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Kirti Bookstore sold books worth Rs2,85,891 in the first week of June and books worth Rs4,00,768 in the second week of the month. How much was the sale for the two weeks together? In which week was the sale greater and by how much?

Given that The value of books sold in the first week = Rs. 2, 85,891 The value of books sold... View Article

Take three test-tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO₂ ?

Test tube A will have the highest concentration of CO2 because the snail will take in oxygen and gives out... View Article

Which of the following is incorrect about a heterogeneous mixture? a. Constituents of heterogeneous mixtures are uniformly mixed. b. It is composed of multiple seperate parts c. It is composed of a chemcial solution d. All of the above

Constituents of heterogeneous mixtures are uniformly mixed.

Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure potential difference across the 12ohm resistor. What would be the readings in the ammeter and the voltmeter?

An ammeter should be connected in the circuit in series with the resistors. To measure the potential difference across the... View Article

Which among the following is true as per Newton’s third law: i) Action and reaction forces are always equal and opposite ii) An object tends to move in a straight line until and unless an external force is applied iii) None of the above

Action and reaction forces are always equal and opposite.

Which of the following is NOT true for solid crystals? a.Definite and characteristic heat of fusion b.Isotropic nature c.A regular periodically repeated pattern of arrangement of constituent particles in the entire crystal d.A true solid

b.Isotropic nature

Which of the following is not a characteristic of alveoli?a) They shuttle air to and from the lungs b) They maintain the shape and surface tension of the air sac c)They are arranged in clusters d)They sit at the end of the respiratory tree

Alveoli have a large surface area.

A book exhibition was held for four days in a school. The number of tickets sold at the counter on the first, second, third and final day was respectively 1094, 1812, 2050 and 2751. Find the total number of tickets sold on all the four days.

Given We are given that Number of tickets sold on the first day = 1,094 Number of tickets sold on... View Article

Which of the following is a feature of primitive subsistence farming? i) More labour requirement in the field ii) Crop rotation is practiced in few areas iii) Low land productivity iv) There is a permanent dwelling spot occupied by the community

Low land productivity

Choose the option which is not a property of metal: i) Metal is a good conductor of heat. ii) Except for mercury all the other metals are in liquid state. iii) Metals form cations in aqueous solution. iv) The oxides of metals are basic in nature.

ii) Except for mercury all the other metals are in liquid state. This is the correct option because mercury exist... View Article

An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed, so that a sharp focused image can be obtained? Find the size and the nature of the image.

Given that u = – 27 cm f = – 18 cm h0 = 7.0 cm Find out We need... View Article

Draw any line segment, say . Take any point C lying in between A and B. Measure the lengths of AB, BC and AC. Is AB = AC +CB? [Note: If A, B, C are any three points on a line, such that AC + CB = AB, then we can be sure that C lies between A andB.]

Since given that point C lie in between A and B. Hence, all points are lying on the same line... View Article

A person needs a lens of power -5.5 dioptre for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting (i) distant vision, and (ii) near vision?

The power P of a lens of focal length f is given by the relation P= 1/f (i) Power of... View Article

Which of the following characteristics is associated with gaseous state? a. Fixed Shape, Incompressible, Packed Closely b. Incompressible,Fixed Shape and Size c.definite shape, compresible and fixed volume d. no fixed shape and size, highly compressible

Gases do not have a fixed shape and size. They are highly compressible. Characteristics of gaseous state: Gases are fluid... View Article

Which of the following is not the characterstic of the image obtained from the plane mirror: i) The size of the image is bigger than the object ii) The final image obtained is erect iii) The image has a lateral inversion iv) The image obtained is virtual

The correct option is i) The size of the image is bigger than the object

Two objects, each of mass 1.5 kg, are moving in the same straight line but in opposite directions. The velocity of each object is 2.5 m/s before the collision during which they stick together. What will be the velocity of the combined object after collision?

Given that Mass of one of the objects,m1 = 1.5 kg Mass of the other object, m2 = 1.5 kg... View Article

Which is a correct rule of writing names in binomial nomenclature? i) The entire two part name must be written in Italics ii) The genus name is written in the second half of the name iii) The genus name should not be written in capital iv) All of the above

The correct option is i) The entire two part name must be written in Italics

In each of the following pairs of numbers, state which whole number is on the left of the other number on the number line. Also write them with the appropriate sign (greater than, less than) between them. (a) 530, 503 (b) 370,307 (c) 98765, 56789 (d) 9830415,10023001

(a) 530 > 503 So 503 appear on left side of 530 on a number line. (b) 370 > 307... View Article

Which one of the following is an example of decomposition reaction? a.AgCl †’ 2 Ag + Cl₂ b. CH₄ + 2O₂ → CO₂ +2 H₂O c. CaCO₃ + heat → CaO + CO₂ d. Fe + CuSO₄→ FeSO₄ + Cu

In decomposition reactions, a single reactant decomposes to form two or more products.2 AgCl †’ 2 Ag + Cl2

Which of the following is not a feature of the earthworm? i) Earthworms have a streamlined and segmented body. ii) For easy movement through the soil, earthworms release mucus. iii) They have open circulatory system iv) Earthworms are sensitive to vibrations and light.

The correct option is iii) They have open circulatory system

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