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lol Q 7 not 17!
W and Y make an ionic bond not a covalent bond
D -bcz silver chloride is insoluble & sodium nitrate is soluble ,so can be separated by the given technique
Look..
Thank you !Look..
4 : Lets start according to student 1 He says that both should be unreactive
Now, Atom X has 8 more elctrons than Atom Y ( proton no. = elctrons)
so lets take X as Neon ,It has 10 electron so 10 + 8=18
In the periodic table look for the element with proton no. 18 i.e Argon
As student 2 said both of them are unreactive , Argon & Neon are unreactive
Then as student 1 said are both of them in the same group? Yes!
so it's A
23 : Copper is below hydrgen in the reactivity series so it cannot replace it
So using copper(metal) Copper Chloride cannot be prepared
But using base (Copper hydroxide) or carbonate (Copper carbonate) it can be made
So 2 and 3 only Ans is C
U got it right? welcumThank you !
Amphoteric oxides are the ones which react with both acid and alkali, eg : Al2O3.
Yes i did !!U got it right? welcum
It's written "the reaction is heated...". Hence, if the forward reaction is endothermic, the backward onw must be exothermic. Water is just another reactant in the backward reaction and doesn't affect the temperature.
Is it like exothermic reaction always have a temperature rise and endothermic reaction always cause a decrease in temperature
nope hydration is exothermic
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