Carbon and its Compounds — Science STD 10 — Question

The process of reduction involves:

The substance which can produce brisk effervescence with baking soda solution is:

Which of the following is not a property of an alkali?

You have four test tubes, A, B, C and D containing sodium carbonate, sodium chloride, lime water and blue litmus solutions respectively. Out of these the material of which test tube/test tubes would be suitable for the correct test of acetic/ethanoic acid?

Which of the following metals are extracted by the electrolysis of their molten chlorides?

1. Na and Hg.
2. Hg and Mg.
3. Na and Mg.
4. Cu and Fe.

Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?

Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?

1. Group 8.
2. Group 2.
3. Group 18.
4. Group 10.

The colour of the solution observed after 30 minutes of placing zinc metal to copper sulphate solution is

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

1. FeO
2. Fe₂O₃
3. Fe₃O₄
4. Fe₂O₃ and Fe₃O₄