SOME BASIC CONCEPTS OF CHEMISTRY Quiz-11

 

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-11

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.Test of this anion is not performed in glass test tubes. This anion is  :

•  F^-
•  AsO_4^(3-)
•  PO_4^(3-)
•  BO_3^(3-)

Solution

Q2.A 0.13 g of a specimen containing MnO_2 is treated with iodide ions. If iodine liberated

•  75.3%
•  85.3%
•  95.3%
•  None

Solution

Q3.One equivalent of magnesium oxide weighs 20 g then one equivalent of magnesium chloride weighs  

•  29.75 g
•  47.5 g
•  95.0 g

Solution

Q4.A20 mL of x M HCl neutralisses completely 10 mL of 0.1 M NaHCO_3 solution and a further 5 mL of 0.2 M Na_2 CO_3 solution to methyl orange end point. The value of x is 

•  0.167 M
•  0.133 M
•  0.15 M
•  0.2 M

Solution

Q5.When 2.76 g of silver carbonate is strongly heated, it yields a residue weighting

•  

  2.16 g

•  2.48 g
•  2.32 g
•  2.64 g

Solution
 

Q6.If 20 mL of 0.1 M K_2 Cr_2 O_7 is required to titrate 10 mL of a liquid iron supplement, then the concentration of iron in the vitamin solution is

•  1.2 M
•  2.4 M
• 0.6 N
•  1.56 M

Solution

Q7.A metal displaced 16.8 mL of H_2 (in standard conditions) from an acid. Volume of N_2 needed to combine with this amount of H_2 into NH_3 is

•  11.2 mL
•  5.6 mL
•  8.4 mL
•  22.4 mL

Solution

Q8.0.5 g of a mixture of K_2 CO_3 and Li_2 CO_3 requires 30 mL of 0.25 N-HCl solution for neutralisation. The percentage composition of the mixture is

•  96%K_2 CO_3,4% Li_2 CO_3
•  4%K_2 CO_3,96% Li_2 CO_3
•  48%K_2 CO_3,52% Li_2 CO_3
•  52%K_2 CO_3,48% Li_2 CO_3

Solution

Q9. The Mw of a oxide of an element is 44. The Ew of the element is 14. The atomic weight of the element is

•  14
•  28
•  42
•  56

Solution

Q10. Which of the following are soluble in excess of NaOH (X):As_2 S_3 ;(Y):CuS ;(Z): AlCl_3?  

•  X,Y,Z
•  b) Y,Z
•  X,Z
• X,Y

Solution

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