[{"id":156751,"question":"The pressure exerted on the walls on the vessel by gas molecules is defined as:","choices":[{"text":"Force per unit volume","value":"A"},{"text":"Energy per unit area","value":"B"},{"text":"mass per unit volume","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":156749,"question":"Change in momentum per second is:","choices":[{"text":"Product force and time","value":"A"},{"text":"Product of pressure and area","value":"B"},{"text":"Ratio of pressure and area","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156742,"question":"In case of diffraction grating, unit of grating element is:","choices":[{"text":"Centimeter","value":"A"},{"text":"Kilometer","value":"B"},{"text":"As that of g","value":"C"},{"text":"as that of angle","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156741,"question":"Phenomenon of interference and diffraction support the:","choices":[{"text":"Quantum nature of light","value":"A"},{"text":"Tranverse nature of light","value":"B"},{"text":"Wave nature of light","value":"C"},{"text":"Complex nature of light","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":156733,"question":"The phenomenon of blending of around edges of an obstacle is called:","choices":[{"text":"Interfarance","value":"A"},{"text":"Defraction","value":"B"},{"text":"Polorisation","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156729,"question":"To find wavelength of light by his experiment. Newton utilized:","choices":[{"text":"Principle of phase change","value":"A"},{"text":"Snell's Law","value":"B"},{"text":"Bragg's law","value":"C"},{"text":"Both (A) and (C)","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156724,"question":"In Michelson's interferometer , the plates are placed in front of incident ray at an angle of:","choices":[{"text":"45<sup>o</sup>","value":"A"},{"text":"60<sup>o</sup>","value":"B"},{"text":"90<sup>o</sup>","value":"C"},{"text":"120<sup>o</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156717,"question":"In Micheal sons interfrometes apparatus the numbers of mirrors and glas plates are used respectively ara","choices":[{"text":"2,2","value":"A"},{"text":"2,3","value":"B"},{"text":"3,2","value":"C"},{"text":"3,3","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156709,"question":"To wavelength of light by his experiment , Newton utilized:","choices":[{"text":"Wavelength of light","value":"A"},{"text":"Intensity of light","value":"B"},{"text":"amplitude wave","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156707,"question":"In newton's rings see through the reflected light, centeral spo is:","choices":[{"text":"Bright","value":"A"},{"text":"Dark","value":"B"},{"text":"Either of the Two","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156703,"question":"Newton's rings are:","choices":[{"text":"Rectangular","value":"A"},{"text":"Spherical","value":"B"},{"text":"Concentric circles","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":156696,"question":"In newton's rings apparatus, we also use:","choices":[{"text":"Spectroscope","value":"A"},{"text":"Telescope","value":"B"},{"text":"Microscope","value":"C"},{"text":"Any of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":156693,"question":"Newton's rings are:","choices":[{"text":"Concetric circles","value":"A"},{"text":"spherical","value":"B"},{"text":"None of these","value":"C"},{"text":"Rectangular","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156690,"question":"The central ring is bright in case of newton's ring produced by:","choices":[{"text":"Reflected light","value":"A"},{"text":"Transmitted light","value":"B"},{"text":"Wedged film","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156684,"question":"Newton's rings are formed due to:","choices":[{"text":"Manetisation","value":"A"},{"text":"Diffractin","value":"B"},{"text":"Interference","value":"C"},{"text":"Polarization","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":156682,"question":"A _____ lens is used in the apparatus to get newton's ring:","choices":[{"text":"Plano-concave","value":"A"},{"text":"Plano-convex","value":"B"},{"text":"Convexo concave","value":"C"},{"text":"Double covex","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156676,"question":"In case of interference fringes:","choices":[{"text":"Energy is destroyed at dark","value":"A"},{"text":"Energy is created at bright fringes","value":"B"},{"text":"Energy is transferred from dark to bright ringes","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":156673,"question":"The distance between different interference fringes are:","choices":[{"text":"Variable","value":"A"},{"text":"Same","value":"B"},{"text":"Different","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156670,"question":"Conditions for interference are that the two sources should be coherent and:","choices":[{"text":"At the far off distance","value":"A"},{"text":"Close together","value":"B"},{"text":"Coinciding","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156666,"question":"The blending of light when it passes from one medium to another is known as:","choices":[{"text":"Refraction","value":"A"},{"text":"Interfarance","value":"B"},{"text":"Polarization","value":"C"},{"text":"Both (B) and (C)","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156665,"question":"YDS experiment can be used to determine:","choices":[{"text":"Grating element","value":"A"},{"text":"Fringe spacing","value":"B"},{"text":"Wave length of monochromatic light","value":"C"},{"text":"Frequency of wave light","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":156663,"question":"In YDS experiment, data given is<span style=\"font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt;\">λ=500 