SOME BASIC CONCEPTS OF CHEMISTRY Quiz-16

 

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-16

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..

Q1.100 mL of NaHC_2 O_4 required 50 mL of 0.1 M KMnO_4 solution in acidic medium. Volume of 0.1 M NaOH required by 100 mL of NaHC_2 O_4 is  :

•  50 mL
•  100 mL
•  125 mL
•  150 mL

Solution

Q2.For the reaction, Fe_2 O_3+3CO→2Fe+3CO_2, the volume of carbon monoxide required at STP to reduce one mole of ferric oxide is

•  22.4 dm^3
•  44.8 dm^3
•  67.2 dm^3
•  11.2 dm^3

Solution

Q3.In sodium carbonate bead test, chromium salts (green) change to coloured bead  

•  Yellow, PbCrO_4
•  Yellow, BaCrO_4
•  Yellow, Na_2 CrO_4
•  Orange, Na_2 Cr_2 O_7

Solution
option c

Q4.A salt which will turn dark on exposure to sunlight has the formula

•  K_2 C_2 O_4
•  CaCl_2
•  AgCl
•  Fe_4 [Fe(CN)_6]

Solution

Q5.The solution of sodium meta aluminate on boiling with ammonium chloride gives a white precipitate of

•  

  Al_2 O_3

•  AlCl_3
•  Al(OH)_3
•  NaAl(OH)_4

Solution
 

Q6.In the mixture of NaHCO_3 and Na_2 CO_3, the volume of a given HCl required is x mL with phenolphthaleiun indicator and further y mL required with methyl orange indicator. Hence, volume of HCl for complete reaction of NaHCO_3 is

•  2x
•  y
• x/2
•  (y-x)

Solution

Q7.A substance that will deliquesce in the normal laboratory atmosphere is

•  CuSO_4
•  NaOH
•  SiO_2
•  All of these

Solution
option a

Q8.What weight of a metal of equivalent weight 12 will give 0.475 g of its chloride?

•  0.12 g
•  0.24 g
•  0.36 g
•  0.48 g

Solution

Q9.If 0.5 g of a mixture of two metals A and B with respective equivalent weights 12 and 9 displace 560 mL of H_2 at STP from an acid, the composition of the mixture is

•  40% A, 60% B
•  60% A, 40% B
•  30% A, 70% B
•  70% A, 30% B

Solution

Q10.SiF_4 is hydrolysed by H_2 O forming  

•  H_2 SiF_6,H_4 SiO_4
•  H_2 SiF_4,H_2 SiF_6
•  H_2 SiF_6,H_2 SiO_3
• H_2 SiF_6,SiO_2

Solution

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