s-Block Elements · Chemistry · AP EAPCET
MCQ (Single Correct Answer)
In Solvay process, $\mathrm{NH}_3$ is recovered when the solution containing $\mathrm{NH}_4 \mathrm{Cl}$ is treated with compound ' $X$ '. What is ' $X^{\prime}$ ?
Identify the correct statements from the following.
I. All alkaline earth metals give hydrides on heating with hydrogen.
II. Calcium hydroxide is used to purify sugar.
III. $\mathrm{BeCl}_2$ is a dimer in gaseous phase.Identify the correct statement from the following.
A. Among alkali metal ions, $\mathrm{Li}^{+}$has highest hydration enthalpy.
B. Boiling point of alkali metals increases from Li to Cs .
C. Density of K is less than that of Na and Rb .
D. Li has strong tendency to form superoxide.
The correct answer is
Consider the following
Statement - I : Both $\mathrm{BeSO}_4$ and $\mathrm{MgSO}_4$ are readily soluble in water.
Statement - II : Among the nitrates of alkaline earth metals, only $\mathrm{Be}\left(\mathrm{NO}_3\right)_2$ on strong heating gives its oxide, $\mathrm{NO}_2$ and $\mathrm{O}_2$.
The correct answer is
Which of the following statements are correct regarding lithium and magnesium?
I. They react slowly with water.
II. Their bicarbonates are solids.
III. Their chlorides are not soluble in ethanol.
IV. Their nitrates decompose easily on heating.
The correct option is
Which of the following orders are correct against the stated property?
I. $\mathrm{NaO}_2<\mathrm{KO}_2<\mathrm{RbO}_2<\mathrm{CsO}_2$ - stability
II. $\mathrm{Mg}(\mathrm{OH})_2<\mathrm{Ca}(\mathrm{OH})_2<\mathrm{Sr}(\mathrm{OH})_2$ - basic strength
III. $\mathrm{MgCO}_3<\mathrm{CaCO}_3<\mathrm{SrCO}_3$ - thermal stability
Which of the following statement is incorrect with reference to alkaline earth metals?
Which of the following, on thermal decomposition, form both acidic and basic oxides along with $\mathrm{O}_2$ ?
(i) $\mathrm{NaNO}_3$
(ii) $\mathrm{Ca}\left(\mathrm{NO}_3\right)_2$
(iii) $\mathrm{Be}\left(\mathrm{NO}_3\right)_2$
(iv) $\mathrm{LiNO}_3$
The correct option is
Which one of the following alkaline earth metals does not form hydride when it is heated with hydrogen directly?
Identify the correct statements from the following.
(A) $$\mathrm{BeSO}_4$$ is soluble in water.
(B) BeO is an amphoteric oxide.
(C) CO can be obtained by heating $$\mathrm{CaCO}_3$$ at $$1070-1270 \mathrm{~K}$$.
The pair of elements that form both oxides and nitrides, when burnt in air are
Assertion (A) MgSO$$_4$$ is readily soluble in water.
Reason (R) The greater hydration enthalpy of Mg$$^{2+}$$ ions overcome is lattice enthalpy.
Identify A and B from the following reaction,
$$\mathrm{NaNO}_3 \xrightarrow{\Delta} x A+y B$$
The main constituent of enamel on the surface of teeth is
Which of the following does not form double salts?
In the preparation of baking soda, H$$_2$$O and CO$$_2$$ in ratio ......... is used to react with Na$$_2$$CO$$_3$$.
Which metal oxide among the following gives H$$_2$$O$$_2$$ on treatment with dilute acid?
Assertion (A) K, Rb and Cs form superoxides.
Reason (R) The stability of superoxides increases from K to Cs due to decrease in lattice energy.
When borax is dissolved in water, it gives an alkaline solution. The alkaline solution consists the following products