MCQ
The number of lone pairs of electrons on the central $I$ atom in $I_{3}^{-}$ is $.......$


- ✓$3$
- B$0$
- C$1$
- D$2$

The number of lone pairs of electron on the central atom is $3 .$
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$N _{2} O _{4}( g ) \rightleftharpoons 2 NO _{2}( g ) ; \Delta H ^{0}=+58 kJ$
For each of the following cases $(a, b),$ the direction in which the equilibrium shifts is:
$(a)$ Temperature is decreased
$(b)$ Pressure is increased by adding $N _{2}$ at constant $T$
|
List$-I$ (Oxide) |
List$-II$ (Nature) |
| $(A)$ $Cl _{2} O _{7}$ | $(I)$ Amphoteric |
| $(B)$ $Na _{2} O$ | $(II)$ Basic |
| $(C)$ $Al _{2} O _{3}$ | $(III)$ Neutral |
| $(D)$ $N _{2} O$ | $(IV)$ Acidic |
Choose the correct answer from the options given below
$CaCO _{3( s )}+2 HCl _{( aq )} \rightarrow CaCl _{2( aq )}+ CO _{2( g )}+2 H _{2} O _{( l )}$
[Calculate upto second place of decimal point]
