SOME BASIC CONCEPTS OF CHEMISTRY Quiz-4

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-4

Dear Readers,

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..

Q1. When 80 mL of 0.20 M HCl is mixed with 120 mL of 0.15 M KOH,the resultant solution is the same as a solution of  :

•  0.16 M KCl and 0.02 M HCl
•  0.08 M KCl
•  0.08 M KCl and 0.01 M KOH
•  0.08 M KCl and 0.01 M HCl

Solution

Q2.5.6 g of a metal forms 12.7 g of metal chloride. Hence equivalent weight of the metal is

•  127
•  254
•  56
•  28

Solution

Q3.Which of the following salts does not give positive test for nitrate ion?  

•  KNO_3
•  NaNO_3
•  Pb(NO_3 )_2
•  Mg(NO_3 )_2

Solution

Q4.27 g of Al will react completely with …….. g of O_2 

•  8 g
•  10 g
•  24 gl
•  49 g

Solution

Q5.Test tube A contains ZnCl_2 aqueous solution while test tube B contains aq CdCl_2 solution. On passing H_2 S gas

•  ZnS is precipitated
•   CdS is precipitated
•  Both (a) and (b) are precipitated
•  None of the above is precipitated

Solution
 

Q6. A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (III) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

•  Pb^(2+)
•  Hg^(2+)
• Cu^(2+)
•  Co^(2+)

Solution

Q7.Mixture is initially orange in colour. When solution is prepared in dil. Acid, it changes to dark brown colour. Mixture contains

•  HgI_2,Cr_2 O_7^(2-)
•  I^-,Cr_2 O_7^(2-)
•  I^-,Cu^(2+)
•  I^-,SO_3^(2-)

Solution

Q8.When 100 mL of 0.1 M Ba(OH)_2 is neutralized with a mixture of x mL of 0.1 M HCl and y mL of 0.2 M H_2 SO_3 using methyl orange indicator, what is value of x and y?

•  200, 100
•  100, 200
•  300, 200
•  200, 300

Solution

Q9. A→B (gas) used by dentist. Hence, A is

•  NH_4 Cl
•  NH_4 NO_2
•  NH_4 NO_3
•  NH_4 OH

Solution

Q10. Borax on heating strongly above its melting point melts to a liquid, which then solidifies to a transparent mass commonly known as borax-bead. The transparent glassy mass consist of 

•  Sodium pyroborate
•  Boric anhydride
•  Sodium metaborate
• Boric anhydride and sodium metaborate

Solution
option d