This MCQ test includes the chapters- Periodic Properties and variations of Properties, Chemical Bonding, Study of Acids, Bases and Salts, Analytical Chemistry, Mole concept and stoichimetry and electrolysis
It is of 40 Marks and is of 60 mins.
Results
#1. If the empirical formula of a compound is CH and it has a vapour density of 13, find the molecular formula of the compound.[C=12, H=1]
#2. The acid formed when P2O5 dissolves in water
#3. Why carbon tetrachloride does not conduct electricity?
#4. Identify the strong electrolyte among the following
#5. The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr and Ba.Which one of these elements will form ions most readily
#6. Arrange Cs, Na, Li, K, Rb (increasing order of metallic character).
#7. Identify the basic oxide
#8. Identify the oxide which dissolves in water forming an acid.
#9. Metals are good ______ (oxidising agent/ reducing agent) because they are electron _____ (acceptor/ donors).
#10. Identify the gas evolved when dilute hydrochloric acid reacts with sodium sulphite.
#11. During electrolysis of copper sulphate solution using Pt electrode, _____ deposition occur at the cathode and ______ gas evolved at the anode.
#12. Colour of phenolphthalein in acidic medium
#13. Which of the following is not the property of ionic compound
#14. Predict the nature of the compound
#15. Atomic number of an element is 20. How many valence electrons does this element have?
#16. Atomic number of an element is 20.To which period and group does it belong?
#17. The element which possess least % composition in Na2S2O3. [Na=23, S=32, O=16]
#18. Calculate the empirical weight of the compound formed by 35/17% K, 28.84% S and the rest O.[K=39, S=32, O=16]
#19. A black coloured compound (A) when reacted with sulphuric acid produces a blue colour solution of salt (B).
#20. Arrange O, Be, C, N [ Increasing order of Reducing property]
#21. Identify A
#22. During the electrolysis of molten lead bromide ________ crucible is used.
#23. Number of single covalent and double covalent bond found in ethene is
#24. The acid formed when Cl2O7 dissolves in water.
#25. Why ionic or electrovalent compounds are good conductors of electricity in fused or in an aqueous state?
#26. The neutral oxide among the following
#27. In Period 3, the most metallic element is ________.
#28. In Na2ZnO2, arrange the elements in the increasing order of % composition. [Na=23, Zn=65, O=16]
#29. A compound contains 20.57% Na, 29.26% Zn, 28.69% S and 21.48% O. Its molecular weight is 223. The M.F is [Na=23, Zn=65, S=32, O=16]
