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You Are On Question Answer Bank SET 2331

116551. The change of a solid into vapor directly is called?

Answer: Sublimation

116552. How can boiling point of a liquid be reduced?

Answer: By decreasing the pressure on the liquid

116553. The speed of light with the rise in the temperature of the medium?

Answer: Remains unaltered

116554. Tides in the sea are caused by:?

Answer: Combined effect of moon and sun

116555. Tidal range denotes the?

Answer: Difference between high and low tide

116556. Radiolarian oozes occur in the depths of?

Answer: 2000 to 5000 fathoms

116557. Fiord originate as a result of?

Answer: Glacial erosion

116558. Which is the largest gulf in the world?

Answer: The Gulf of Mexico

116559. The canal joining Baltic Sea to the North Sea is?

Answer: Kiel Canal

116560. Coral reefs are formed by?

Answer: Tiny colonial marine animals which construct limestone skeleton material

116561. The Great Barrier Reef is?

Answer: Conglomeration of corals in Australian waters

116562. An oxe-bow lake is a?

Answer: Lake formed due to cut off meander

116563. Phenol is also called??

Answer: Carbolic acid

116564. Aspirin is??

Answer: Antipyretic

116565. Salicylic acid is used??

Answer: Methyl salicylate

116566. What is the bond between two amino acids in a protein called??

Answer: Ester bond

116567. What does protein deficiency in the children usually between the age of 1 to 3 years cause??

Answer: Kwashiorkor

116568. Deficiency of which vitamin results in inflammation of skin and eczema along with diarrhea??

Answer: Nicotinic acid

116569. The lowest layer of earth’s atmoshphere is??

Answer: Troposphere

116570. A main in a train moving at a constant velocity drops a ball on the platform. The path of the ball as seen by an observer standing on the platform is?

Answer: A parabola

116571. Lightyear is a measurement of?

Answer: Stellar distances

116572. Gas thermometers are more sensitive than the liquid thermometers because the gases?

Answer: Have low specific heat

116573. When lake starts freezing the formation of the ice will start first at the?

Answer: Top

116574. Heat is associated with?

Answer: K.E of random motion of molecules

116575. The value of g on the earth’s surface changes due to?

Answer: Both rotation and shape of the earth

116576. The gas thermometers are more sensitive than the liquid thermometers because of gases?

Answer: Expand more than liquids

116577. The process of emission of electrons from metal by UV rays is?

Answer: Photoelectric emission

116578. The electrons are emitted in the photoelectric effect from a metal surface?

Answer: Only if the frequency of the incident radiation is above a certain threshold value

116579. The dual nature of light is exhibited by?

Answer: Diffraction and photoelectric effect

116580. Photocells are used for the?

Answer: B and Both

116581. Photoelectric effect can be explained by assuming that light?

Answer: Consists of quanta

116582. Which is the incorrect statement of the following?

Answer: Photon is a particle with zero momentum

116583. The velocity of photo electron emitted in photoelectric effect depends only on?

Answer: The wave length of incident light

116584. The wavelength of the matter waves is independent of?

Answer: Charge

116585. A photo sensitive material would emit electrons, if excited by photons beyond a threshold. To overcome the threshold, one would increase?

Answer: The frequency of light

116586. Potassium is extracted by the electrolysis of?

Answer: Fused KOH

116587. The active metals are extracted from their ores by the process of reduction with?

Answer: Electric current

116588. The purification of alumina is done by?

Answer: Baeyer’s process

116589. An important ore of Mg is?

Answer: Carnallite

116590. During the process of electrolytic refining of copper some metals present as impurity settle as anode mud these are?

Answer: Ag and Au

116591. In nuclear fission the percentage of mass converted into energy is about?

Answer: 0.10%

116592. In photoelectric effect the number of photoelectrons emitted is proportional to?

Answer: Intensity of incident beam

116593. In which mode of transmission, the heat waves travel along the straight line with the speed of light?

Answer: Lose energy

116594. Coefficient of linear expansion always …….. with the increase in temperature?

Answer: Remains

116595. A circular disc of copper has a symmetrical hole at its center. The disc is uniformly heated. The diameter of the hole will?

Answer: Increase

116596. The displacement-time graph of a particle acted upon by a constant force is?

Answer: A Straight line

116597. If a graph is plotted taking the temperature in Fahrenheit along the Y-axis and the corresponding temperature in Celsius along X- axis it will be the straight line?

Answer: Having a positive intercept on the Y-axis

116598. Photosynthesis is fasters in?

Answer: Red light

116599. In photosynthesis?

Answer: Light energy is converted into chemical energy

116600. When chlorophyll absorbs light it gets excited and emits?

Answer: Electrons
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