Everyday Science MCQs

Page No. 91

Which of the following has the largest wavelength?


ainfrared light


bX- rays


cUltra-violet radiation


dVisible light


View Answer infrared light

Which of the following has the highest energy?


agamma rays


bX- rays


cUltra-violet radiation


dradio waves


View Answer gamma rays

All of the following are electromagnetic radiations except__________?


aRed light


bSound waves


cX-Rays


dPhoton


View Answer Sound waves

Second ionization energy:


ais always less than first ionization energy


bis always greater than first ionization energy


cis equal to first ionization energy


dmay be greater or less than the first ionization energy depending on the nature of the element



Nuclear radiation is emitted by those elements whose:


amolecules are stable


bmolecules are unstable


cnuclei are stable


dnuclei are unstable


View Answer nuclei are unstable

Color of the glow produced in the discharge tube:


adepends on the pressure in the discharge tube


bdepends on the metal used as cathode


cdepends on the gas used in the discharge tube


ddoes not depend on the nature of the gas used in the discharge tube



Covalent network crystals have_____________?


ahigher melting point then molecular crystals


blower melting point then molecular crystals


cdiscrete molecules linked by Van der waals forces


dHydrogen bonding



The increasing vapor pressure caused by heating a liquid is due to___________?


aincrease inter-molecular interactions


bincreasing potential energy of molecules


cincreasing kinetic energy of molecules


ddecreasing surface tension



Rate of evaporation of petrol is greater than that of water at room temperature because:


apetrol molecules do not have any hydrogen bond


bpetrol is an organic compound


cwater molecules have small size


dpetrol molecules have greater size



Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to____________?


ahydrogen bonding


birregular shape of the molecules


cirregular shape of the molecules and strong inter-molecular forces


dgreater molecular size



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