Which of the following pair is/are correctly matched?
Which of the following pair is/are correctly matched? Spacecraft Purpose 1. Cassini-Huygens Orbiting the Venus and transmitting data to the Earth 2. Messenger Mapping and investigating the Mercury 3. Voyager 1 and 2 Exploring the outer […]
During a thunderstorm, the thunder in the skies is produced by the
During a thunderstorm, the thunder in the skies is produced by the 1. meeting of cumulonimbus clouds in the sky 2. lightning that separates the nimbus clouds 3. violent upward movement of air and water particles Select the correct answer using the codes given below.(2013) a) 1 only b) 2 and 3 c) 1 and […]
Fruits stored in a cold chamber exhibit longer storage life because
Fruits stored in a cold chamber exhibit longer storage life because(2013) a) exposure to sunlight is prevented b) concentration dioxide in the is increased of carbon environment c) rate of respiration is decreased d) there is an increase in humidity Answer: C Fruits respire. They give out ethylene which helps in ripening. When fruits are […]
Ball Bearings Are Used in bicycles, cars, etc., Because
Ball bearings are used in bicycles, cars, etc., because(2013) a) the actual between the is increased area of contact wheel and axle b) the effective between the is increased area of contact wheel and axle c) the effective between the is reduced area of contact wheel and axle d) None of the above statements is […]
Which of the above are optical illusions?
Consider the following phenomena: 1. Size of the sun at dusk 2. Colour of the sun at dawn 3. Moon being visible at dawn 4. Twinkle of stars in the sky 5. Polestar being visible in the sky Which of the above are optical illusions?(2013) a) 1, 2 and 3 b) 3, 4 and 5 […]
Which of the following physical phenomena are responsible for this?
Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this? 1. Dispersion 2. Refraction 3. Internal reflection Select the correct answer using the codes given below.(2013) a) 1 and 2 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and […]
Many Transplanted Seedlings do not grow because
Many transplanted seedlings do not grow because(2013) a) the new soil does not contain favourable minerals b) most of the root hairs grip the new soil too hard c) most of the root hairs are lost during transplantation d) leaves get damaged during transplantation Answer: C Many transplanted seedlings do not grow because most of […]
Select the correct answer using the codes given below
Which of the following statements is / are correct? 1. Viruses lack enzymes necessary for the generation of energy. 2. Viruses can be cultured in any synthetic medium. 3. Viruses are transmitted from one organism to another by biological vectors only. Select the correct answer using the codes given below.(2013) a) 1 only b) 2 […]
The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force
The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?(2013) a) Gravity is the strongest of the four b) Electromagnetism act only on particles with an electric charge c) Weak nuclear […]
With Reference To Stem Cells frequently in the news, which of the following statements is/are correct?
With reference to ‘stem cells’, frequently in the news, which of the following statements is/are correct? 1. Stem cells can be derived from mammals only. 2. Stem cells can be used for screening new drugs. 3. Stem cells can be used for medical therapies. Select the correct answer using the codes given below (2012) a) […]