Flame test is not given by ...
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NEET Practice Questions (MCQs) with Answers & Solutions
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The alkaline earth metals forming ionic oxides are ...
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The basic character of the oxides $ MgO, SrO, K_2O, NiO and Cs_2O $ increases in the order :
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Explanation
Alkali metal oxides are most basic followed by alkaline earth metal oxides while transition metal oxides are least basic. Amongst alkali and alkaline earth metal oxides, basicity increases down the group. Thus, $ Cs_2O is more basic than K_2O and SrO is more basic than MgO. Therefore, the overall order is : NiO \lt MgO \lt SrO \lt K_2O \lt Cs_2O $
Which of the following are arranged in increasing order of solubilities ?
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Explanation
The solubility of bicarbonates of alkali metals increases down the group but alkaline earth metal carbonates are insoluble in $ H_2O $ .
The compound insoluble in acetic acid is ...
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Explanation
$ CaO, CaCO_3 and Ca(OH)_2 are all bases and hence must dissolve in acetic acid to form calcium acetate only calcium oxalate does not dissolve in CH_3COOH.$
The highest lattice energy corresponds to ...
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How many of the following s -block elements do not give characteristic colours in the flame test ? Li , Be, Ca, Ba, Sr, Mg, Na, K, Ba
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Explanation
2(Be, Mg)
How many of the following sulphates of metals dissolve in the water ? $ SrSO_4, K_2SO_4, BeSO_4, Li_2SO_4, MgSO_4, BaSO_4, Na_2SO_4, CaSO_4, Rb_2SO_4 $
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Explanation
$ 6 [K_2SO_4, BeSO_4, Li_2SO_4, MgSO_4, Na_2SO_4, Rb_2SO_4] $
How many of the following hydroxides is/are amphoteric in character ? $ CsOH, LiOH, Ca(OH)_2, Be(OH)_2, Mg(OH)_2, Sr(OH)_2, Ba(OH)_2, KOH, NaOH. $
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Explanation
$ 1 [Be(OH)_2] $
Out of Li, Na, K, Rb and Cs how many of them directly form superoxides on heating with oxygen ?
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Explanation
3[K, Rb, Cs]
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