JEE Chemistry Solved Question Paper 2013 | Previous Year Papers | Zigya

Subject

Chemistry

Class

JEE 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
1.

The value of entropy of solar system is

  • Increasing

  • decreasing

  • constant

  • zero


2.

The number of water molecules present in a drop of water weighing 0.018 g is

  • 6.022 × 1026

  • 6.022 × 1023

  • 6.022 × 1019

  • 6.022 × 1020


3.

Empirical formula of a compound is CH2O and its molecular mass is 90, the molecular formula of the compound is

  • C3H6O3

  • C2H4O2

  • C6H12O6

  • CH2O


4.

Hybridised states of carbon in graphite and diamond are respectively

  • sp3, sp3

  • sp3, sp2

  • sp2, sp2

  • sp, sp3


Advertisement
5.

The mass of 112cm3 of NH3 gas at STP is

  • 0.085g

  • 0.850g

  • 8.500g

  • 80.500g


6.

The yield of the products in the reaction A2(g) + 2B(g) C(g) + kJ would be higher at

  • high temperature and high pressure

  • high temperature and low pressure

  • low temperature and high pressure

  • low temperature and low pressure


7.

Which of the following gases has the highest value of RMS velocity at 298 K?

  • CH4

  • CO

  • Cl2

  • CO2


8.

Given thermochemical equation, 2H2 (g) + O2(g) → 2H2O,ΔH = -571.6 kJ. Heat of decomposition of water is

  • -571.6 kJ

  • +571.6 kJ

  • -1143.2 kJ

  • + 285.8 kJ


Advertisement
9.

An example for a neutral buffer is

  • ammonium hydroxide and ammonium chloride

  • acetic acid and sodium acetate

  • acetic acid and ammonium hydroxide

  • citric acid and sodium citrate


10.

Conjugate base of H2PO42-

  • H3PO4-

  • HPO42-

  • H3PO4

  • PO43-


Advertisement