CBSE Class 11 Chemistry Worksheet - The s-Block Elements (1) CBSE,CCE and NCERT students can refer to the attached file. All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various schools. The study material available on our website for all CBSE classes and subjects have been prepared by teachers from all over the country. All study material has been carefully designed keeping into mind the latest CBSE examination trends.
J.E.E./A.I.P.M.T.Foundation - XI Chemistry Worksheet
Time: 30 min Ch#10: The s-Block Elements-01
Full Marks: 20
1. All questions are compulsory.
2. Please give the explanation for the answer where applicable.
Q1 - What is the general electronic configuration of the outermost shell of alkali metals? (1 Mark)
Q2 - What are the main sources of lithium? (1 Mark)
Q3 - Which alkaline earth metal forms covalent compound? (1 Mark)
Q4 - Alkali metals and their salts give characteristic colour of the flame. Explain? (2 Marks)
Q5 - A piece of burning magnesium ribbon continues to burn in SO2.why? (2 Marks)
Q6 - Beryllium and Magnesium do not give colour to the flame why? (2 Marks)
Q7 - When an alkali metal dissolves in liquid ammonia, the solution acquires different colours. Explain? (3 Marks)
Q8 - Comment on the following:
i) KO2 is paramagnetic.
ii) BeO is insoluble but BeSO4 is soluble in water.
iii) Lithium is the only alkali metal which forms nitride directly. (3 Marks)
Q9 - Discuss the position of alkali metals in the periodic table. Also discuss the trends in some important atomic and physical properties in the group. (5 Marks)
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