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CBSE

Subject

Chemistry
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NEET Chemistry : The s-Block Elements

Multiple Choice Questions

51.

Among the following components of cement which is present in highest amount?

  • Ca2SiO4

  • Ca3SiO5

  • Al2O3

  • Ca3Al2O6



52.

Metals are good conductor of electricity because they contain :

  • a network structure

  • ionic bonds

  • very few valence electrons

  • free electrons



53.

The pair whose both species are used in antiacid medicinal preparation is

  • NaHCO3 and Mg(OH)2

  • Na2CO3 and Ca(HCO3)2

  • Ca(HCO3)2 and Mg(OH)2

  • Ca(OH)and NaHCO3.



54.

Radioactive metal is :

  • Li

  • Ce

  • Na

  • Ra



55.

Which of the following is a use of alum ?

  • Making explosives

  • Bleaching clothes

  • Water softening

  • All of the above



56.

Which of the following has the highest tendency to give the reaction,

M+(g) mediumaqueous M+(aq.) ?

  • Na

  • Li

  • K

  • Rb



57.

Which of the following fluorides has the lowest melting point?

  • BaF2

  • SrF2

  • CaF2

  • BeF2



58.

The compound which does not exist as hydrate form

  • ferrous sulphate

  • copper sulphate

  • magnesium sulphate

  • sodium chloride



59.

Which of the following is a false statement ?

  • Fluorine is more electronegative than chlorine

  • Nitrogen has greater IE1 than oxygen

  • Lithium is amphoteric

  • Chlorine is an oxidising agent



60.

Which of the following acids will not evolve H2 gas on reaction with alkali metals?

  • Hydrazoic acid

  • Perxenic acid

  • Boric acid

  • None of these



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