Multiple choice question

4 lksfM;e /kkrq esa ped dk dkj.k gS&
(a) vafre d{k esa bySDVªkuksa dk nksyu (b) lksfM;e vk;uksa dk folj.k
(c) eqDr bySDVªkuksa dk mRrstu (d) buesa ls dksbZ ugha
Shining of Na Metal is due to–
(a) Vibrations in outer most orbitals electrons (b) Diffusion of Na +
(c) Activation of free electrons (d) None of these
5 fdl lYQsV dh foys;rk U;wure gksxh
Which sulphate has least solubility–
(a) MgSO 4 (b) BaSO 4 (c) SrSO 4 (d) CaSO 4
7 {kkjh; e`nk /kkrqvksa ds lYQsVksa dh ?kqyu'khyrk lewg esa uhps tkus ij ?kVus dk
dkj.k gS&
(a) fØLVy tkyd ÅtkZ esa o`f) gksuk (b) leUo; la[;k esa o`f) dk gksuk
(c) xyukadksa esa o`f) dk gksuk (d) mijksDr lHkh dk gksuk
The decrease in solubility of the sulphates of alkaline earth metals on going
downwards in the group–
(a) Increase in crystal lattice energy (b) Increase in coordination number
(c) Increase in their melting point (d) All of these
8 lksfM;e dk nzo veksfu;k¡ esa foy;u&
(a) uhyk jax nsrk gS (b) lksfM;e vekbM cukrk gS
(c) H xSl nsrk gS 2 (d) buesa ls dksbZ ugha
In liquid ammonia Na metal gives
(a) Blue colour (b) Soda Amide
(c) H 2 Gas released (d) None of these
9 Na SO ty esa foys; gS fdUrq BaSO vfoys; D;ksafd&
2 4 4
(a) Na SO dh tkyd ÅtkZ ty;kstu ÅtkZ ls de gS
2 4
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