CBSE Class 10 Chemistry Hots-Metals and Non Metals. Higher Order Thinking Skills (HOTS) are part of the CBSE syllabus and form part of examinations. Students are requested to learn the HOTs for various subjects to score better in examinations, This portal has collection of important HOTs for all subjects and classes which have been made by experienced school teachers. Students should download and learn the HOTS.
CHAPTER No. 3
METALS AND NON METALS HOTS: (High Order Thinking Skill)
Questions with Answers:
Que1: Carbon can reduce copper oxide to copper but not calcium oxide to calcium. Why?
Ans: Carbon is a strong reducing agent so it can reduce copper oxide but calcium is much more reactive than copper and has greater affinity for oxygen than carbon has. So it cannot reduce calcium oxide to calcium.
2. A yellow coloured powder `X` is soluble in carbon disulfide. It burns with a blue flame forming suffocating smelling gas which turns moist blue litmus red. Identify `X` and gives chemical reaction. Identify it is metal or nonmetal.
Ans 2:`X` is sulphur S + O2 -> SO2 It is non metal.
Que3. Nikita took Zn, Al, Cu, Fe, Mg, Na metals & put each metal in cold water and then hot water. She reacted the metal with steam
(i) Name the metal which reacts with cold water.
(ii) Which of the above metals react with steam?
(iii) Name the metal which reacts with hot water.
(iv) Arrange these metals in order of increasing reactivity.
Ans.3 (i) Na (ii) Al, Zn, Fe (iii) Mg (iv) Na>Mg> Al > Zn > Fe > Cu
Que4. A student was given Mg, Zn, Fe, and Cu metals. He put each of them in dil HCl contained in different test tubes. Identify which of hem
(i) will not displace H2 from dil HCl
(ii) forms a pale green substance
(iii) will give H2 with 5% HNO3
(iv) will be displaced from its salt solution by all other metals.
Ans4: (i) Cu (ii) Fe (iii) Cu (iv) Cu
Please refer to link below for CBSE Class 10 Chemistry Hots-Metals and Non Metals.
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