting second to the right of Mohan?
Solution
Inder, Mohan, John, Raman, Jack From the given arrangement, Raman is sitting second to the right of Mohan.
Question 10 1.2 / -0
Rearrange the following letters to make a single word and then choose the category to which it belongs: Y L A T I
Solution
After rearranging the given letters, we get Y L A T I = I T A L Y; which is a country.
Question 11 1.2 / -0
Miscible liquids are those which mix well and form a homogenous mixture. Which of the following statements regarding miscible liquids are correct? I. They mix well in all proportions. II. They form a monolayer of the liquid. III. The separation method for miscible liquids is based on the difference in their densities. IV. The separation method for miscible liquids involves both heating and cooling of the components.
Solution
Those liquids which mix together in all proportions and form a single layer are called miscible liquids. A mixture of miscible liquids is separated by the process of simple distillation or fractional distillation which involves vapourisation (by heating) and condensation (by cooling). The process of distillation is based on the difference in the boiling points of the components and not on the difference in the densities. Hence, only statement III is incorrect.
Question 12 1.2 / -0
Which of the following statements is incorrect regarding the motion of a pendulum?
Solution
The motion of pendulum is not rotatory as it does not complete a full circle.
Question 13 1.2 / -0
The supersonic is one whose speed is more than
Solution
Super sonic is the object whose speed is more than the speed of sound.
Question 14 1.2 / -0
Which of the following is not a conductor?
Solution
Glass is not a conductor, while copper wire, sea water, and graphite are conductors of electricity.
Question 15 1.2 / -0
Heating and dropping a magnet may
Solution
Heating and dropping a magnet may demagnetise the magnet to lose its magnetic property.
Question 16 1.2 / -0
Observe the method of separation applied to a mixture of 'P' and 'Q' and select the option that identifies the components correctly.
Solution
The process being demonstrated is filtration. The mixture of P and Q forms a suspension. Sand being insoluble in water forms a suspension. Hence, P is water and Q is sand.
Question 17 1.2 / -0
Directions: Read the statements given below and choose the correct option accordingly.Assertion (A): In desert plants, leaves are modified into spines.Reason (R): Modification of leaves into spines helps to prevent water loss, through transpiration.
Solution
In desert plants, the leaves are modified into spines. This modification helps in reducing the loss of water through the leaves (in the form of transpiration). Hence, the reason is the correct explanation of the assertion.
Question 18 1.2 / -0
Mustard oil can be separated from water by
Solution
Mustard oil and water are immiscible liquids and the components of the mixture will form separate layers when the mixture is allowed to settle. They can be separated by the process of decantation and the process can be made more effective by using a separating funnel.
Question 19 1.2 / -0
When a body covers equal distance in equal interval of time, the motion of the body is called
Solution
When a body covers equal distance in equal interval of time, the motion of a body is called uniform motion.
Question 20 1.2 / -0
The instrument used to see above the water surface from submarine is
Solution
The instrument used to see above the water surface from submarine is called periscope.
Question 21 1.2 / -0
When an electrician repairs electric line, he wears rubber gloves as
Solution
When an electrician repairs electric line, he wears rubber gloves as rubber is a bad conductor of electric current and prevents him from electric shock.
Question 22 1.2 / -0
North pole of a magnet can be identified by
Solution
North pole of a magnet can be identified by another magnet having marked north and south poles by attracting or repelling it.
Question 23 1.2 / -0
Consider the two processes mentioned below:Process A: Anaerobic bacteria digest animal waste and produce biogas. Process B: The biogas is then burnt as fuel. The following statements pertain to changes in these processes. Choose the correct one.
Solution
Both the processes are chemical changes as new substances are formed as products in both the reactions. Both these changes are irreversible.
Question 24 1.2 / -0
The process of separating the cotton fibers from the seeds is called _____________.
Solution
The process of separating out seeds from the cotton fibre is called ginning. The device used for the purpose is called a gin.
Question 25 1.2 / -0
200 g of uncooked rice was mixed with 200 g of common salt. Which of the following is the best method for separating the two components?
