SOME BASIC CONCEPTS OF CHEMISTRY Quiz-6

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-6

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.The equivalent weight of a certain trivalent element is 20. Molecular weight of its oxide is  :

•  152
•  56
•  168
•  68

Solution

Q2.4.2 g of a metallic carbonate MCO_3 was heated in a hard glass tube and CO_2 evolved was found to have 1120 mL of volume at STP. The Ew of the metal is

•  12
•  24
•  18
•  15

Solution

Q3.

 

•  14 u
•  7 u
•   14 g
•  7 g

Solution

 

Q4.5.3 g of M_2 CO_3 is dissolved in 150 mL of 1 N HCl.Unused acid required 100 mL of 0.5 N NaOH.Hence, equivalent weight of M is 

•  23
•  12
•  24
•  13

Solution

Q5.A mixture on heating gave a gas used as an anaesthetic, 1.1 g of gas occupies 0.56 L at NTP. Mixture contains

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Solution
 

Q6.Which is temperature independent?

•  Mass per cent
•  Volume per cent
• Mass/volume per cent
•  Molarity

Solution
(a) Any factor that is volume independent, is temperature independent

Q7.

•  40 mL
•  80 mL
•  20 mL
•  60 mL

Solution

Q8.0.3 g platinichloride of an organic diacidic base left 0.09 g of platinum on ignition. The molecular weight of the organic base is

•  120
•  240
•  180
•  60

Solution

Q9. Passing H_2 S gas into a mixture of Mn^(2+),Ni^(2+),Cu^(2+) and Hg^(2+) ions in an acidified aqueous solution precipitates

•  CuS and HgS
•  MnS and CuS
•  MnS and NiS
•  NiS and HgS

Solution

Q10. Equivalent weight of H_3 PO_2 (molecular weight=M) when it disproportionates into PH_3 and H_3 PO_3 isf 

•  M
•  M/2
•  M/4
• 3M/4

Solution

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