In a pressure-kerosene stove, (i) We pump kerosene and convert it into vapours. (ii) The vapours are then ignited. Which of the following is true about the above statements? A(i) is a chemical change; (ii) is a physical change. B(i) is a physical change; (ii) is a chemical change. CBoth (i) and (ii) are physical changes. DBoth (i) and (ii) are chemical changes.
The freezing and boiling points of a substance 'P' are -220°C and -185°C respectively. At which of the following range of temperatures will 'P' exist as a liquid? ABetween -175°C and -210°C BBetween -190°C and -225°C CBetween -200°C and -160°C DBetween -195°C and -215°C
Arrange the following planets in increasing order of time required to complete one revolution around Sun. (i) Earth (ii) Uranus (iii) Mars (iv) Jupiter A(i), (ii), (iii), (iv) B(i), (iii), (iv), (ii) C(iv), (iii), (ii), (i) D(ii), (iii), (i), (iv)
Find the odd one out. A B C D
A constant current flows in a horizontal wire in the plane of the paper from west to east as shown in the given figure. The direction of magnetic field will be north to south, at a point __________. ADirectly above the wire BDirectly below the wire CLocated in the plane of the paper, on the north side of the wire DLocated in the plane of the paper, on the south side of the wire
Which of the following statements hold true regarding the given plants X and Y? 1. Plant X depends partly on animals for food but can also make its own food while plant Y cannot make its own food. 2. Plant X has chlorophyll while plant Y does not contain chlorophyll and is non-green. 3. In plant X, food is prepared by the green stem, whereas plant Y obtains its food from dead and decaying plants and animals. 4. Plant X and plant Y have patches of green colour. Only green part of their leaves performs photosynthesis. A1, 3 and 4 B2 and 3 C1 and 4 D3 and 4
A can jump two steps at a time. If it is at 5th step, where will it be after 2 jumps? A B C D
Water droplets that are too heavy to float make AFog BClouds CRain DSmoke
Multimedia is used for many purposes like _________. AEducation BAdvertising CPlaying games DAll of these
Choose the best reply. Arpita : Is your test result out? Kavita : __________. AWhat's outside? BNo, not yet. CWhat's the matter? DIt's not in.