Solution
Since there is a difference in the size of the rice grains and the salt crystals, sieving is the best and the most convenient method to separate them. Hence, option (2) is correct.
Question 26 1.2 / -0
Two activities were demonstrated for the students of class VI.
Activity I: An iron rod was heated till red hot.
Activity II: An iron blade was added to the blue solution of copper sulphate which turned Green. A reddish brown deposit was also formed on the blade.
Four students arrived at different conclusions from the observations.
Solution
Heating of the rod is a physical change as no new substance is formed in the process.
A chemical change occurs when the iron nail is added to the solution of copper sulphate.
Iron + Copper sulphate
Copper + Ferrous sulphate
Hence, Aryan's observation is correct.
Question 27 1.2 / -0
According to the principle of rectilinear propagation of light,
Solution
Light travels in straight lines. It cannot bend. This phenomenon is known as rectilinear propagation of light.
Question 28 1.2 / -0
Observe the Venn diagram classifying the objects/materials on the basis of transmission of light through them.
Select the option that correctly illustrates P, Q and R.
Solution
Glass is a transparent material. Butter paper is translucent. Brick is opaque. Therefore, option (3) is correct.
Question 29 1.2 / -0
A freely suspended magnet always aligns in
Solution
A freely suspended magnet always aligns in N-S direction having North Pole towards north and South Pole towards south because the earth act as big magnet having its magnetic north in south pole and and magnetic south in north direction direction.
Question 30 1.2 / -0
Which of the following condition(s) is/are essential for rusting to occur? (a) Heat (b) Moisture (c) Carbon dioxide (d) Oxygen
Solution
Presence of both moisture and oxygen is required for rusting of iron. Rusting will not occur in the absence of any one or both of these conditions.
Question 31 1.2 / -0
'X' is a plant fibre and is obtained from the fruit of the plant. The fibre is thick, brow, strong and has high abrasion resistance. Select the X among the given options.
Solution
Coir is a natural fiber of the coconut husk. It is a thick and coarse but durable fiber.
Question 32 1.2 / -0
Which of the following mixtures can be separated using the following apparatus?
Solution
A separating funnel is a device used to separate two or more liquids which are immiscible and form separate layers when the mixture is left undisturbed. The denser component of the mixture forms the lower layer.
Water and petrol are immiscible liquids and can be separated using a separating funnel.
Question 33 1.2 / -0
The motion of which of the following objects is known as periodic motion?
Solution
The motion of a simple pendulum is known as periodic motion, motion repeated in equal intervals of time.
Question 34 1.2 / -0
Which of the following statements regarding light is incorrect?
Solution
Light does not consist of electrons. Light is composed of photons.
Question 35 1.2 / -0
Inside the torch, two or more cells are placed with the following arrangement:
Solution
Inside the torch, two or more cells are placed with positive – negative – positive – negative terminals to power the torch, else with any other arrangement, it won't work.
Question 36 1.2 / -0
When a bar magnet is cut into two pieces, then
Solution
When a bar magnet is cut into two pieces, then each piece will have its own poles.
Question 37 1.2 / -0
Observe the following table classifying W, X, Y and Z as physical and reversible changes.
Which of the following options regarding W, X, Y and Z is incorrect?
Solution
All the listed processes are physical changes. Cutting of paper is a physical change which is irreversible. Although there is no change in the properties of the substance, the pieces cannot be put together to get the original paper. Hence, the example for W in option (1) is incorrect.
Question 38 1.2 / -0
We use woollen clothes in winter as wool is
Solution
We use woollen clothes in winter as woollen fibres trap a lot of air which is a poor conductor of heat and prevents the body heat from escaping.
Question 39 1.2 / -0
In an activity to study the factors affecting the rate of evaporation, a student took 100 mL of water in four containers of different shapes and labelled them A, B, C and D. He kept them at the same place in the sun and measured the volume of water remaining in the containers after 3 hours.The following data was collected:
A B C D Initial volume of water 100 mL 100 mL 100 mL 100 mL Volume of water after 3 hours 80 mL 95 mL 90 mL 85 mL
The containers in the increasing order of the surface area of water exposed are:
Solution
Rate of evaporation increases with increase in the area of water exposed to the surface. Since the rate of evaporation is maximum in container A and minimum in container B, the surface area of the water exposed is maximum in A and minimum in B. Hence, option (4) is correct.
