The correct statements among the following ar | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) $BeH_2$ and $MgH_2$ are electron-deficient compounds and exist as polymeric structures in the solid state. This statement is correct.$(B)$ $LiH$ i

Vedclass · Accepted Answer

$A, B, C$ only

Vedclass · Answer

(D) $BeH_2$ and $MgH_2$ are electron-deficient compounds and exist as polymeric structures in the solid state. This statement is correct.$(B)$ $LiH$ is unreactive to oxygen at moderate temperatures, whereas it reacts at higher temperatures. This statement is correct.$(C)$ Due to the small size and high polarizing power of $Be^{2+}$ and $Mg^{2+}$ ions, $BeH_2$ and $MgH_2$ possess significant covalent character. This statement is correct.$(D)$ The stability of alkali metal hydrides decreases as the size of the alkali metal cation increases down the group. Therefore, the correct order is $LiH > NaH > KH > RbH > CsH$. This statement is incorrect.Thus, the correct statements are $(A)$, $(B)$, and $(C)$.

Column-$I$	Column-$II$
$I. Ca(OH)_2$	$A$. Casts of statues
$II. NaCl$	$B$. White wash
$III. CaSO_4 \cdot \frac{1}{2}H_2O$	$C$. Antacid
$IV. CaCO_3$	$D$. Washing soda preparation

List-$I$	List-$II$
$A$. Alkali metals	$I$. $ns^2 np^6$
$B$. Alkaline earth metals	$II$. $ns^1$
$C$. Halogens	$III$. $ns^2 np^5$
$D$. Noble gases	$IV$. $ns^2$

Similar Questions

$Al_4C_3$ is an ionic carbide,named as

What is the nature of metal nitrates?

Match the following compounds (Column-$I$) with their uses (Column-$II$):

Column-$I$ Column-$II$

$I. Ca(OH)_2$ $A$. Casts of statues

$II. NaCl$ $B$. White wash

$III. CaSO_4 \cdot \frac{1}{2}H_2O$ $C$. Antacid

$IV. CaCO_3$ $D$. Washing soda preparation

Copper becomes green when exposed to moist air for a long period. This is due to

Match the following:
List-$I$ List-$II$
$A$. Alkali metals $I$. $ns^2 np^6$
$B$. Alkaline earth metals $II$. $ns^1$
$C$. Halogens $III$. $ns^2 np^5$
$D$. Noble gases $IV$. $ns^2$

Vedclass Test Series

Exam Paper Generator

Online Exam Module