Chemistry MCQs

Page No. 114

Which of the following theories is superior to others__________________?


aVSEPR


bVBT


cMOT


dnone of the above


View Answer MOT

The balanced chemical equation for the reaction which occurs when Be is added to water is____________?


aBe+2H2O?Be (OH)2+H2


bBe+H2O?Be (OH)2+H2


cBe+H2O?[Be (OH)4]+2+H2


dno reaction


View Answer no reaction

The hardest of the following solids is__________________?


asodium


bdiamond


cgraphite


dmagnesium


View Answer diamond

Which of the following is mineral fiber ?


aTeflon


basbestos


csaran


dacrylic


View Answer asbestos

Which statement is consistent with Hunds rule ?


aElectrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin.


bThe electrons in the same atom cannot have the same four quantum numbers


cThere is maximum of two electrons is an orbital.


dNone



When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained ?


a1


b2


c3


d4


View Answer 3

When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________?


a0.33 nm


b0.34 nm


c0.35 nm


d0.36 nm


View Answer 0.33 nm

Which of the following properties prove that cathode rays are material in nature_________________?


athey cast shadow


bthey possess momentum


cthey are negatively charged


dall of the above


View Answer they possess momentum

Paramagnetic behaviour of substance is measured by a balance called___________________?


aAnalytical balance


bGuoys balance


cElectrical balance


dSingle beam balance


View Answer Guoys balance

Metallic crystals are soluble in________________?


aPolar solvent


bNon polar solvent


cFused metal


dNone


View Answer Fused metal

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