THE S-BLOCK ELEMENTS Quiz-1

Chemistry Aptitude Quiz

Dear Readers,

Important topics for Chemistry have been designed in such a way that it offers very practical and application-based learning to further make it easier for students to understand every concept or topic by correlating it with the experiences.

Q1. Select the correct statement(s)

•  Presence of MgCl2 in table salt causes it to clump
•  Addition of NaHCO3 to table salt converts MgCl2 to non-hygroscopic salt
•  Both (a) and (b)
•  None of the above

Solution
c part

Q2.TIn which of the following the hydration energy is higher than the lattice energy?

•   BaSO4
•  MgSO4
•  RaSO4
•  SrSO4

Solution
b part

Q3.  Select the correct statement(s)

•   Beryllium and magnesium hydride are covalent and polymeric
•  CaH2, SrH2 and BaH2 are ionic
•  BeH2 contains three-centre two-electron bond
•  All of the above are correct statements

Solution
d part

Q4. A metal M readily forms water soluble MSO4. It also forms oxide MO which becomes inert on heating. Hydroxide MOH2 is insoluble in water but soluble in NaOH solution. What is M?

•  Mg
•  Ba
•  Ca
•  Be

Solution
d part

Q5. Slaked lime and chlorine reacts to produce

•  Quicklime
•  CaCl2
•  CaoCl2
•  Mixture of CaCl2 and CaOCl2

Solution
 CaOH2+Cl2→CaOCl2+CaCl2 D part

Q6. Identify the correct statement

•   Plaster of Paris contains higher percentage of calcium than does gypsum
•  Gypsum is obtained by heating plaster of Paris
• Plaster of Paris can be obtained by hydration of gypsum
•  Plaster of Paris obtained from gypsum by oxidation

Solution
A part

Q7. Alkaline earth metals are

•  Reducing agent
•  Dehydrating agent
•  Amphoteric
•  Oxidizing agent

Solution
(a) part Due to low (IE) and most negative E° values

Q8. A compound which can be used in space vehicles both to absorb CO2 and liberate O2 is

•  NaOH
•  TNa20
•  Na2O2
•  CaO + NaOH

Solution
(c) part 2Na2O2+2CO2→2Na2CO3+O2

Q9. Which of the following is not used as food preservatives?

•  NaCl
•  CH3COOH
•  C6H5COONa
•  HCHO

Solution
(d)Part HCHO is used as preservatives of dead biological specimen

Q10. Which is used in the treatment of manic-depressive disorders?

•  Na2CO3
•  LiCO3
•   K2CO3
• MgCO3

Solution
b Part