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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