Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?
- AChemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens
- BIn alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group
- CThe reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group
- DIn both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group
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Which one of the following is the most electropositive element?
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View SolutionThe element with $Z = 120$ (not yet discovered) will be a/an:
Identify the statements which are not correct?
$(i)$ $ZnO, PbO, Sb_2O_3$ are neutral oxides.
(ii) $CO$ and $NO$ are amphoteric oxides.
(iii) $CrO_3, Mn_2O_7, V_2O_5$ are basic oxides.
$(i)$ $ZnO, PbO, Sb_2O_3$ are neutral oxides.
(ii) $CO$ and $NO$ are amphoteric oxides.
(iii) $CrO_3, Mn_2O_7, V_2O_5$ are basic oxides.
Which of the following is the most electropositive element?
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View SolutionThe electronic configuration of three elements $A, B$ and $C$ are given below. The molecular formula of the compound formed from $B$ and $C$ will be
$A : 1s^2, 2s^2, 2p^6$
$B : 1s^2, 2s^2, 2p^6, 3s^2, 3p^3$
$C : 1s^2, 2s^2, 2p^6, 3s^2, 3p^5$
$A : 1s^2, 2s^2, 2p^6$
$B : 1s^2, 2s^2, 2p^6, 3s^2, 3p^3$
$C : 1s^2, 2s^2, 2p^6, 3s^2, 3p^5$
Medium
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