s-Block Elements (Alkali Metals, Alkaline Earth Metals)
Chemistry India Study Solution Test Series (Confidence Booster)
NEET, JEE Main, Advanced, IIT, AIIMS, NTSE | Engineering, BDS, MBBS Admission Test
Here we bring you a new series of practice questions from chemistry: s-Block Elements or Alkali Metals (Group 1 elements) and Alkaline Earth Metals (Group 2 elements).
Each set comprising carefully selected, 10 MCQ questions with hints & solutions (given at the end) from our Chemistry Solutions exclusively from Group-I and Group-II elements of Periodic Table.
In each set you will find a combination of typically important some basic and also advanced level questions very helpful in the preparation of NEET-UG, JEE Main & Advanced (IIT) AIIMS, IMS BHU, JIPMER, COMEDK, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.
Please scroll down to find NEET and JEE syllabus of s-Block elements.
Chemistry Practice Questions: s-Block Elements
(Group 1 Elements: Alkali Metals; Group 2 Elements: Alkaline Earth Metals)
India Study Solution MCQ Test Series – Set 1 (Q. No 1-10)
Question 1: Among the alkaline earth metals, the element forming predominantly covalent compound is:
a. Ba
b. Sr
c. Ca
d. Be
Question 2: CsOH is
a. Strongly basic
b. Weakly
c. Slightly acidic
d. Amphoteric
Question 3: Hydrogen is prepared from H2O by adding
a. Ca, which acts as reducing agent
b. Al, which acts as oxidising agent
c. Ag, which acts as reducing agent
d. Au, which acts as oxidising agent
Question 4: Which of the following statement is incorrect?
a. Mg and Ca both impact characteristic colour to the flame.
b. The metallic radius of Na is greater than that of Mg
c. Metallic bond of Mg is stronger than the metallic bond in Na
d. Melting point of Mg is greater than melting point of Ca.
Question 5: Based on lattice energy and other considerations which one of the following alkali metal chloride is expected to have highest melting point?
a. LiCl
b. NaCl
c. KCl
d. RbCl
Question 6: Which of the following has lowest melting point?
a. Li
b. Na
c. K
d. Cs
Question 7: Which of the following metals is used for drying organic solvents?
a. Magnesium
b. Sodium
c. Platinum
d. Nickel
Question 8: Select the incorrect option.
a. Sodium peroxide dissolves in water giving H2O2 and NaOH.
b. Both LiNO3 and NaNO3 on heating separately decompose and each liberates two gases NO2 and O2.
c. Solvay process cannot be used for the manufacture of potassium hydrogen carbonate.
d. Alkali metals are prepared only by the electrolysis of their fused chlorides.
Question 9: Which of the following element is responsible for oxidation of water to O2 in biological processes?
a. Cu
b. Mo
c. Fe
d. Mn
Question 10: The incorrect statement among the following is:
a. Beryllium hydroxide is amphoteric in nature.
b. Solubility of sulphates of second group elements decreases down the group.
c. Reducing power of hydride of alkali metal decreases down the group.
d. Beryllium has diagonal relationship with aluminium.
s-Block Elements (Syllabus for NEET and JEE):
General characteristics, electronic configuration, occurrence, anomalous properties of the first element of each group, diagonal relationship, trends in the variation of properties (such as ionization enthalpy, atomic and ionic radii), trends in chemical reactivity with oxygen, water, hydrogen and halogens; uses of the compounds of Group I Elements (Alkali Metals) and Group II Elements (Alkaline Earth Metals). Preparation and Properties of Some important Compounds: sodium carbonate, sodium chloride, sodium hydroxide and sodium hydrogen carbonate, biological importance of sodium and potassium. Anomalous behaviour of beryllium. Industrial use lime and limestone, biological importance of Mg and Ca.
>>>>>>>> <<<<<<<<
India Study Solution - Hints and Solutions Chemistry MCQ Test Series
s-Block Elements
(Group 1 Elements: Alkali Metals; Group 2 Elements: Alkaline Earth Metals)
Solutions of Chemistry Test Series (MCQ) – Set 1 (Q. No.1–10)
Answer 1: d. (Hint: Be has higher polarising power on account of smallest size of atom).
Answer 2: a. Answer 3: a.
Answer 4: a. (Hint: Mg does not impact colour to the flame but sodium gives golden yellow colour).
Answer 5: b. (Hint: On the basis of lattice energy, the melting point decreases in the alkali group as lattice energy decreases with the increase of the atomic number. However, LiCl has covalent character due to very small size of Li+ ion. Hence, melting point of NaCl is highest among the above chlorides).
Answer 6: d. (Hint: The metallic bond is purely the electric attraction between the mobile electrons and positive part of the atom, the kernel. This electrical attraction depends upon the (i) number of mobile electrons per atom and (ii) the size of the atom. The strength of metallic bond is weakest in Cs metallic lattice amongst these elements because of largest atomic radius).
Answer 7: b. Answer 8: b. Answer 9: d.
Answer 10: c. (Hint:
a. Beryllium hydroxide is amphoteric in nature as it reacts with acid and alkali both.
Be(OH)2 + 2OH → [Be(OH)4]2- (beryllate ion)
Be(OH)2 + 2HCl + 2H2O → [Be(OH2)4]Cl2.
b. The solubility of the alkaline earth metal sulphate decreases down the group from Be to Ba. This is because of the fact that down the group with increasing size of cation the lattice energy as well as hydration energy also decrease but the change in hydration energy is more as compare that of lattice energy.
c. Down the group, the bond dissociation enthalpies decrease from LiH to CsH. So reducing power of hydride of alkali metal increases down the group.
d. The ionic radius of Be2+ is estimated to be 31 pm; the charge/radius ratio is nearly the same as that of the Al3+ ion. Hence, beryllium has diagonal relationship with aluminium.
So, option c. is incorrect).
s-Block Elements (Alkali and Alkaline Earth Metals): More questions to follow
0 on: "s-Block Elements : India Study Solution Test Series, Chemistry objective questions for JEE, NEET, other admission tests"