SOME BASIC CONCEPTS OF CHEMISTRY Quiz-29

Some basic concepts of chemistry Quiz-29

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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.Disilane Si_2 H_x is analysed and found to contain 90.28% by weight silicon. Value of x is (Si=29)

•  2
•  3
•  4
•  6

Solution

Q2.Zinc pieces can added to acidified solution of SO_3^(2-). Gas liberated can

•  Turn lead acetate paper black
•  Turn lime water milky
•  Give both of the above tests
•  Give none of the above tests

Solution

Q3. 100 mL of a mixture of NaOH and NaSO_4 is neutralized by 10 mL of 0.5 M H_2 SO_4.Hence, amount of NaOH in 100 mL mixture is

•  0.2 g
•  0.4 g
•  0.6 g
•  1.0 g

Solution

Q4. 13.4 g of a sample of unstable hydrated salt Na_2 SO_4 〖XH〗_2 O was found to contain 6.3 g of H_2 O. The number of molecules of water of crystalisation is

•  5
•  7
•  2
•  10

Solution

Q5. 

•  Borax
•  Microcosmic salt
•  Both (a) and (b)
•  None of these

Solution
 

Q6. Molarity of Na_2 CO_3 solution formed in the above question will be

•  0.0244 M
•  0.0112 M
• 0.1500 M
•  0.1276 M

Solution

Q7. The volume strength of 1.5 N H_2 O_2solution is

•  8.4
•  4.2
•  16.8
•  5.2

Solution

Q8. Concentrated hydrochloric acid contains 37% HCl (by mass). The density of this solution is 1.18 g/mL. The molarity (conc. in mol L^(-1)) of solution is

•  10 M
•  12 M
•  13 M
•  14 M

Solution

Q9. 3.9 g of a mixture of aluminium and its oxide on reaction with aqueous solution of sodium hydroxide, gave 840 mL of a gas under standard conditions. Thus, aluminium content in the mixture is

•  3.225 g
•  0.675 g
•  1.35 g
•  2.70 g

Solution

Q10. The normality and volume strength of a solution made by mixing 1.0 L each of 5.6 vol and 11.2 vol H_2 O_2 solution are

•  1 N, 5.6 vol
•  1.5 N, 5.6 vol
•  1.5 N, 8.4 vol
• 1 N, 8.4 vol

Solution