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

1.

The value of Planck's constant is 6.63 x 10-34 Js. The speed of light is 3 x 1017 nms-1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 x 1015 s-1?

  • 10

  • 25

  • 50

  • 75


2.

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? n = 3, l = 1 and m =-1.

  • 10

  • 6

  • 4

  • 2


3.

Based on equation E = -2.178 × 10-18 J Z2n2 certain conclusions are written. Which of them is not correct?

  • The negative sign in equation simply means that the energy of electron bound to the nucleus is lower than it would be if the electrons were at the infinite distance from the nucleus.

  • Larger the value of n, the larger is the orbit radius

  • Equation can be used to calculate the change in energy when the electron changes orbit.

  • For n = 1 the electron has a more negative energy than it does for n = 6 which means that the electron is more loosely bound in the smallest allowed orbit.


Advertisement

4.

How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0M HNO3 ? The concentrated acid is 70% HNO3.

  • 45.0 g conc. HNO3

  • 90.0 g con. HNO3

  • 70.0 g conc. HNO3

  • 54.0 g conc. HNO3


A.

45.0 g conc. HNO3

Given, molairty of solution = 2Volume of solution = 250 mL =2501000=14LMolar mass of HNO3= 1 +14+ 3 ×16 = 63 g mol-1therefore, Molarity= weight of HNO3mass of HNO3× volume of solution (L)therefore,weight of HNO3 = molarity × mol. mass × volume(L)                              = 2 ×63×14g = 31.5 gIt is the weight of 100% HNO3.But the given acid is 70% HNO3therefore, Its weight = 31.5 × 10070g = 45 g


Advertisement
Advertisement
5.

Maximum deviation from ideal gas is expected from

  • H2(g)

  • N2(g)

  • CH4(g)

  • NH3(g)


6.

Dipole-induced dipole interactions are present in which of the following pairs?

  • H2O and alcohol

  • Cl2 and CCl4

  • HCl and He atoms

  • SiF4 and He atoms


7.

Which of  the following structure is similar to graphite?

  • CO

  • O2-

  • CN-

  • NO+


8.

XeF2 is isostructural with

  • TeF2

  • ICl2-

  • SbCl3

  • BaCl2


Advertisement
9.

An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. The number of moles of AgCl precipitate would be

  • 0.001

  • 0.002

  • 0.003

  • 0.01


10.

Which ofthese is least likely to act as a Lewis base?

  • CO

  • F-

  • BF3

  • PF3


Advertisement