Which of the following statements is not corr | vedclass

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(C) $1$. Carbonates of alkaline earth metals $(MgCO_3, CaCO_3, SrCO_3, BaCO_3)$ are generally insoluble in water.$2$. $Beryllium$ halides (e.g.,$BeCl_

Vedclass · Accepted Answer

The superoxides of alkali metals are colourless.

Vedclass · Answer

(C) $1$. Carbonates of alkaline earth metals $(MgCO_3, CaCO_3, SrCO_3, BaCO_3)$ are generally insoluble in water.$2$. $Beryllium$ halides (e.g.,$BeCl_2$) are covalent due to the small size and high polarizing power of the $Be^{2+}$ ion.$3$. Alkali metal superoxides (e.g.,$KO_2, RbO_2, CsO_2$) are paramagnetic and coloured (usually yellow or orange) due to the presence of the unpaired electron in the $\pi^* 2p$ molecular orbital.$4$. Alkali metal halides have high negative enthalpies of formation due to high lattice energy.Therefore, the statement that superoxides of alkali metals are colourless is incorrect.

List-$I$	List-$II$
$A$. Slaked lime	$I$. $NaOH$
$B$. Dead burnt plaster	$II$. $Ca(OH)_2$
$C$. Caustic soda	$III$. $Na_2CO_3 \cdot 10H_2O$
$D$. Washing soda	$IV$. $CaSO_4$

List-$I$	List-$II$
$(a)$ $Li$	$(i)$ photoelectric cell
$(b)$ $Na$	$(ii)$ absorbent of $CO_{2}$
$(c)$ $K$	$(iii)$ coolant in fast breeder nuclear reactor
$(d)$ $Cs$	$(iv)$ treatment of cancer
	$(v)$ bearings for motor engines

Which of the following statements is not correct?

Similar Questions

Which of the following salts is known as washing soda?

Match List-$I$ with List-$II$:

List-$I$ List-$II$

$A$. Slaked lime $I$. $NaOH$

$B$. Dead burnt plaster $II$. $Ca(OH)_2$

$C$. Caustic soda $III$. $Na_2CO_3 \cdot 10H_2O$

$D$. Washing soda $IV$. $CaSO_4$

Choose the correct answer from the options given below:

Alkali metals possess metallic lustre when freshly cut because

Hydroxide of which alkali metal is used in the manufacture of soft soap?

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