SOME BASIC CONCEPTS OF CHEMISTRY Quiz-10

SOME BASIC CONCEPTS OF CHEMISTRY Quiz-10

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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.NH_3 is formed in the following steps I. Ca+2C→CaC_2 50% yield II. CaC_2+N_2→CaCN_2+C 100% yield III. CaCN_2+3H_2 O→2NH_3+CaCO_3 50% yield To obtain 2 moles NH_3, calcium required is  :

•  1 mol
•  2 mol
•  3 mol
•  4 mol

Solution

Q2.When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is

•  1:1
•  1:2
•  2:1
•  9:4

Solution

Q3.Acidified MnO_4^- can be decolourised by  

•  CaC_2 O_4
•  H_2 O_2
•  FeSO_4
•  All of these

Solution
OPTION D

Q4.An element A (atomic weight = 12) and B (atomic weight = 35.5) combines to form a compound X. If 4 mol of B combines with 1 mol of A to give 1 mol of X. The weight of 1 mol of X would be 

•  47.5 g
•  74.0 g
•  154.0 g
•  148.8 g

Solution

Q5.The density of 1 M solution of NaCl is 1.0585 g/mL.The molality of the solution is

•  

  1.0585

•  1.00
•  0.10
•  0.0585

Solution
 

Q6.KMnO_4reacts with oxalic acid according to the equation 2MnO_4^-+〖5C〗_2 O_4^2+16H^+→2Mn^(2+)+10CO_2+8H_2 O Here 20 mL of 0.1 M KMnO_4is equivalent to

•  20 mL of 0.5 M C_2 H_2 O_4
•  50 mL of 0.1 M C_2 H_2 O_4
• 50 mL of 0.5 M C_2 H_2 O_4
•  20 mL of 0.1 M C_2 H_2 O_4

Solution

Q7.Which of the following substances contains greatest mass of chlorine?

•  5.0 g Cl_2
•  0.5 mol Cl_2
•  0.10 mol KCl
•  30.0 g MgCl_2

Solution

Q8.What mass of CO_2 could be formed by the reaction of 16 g CH_4with 48 g ofO_2?

•  44 g
•  33 g
•  16 g
•  24 g

Solution

Q9. At 100℃ and 1 atm, if the density of the liquid water is 1.0 g cm^(-3) and that of water vapour is 0.00006 g cm^(-3), then the volume occupied by water molecule in 1 L steam at this temperature is

•  6 cm^3
•  60 cm^3
•  0.6 cm^3
•  0.06 cm^3

Solution

Q10. If 0.5 mole of BaCl_2 is mixed with 0.20 mole of Na_3 PO_4, the maximum number of moles of Ba_3 (PO_4 )_2 then can be formed is  

•  0.1
•  0.2
•  0.5
• 0.7

Solution

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