nm, d=1 mm, L=100cm,</span>∆y come out to be:","choices":[{"text":"0.5 cm","value":"A"},{"text":"0.5 mm","value":"B"},{"text":"0.5 nm","value":"C"},{"text":"0.5 m","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":156659,"question":"Fringe spacing in YDS experiment will be maximum if we use:","choices":[{"text":"Red light","value":"A"},{"text":"Green light","value":"B"},{"text":"Violet light","value":"C"},{"text":"Blue light","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156657,"question":"If the slits in YDS experiment are made closer, fringe spacing will:","choices":[{"text":"Increase","value":"A"},{"text":"Decrease","value":"B"},{"text":"Remain same","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":156653,"question":"In YDS experiment, if the distance between the slits and also the distance between slits and screen is doubled, the fringe width:","choices":[{"text":"Becomes doubled","value":"A"},{"text":"Becomes 4 times","value":"B"},{"text":"Is halved","value":"C"},{"text":"Remains the same","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":156649,"question":"Experimental demonstration of wave nature of light was given in 1801 by:","choices":[{"text":"Newton","value":"A"},{"text":"Maxwell","value":"B"},{"text":"Thomas young","value":"C"},{"text":"Compton","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154255,"question":"Polymers are the physical combinations of carbon with:","choices":[{"text":"Oxygen only","value":"A"},{"text":"Hydrogen","value":"B"},{"text":"Nitrogen","value":"C"},{"text":"All of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":5},{"id":154254,"question":"Examples of crystalline solids are:","choices":[{"text":"Copper","value":"A"},{"text":"Zirconia","value":"B"},{"text":"NaCI","value":"C"},{"text":"All of these","value":"D"},{"text":"Both A and B","value":"E"}],"correctAnswer":4},{"id":154253,"question":"Examples of polymeric substances are:","choices":[{"text":"Plastic","value":"A"},{"text":"Synthetic rubbers","value":"B"},{"text":"Zirconia","value":"C"},{"text":"All of these","value":"D"},{"text":"Both A and B","value":"E"}],"correctAnswer":4},{"id":154252,"question":"The structure of the polymeric solid is:<br>","choices":[{"text":"An ordered structure","value":"A"},{"text":"A disordered structure","value":"B"},{"text":"Intermediate between order or disorder","value":"C"},{"text":"Any of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":154251,"question":"When relatively simple molecules are chemically combined into massive molecules, the reaction is called:","choices":[{"text":"Fission reaction","value":"A"},{"text":"Fusion reaction","value":"B"},{"text":"Polymerization reaction","value":"C"},{"text":"Any of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":154249,"question":"Each atom in a metal crystal:","choices":[{"text":"Remains fixed","value":"A"},{"text":"Vibrates about a fixed point","value":"B"},{"text":"Moves randomly","value":"C"},{"text":"Rotates about the centre of the crystal","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":154247,"question":"In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:","choices":[{"text":"Adhesive forces","value":"A"},{"text":"Nuclear forces","value":"B"},{"text":"Inter atomic cohesive force","value":"C"},{"text":"Electromagnetic force","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":154246,"question":"The pattern of NaCI particles have a shape which is:","choices":[{"text":"Cubic","value":"A"},{"text":"Body centred cubic","value":"B"},{"text":"Simple cubic","value":"C"},{"text":"Face centred","value":"D"},{"text":"Both A and C","value":"E"}],"correctAnswer":5},{"id":154244,"question":"The whole structure obtained by the repetition of unit cells is called:","choices":[{"text":"Crystal lattice","value":"A"},{"text":"Amorphous solid","value":"B"},{"text":"Polymeric solid","value":"C"},{"text":"Polystrene","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":1},{"id":154243,"question":"The temperature at which the vibrations become so great that structure of the crystal breaks up, is called:","choices":[{"text":"Critical temperature","value":"A"},{"text":"Temperature of vaporization","value":"B"},{"text":"Melting point","value":"C"},{"text":"Both A and C","value":"D"},{"text":"Both A and B","value":"E"}],"correctAnswer":3},{"id":154242,"question":"Tick the one which is not a crystalline solid:","choices":[{"text":"Zirconia","value":"A"},{"text":"Glass","value":"B"},{"text":"Copper","value":"C"},{"text":"Ceramic solid","value":"D"},{"text":"An ionic compound","value":"E"}],"correctAnswer":2},{"id":154241,"question":"A unit set is the smallest basic structure which is:","choices":[{"text":"One dimensional","value":"A"},{"text":"Two dimensional","value":"B"},{"text":"Three dimensional","value":"C"},{"text":"Four dimensional","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":154240,"question":"The arrangement or molecules or atoms in a crystalline solid can be studied by using:","choices":[{"text":"Chemical methods","value":"A"},{"text":"Neutrons","value":"B"},{"text":"X-ray techniques","value":"C"},{"text":"Copper atoms","value":"D"},{"text":"Both A and B","value":"E"}],"correctAnswer":3},{"id":154239,"question":"In a cubic crystal, all the sides meet at:","choices":[{"text":"60<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"A"},{"text":"90<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"B"},{"text":"109<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"C"},{"text":"30<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"D"},{"text":"10<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"E"}],"correctAnswer":2}]