2Mark the correct statement:aNa+ is smaller than Na atombNa+ is larger than Na atomcCl- is smaller than Cl atomdCl- (ion) and Cl (atom) are equal in sizeShow answer
3Mark the correct statement:aAll lanthanides are present in the same groupbAll halogens are present in the same periodcAll the alkali metals are present in the same groupdAll the Noble gases are present in the same periodShow answer
4Which statement is incorrect?aAll metals are good conductor of electricitybAll metals are good conductor of heatcAll the metals forms positive ionsdAll metals form acidic oxidesShow answer
5Which statement is incorrect?aHydrogen resembles in properties with IA, IVA, VIIA elements.bHydrogen resembles in properties with IIIA, IVA, VA elementscHydrogen resembles in properties with IIA, VIA, IVA elementsdHydrogen resembles in properties with IIA, VIIA, IIIA elementsShow answer
6Mark the correct statement:aThe ionization energy of calcium is lower than that of bariumbThe ionization energy of calcium is lower than that of magnesiumcThe ionization energy of calcium is higher than that of berylliumdThe ionization energy of calcium is lower than that of strontiumShow answer
7Mark the correct statement:aMetallic character increases down the groupbMetallic character increases from left to right along a periodcMetallic character remains the same from left to right along a perioddMetallic character remains the same down the groupShow answer
8Mark the correct statement:aElectron affinity is a measure of energy required to remove the electronbElectron affinity is a measure of energy released by adding an electroncElectron affinity is a measure of energy required to excite an electrondElectron affinity is a measure of energy released by removing an electronShow answer
9Mark the correct statement:aMelting points of halogens decrease down the groupbMelting points of halogens increase down the groupcMelting points of halogens remain the same throughout the groupdMelting points of halogens first increase than decrease down the groupShow answer
10Mark the correct statement statement:aCovalent character of metal halides increases from left to right in a periodbBoiling points of Group IVA hydrides decrease down the groupcIonic character of hydrides increase from left to right in a perioddThe basicity of group IIA oxides decreases on descending the groupShow answer
12The decrease in atomic sizes is not much prominent across rows containing elements of:as-blockbp-blockcd-blockdf-blockShow answer
18The base of modern periodic law is:aElectron affinitybAtomic masscIonization energydAtomic numberShow answer
20Smaller the size of an ion:aLesser is the degree of hydrationbLesser is the polarizing powercGreater is the electrondGreater is the degree of hydrationShow answer
