Subject

Chemistry

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement

11.

At 900C , pure water has [H+]=10-6 M , if 100 mL of 0.2 M HCl is added to 200mL of 0.1 M KOH at 90°C then pH of the resulting solution will be:

  • 5

  • 6

  • 7

  • 4


B.

6

20 meq. of HCl reacts completely with 20 meq. of KOH.Therefore, the final solution is neutral. Thus, at 90°C (pH= logH+) hence, pH= 6.


Advertisement
12.

A light greenish coloured salt was soluble in water. On passing H2S into the solution a black precipitate was obtained which dissolved readily in HCl The metal ion present is:

  • Co2+

  • Fe2+

  • Ni2+

  • Mn2+


13.

The E-isomer among the following is:


14.

Arrange the following in the decreasing order of their melting points:
I. Heptane      II. Octane
III. Nonane     IV. Decane

  • IV > II > III > I

  • IV > III > I > II

  • I > II > IV > III

  • II > III > I > IV


Advertisement
15.

Photochemical oxidants, i.e. PAN or PBN are formed by:

  • action of nitrogen oxides on hydrocarbons in presence of sunlight

  • action of CO2 on hydrocarbons in presence of sunlight

  • action of hydrogen sulphide on hydrocarbon in presence of sunlight

  • None of the above


16.

A salt on reacting with dil. H2S04 gives a reddish brown gas. The salt is:

  • KNO2

  • ZnBr2

  • NaNO3

  • FeCl3


17.

Which of the following reactions depicts the reducing action of H2O2 ?

  • C6H6 + H2O2  C6H5OH + H2O

  • 2I- + 2H+ + H2O2  I2 + H2O

  • 2MnO4- + 6H+ +5H2O2 2Mn2+ + 5O2 + 8H2O

  • PbS + 4H2O2  PbSO4 + 4H2O


18.

Which of the following statements is correct with respect to the property of elements with increase in atomic number in the carbon family (group 14)?

  • Their metallic character decreases

  • The stability of +2 oxidation state increases

  • Their ionization energy increases

  • Their atomic size decreases


Advertisement
19.

Aluminium vessels should not be washed with material containing washing soda since:

  • washing soda is expensive

  • washing soda is easily decomposed

  • washing soda reacts with Al to form insoluble aluminium oxide

  • washing soda reacts with Al to form soluble aluminate


20.

Which of the following alkaline earth metal oxides shows a coordination number four?

  • BeO

  • MgO

  • SrO

  • CaO


Advertisement