Question 13 Marks
Complete the table:
Questions
complete the Graph/Table.
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4 questions · timed · auto-graded
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Question 23 Marks
Complete the table:
Answer
View full question & answer→Molecular formulae of various compounds formed by hydrogen with other elements are given in the following table. From that, deduce the valencies of the concerned elements.
Question 33 Marks
Complete the table:
Answer
View full question & answer→Molecular formulae of some compounds are given in the following table. Use these to fill in the gaps in the table.
Question 43 Marks
Chemical composition of some matter is given in the following table. Identify the main type of matter from them.
Answer
View full question & answer→| Name of matter | Chemical composition | Main type of matter |
| Sea water | $H _2 O + NaCl + MgCl _2+\ldots$ | Mixture |
| Distilled water | $H _2 O$ | Compound |
| Hydrogen gas filled in a balloon | $H _2$ | Element |
| The gas in LPG cylinder | $C _4 H _{10}+ C _3 H _8$ | Mixture |
| Baking soda | $NaHCO _3$ | Compound |
| Pure gold | $Au$ | Element |
| The gas in oxygen cylinder | $O _2$ | Element |
| Bronze | $Cu + Sn$ | Mixture |
| Diamond | $C$ | Element |
| Heated white powder of blue vitriol | $CuSO_4$ | Compound |
| Limestone | $CaCO_3$ | Compound |
| Dilute hydrochloric acid | $HCl + H _2 O$ | Mixture |