Question 40 1.2 / -0
From a burning candle, light travels as rays which are
Solution
From a burning candle , the light rays starts from a point and travel in various directions,so the light rays are divergent.
Question 41 1.2 / -0
Which of the following options is FALSE?
Solution
A weathercock shows the direction in which the air is moving at that place.
Question 42 1.2 / -0
Study the given venn diagram and select the correct option.
Solution
Option (3) is correct because flax is a bast fibre obtained from the stem of the plant. All other options are incorrect. Cotton is obtained from the seed. Jute and ramie fibres are obtained from the plant stem.
Question 43 1.2 / -0
Which of the following is a non-magnetic substance?
Solution
Substances which are not attracted by a magnet are called non-magnetic substances. Iron, cobalt and nickel are all magnetic substances and are attracted by a magnet.
Question 44 1.2 / -0
Consider the following list of substances: a. Sand b. Mud c. Coconut oil d. Copper sulphate e. Wheat flour Copper sulphate is the odd one in the list because
Solution
The most basic property which makes copper sulphate unique in this list is that it is soluble in water, whereas all the other substances are insoluble in water.
Question 45 1.2 / -0
During night, Moon appears shining although it is not a luminous body because of
Solution
During night, Moon appears shining although it is not a luminous body because it reflects the sunlight.
Question 46 1.2 / -0
Match the following:
Solution
Xerophytes grow in deserts or very dry places where there is scarcity of water. Cactus is an example of xerophytes. Hydrophytes grow in watery places which remain very wet throughout the year. Hydrilla is an example of hydrophytes. Mesophytes are the plants which we see around us. They grow in moderate conditions of temperature, light, water and oxygen. Neem is an example of mesophytes.
Question 47 1.2 / -0
Eric was learning about shadows and light, and was trying to make a project on that topic. The following is the image he has made while working on his project.
What does arrow depict in the image?
Solution
Umbra and Penumbra are two types of shadows.
Umbra is formed where no light reaches and it is dark, black shadow.
Penumbra is formed where some light reaches and it is grey in colour.
So, the arrow is point at the part where some light reaches and it is grey in colour. i.e. Penumbra.
Question 48 1.2 / -0
Specific properties of three vitamins X, Y and Z are given below: X: Synthesised in the body by the action of sunlight Y: Required for good vision Z: Required for blood clotting Choose the incorrect statement from the options given below.
Solution
The correct identification of X, Y and Z is: Vitamin D, Vitamin A and Vitamin K, respectively. Option 1 is incorrect regarding Vitamin K. Vitamin K is a fat-soluble vitamin which can be stored in the fatty tissue of the body.
Question 49 1.2 / -0
Study the classification chart given below showing two types of skeletal joints (P and Q).
Which of the following statements is correct regarding these?
Solution
Shoulder and hip joints represent the ball and socket joint. In the ball and socket joint, one end of the bone fits into the hollow part of another bone. Elbow and knee joints represent a hinge joint which shows restricted movement. Hinge joint is not present between the vertebrae. Fixed joint is found in the vertebrae. Hinge joints are present between the bones of fingers.
Question 50 1.2 / -0
Analyse the following statements and select the option which shows the group of correct statements. (i) Black soil is good for cotton. (ii) Cotton, jute, flax, hemp, coir and ramie are plant fibres. (iii) Fabric is made from yarn by weaving or knitting. (iv) Alluvial soil is bad for cotton. (v) The spinning of fibres decreases the strength of the yarn.
Solution
Cotton grows best in black deep soil. Cotton, jute, flax, hemp, coir and ramie are all fibres which are gained from plants. Fabric is made from yarn by either weaving or knitting. Hence, the statements (i),(ii) and (iii) are correct Alluvial soil is good for cotton as well. The spinning of fibres increases the strength of the yarn. Hence, the statements (iv) and (v) are incorrect