| 1 | Consider the following chemical equation : pAl + q H2O → r Al2 O3 + SH2 To balance this chemical equation, the values of 'p', 'a, "r' and 's' must be respectively : | (C) 2,3,1,3 |
| 2 | Which of the given option represents a family of salts? | (B) K2SO4 , NA2SO4 , CaSO4 |
| 3 | The most common method of extraction of metals from their oxide ores iS : | (A) Reduction with carbon |
| 4 | Given below are the structures of some hydrocarbons. Select the two structures which are related to each other from the given options | C (ii) and (iii) |
| 5 | Choose the incorrect statement about the common reaction used in hydrogenation of vegetable oils. | (D) It is an addition reaction which occurs in the presence of an acid catalyst. |
| 6 | Match Column 1 with Column2 | D |
| 7 | The part of the brain which maintains the posture and balance of the body is : | (C) Cerebellum |
| 8 | The plant hormone present in greater concentration in the areas of rapidly dividing cells is : | (B) Cytokinins |
| 9 | Select a pair of bisexual flowers from the following : | (B) Hibiscus and mustard |
| 10 | The gastric glands present in the wall of the stomach release : | (C) Mucus and Pepsin |
| 11 | 11: Absolute refractive index of water and glass is 4/3 and 3/2 respectively. If the speed of light in glass is 2 x 108 m/s, the speed of light in water is : | (A) 9/4 ms |
| 12 | When a beam of white light passes through a region of very fine dust particles, the colour of light that scatters the most in that region is : | (C) Blue |
| 13 | A wire of length 'l' is gradually stretched so that its length increases to 3l. If its original resistance is R, then its new resistance will be: | (C) 9R |
| 14 | Which one of the following statements is not true about a bar magnet ? | (D)The direction of magnetic field lines inside a bar magnet is from its north pole to its south pole. |
| 15 | The strength of magnetic field produced inside a long straight current carrying solenoid does not depend upon : | (B) Direction of current flowing through the solenoid |
| 16 | Other than the abiotic components, which of the given biotic components are not required to make an aquarium with small herbivorous fishes a self-sustaining system ? | D (ii) and (IV) |
| 17 | Assertion (A) : Hydrogen gas is not evolved when a metal reacts with nitric acid. Reason (R) : Nitric acid is a strong reducing agent and reduces the hydrogen produced in the reaction to water. | C |
| 18 | (A) : In our actions of writing or talking, our nervous system communicates with the muscles. Reason (R) : Cranial nerves and spinal nerves form the peripheral nervous system. | B |
| 19 | Assertion (A) : Magnetic field lines around a bar magnet never intersect each other. Reason (R) : Magnetic field produced by a bar magnet is a quantity that has both magnitude and direction. | B |
| 20 | Assertion (A) Use of jute bags for shopping reduces pollution Reason (R) : Jute is biodegradable and its bag may be reused as and when needed. | A |
POST YOUR COMMENT