Question

( any 10 ) Gimme extra/important Questions of chapter 3rd - Metals and non metals...Class 10th ​

Answer 1

Answer:

1.  A metal ‘X’ loses two electrons and a non-metal ‘Y’ gains one electron. Show the electron dot structure of compound formed between them. Is ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?

2.  A student was given Mn, Zn, Fe and Cu metals. Identify which of them      (a) will not displace H2 from dil. HCl.      (b) will react only with steam to give H2(g).      (c) Will give H2 with 5% HNO3.      Write the chemical reactions involved.

3.  Compound X and aluminium are used to join railway tracks.      (a) Identify the compound X.      (b) Name the reaction.      (c) Write down its reaction.

4.  Samples of five metals ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ were taken and added to the following solution oneby one. The results obtained have been tabulated as follows.Metal FeSO4 CuSO4 ZnSO4 AgNO3 Al2(SO4)3 MgSO4A No reaction Displacement No reaction Displacement No reaction No reactionB Displacement Displacement No reaction Displacement No reaction No reactionC No reaction No reaction No reaction Displacement No reaction No reactionD No reaction No reaction No reaction No reaction No reaction No reactionE Displacement Displacement Displacement Displacement No reaction No reactionUse the above table to answer the following questions about the given metals.(a) Which of them is most reactive and why?(b) What would you observe if ‘B’ is added to CuSO4?(c) Arrange ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ in the increasing order of reactivity.(d) Container of which metal can store zinc sulphate and silver nitrate solution?(e) Which of the above solution(s) can be stored in a container made of any of these metals andwhy?

5.  A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which isamphoteric in nature? Identify A and B. Write down the reactions of oxide B with HC1 and NaOH.Page 2

6.  A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B istoxic whereas C causes global warming.(a) Identify A, B and C.(b) To which group of periodic table does A belong?

7.  An element A reacts with water to form a compound B which is used in white washing. The compoundB on heating forms an oxide which on treatment with water gives back B. Identify A, B and C andgive the reactions involved.

8.  A non-metal A which is the largest constituent of air, when heated with H2 in 1 : 3 ratio in the presence of catalyst (Fe) gives a gas B. On heating with O2, it gives an oxide C. If this oxide is passed into water in the presence of air, it gives and acid D which act as a strong oxidising agent.(a) Identify A, B, C and D.(b) To which group of periodic table does this non-metal belong?

9.  An element A burns with golden flame in air. It reacts with another element B, atomic number 17 togive a product C. An aqueous solution of product C on electrolysis gives a compound D andliberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved.

Explanation:

Answer 2

Answer:

$\huge\mathfrak{questions\:}$

a) What are amphoteric oxides?

b) Why is it that non-metals do not displace hydrogen from dilute acids?

c)Choose the amphoteric oxides from amongst the following oxides:

ZnO, Al2O3, CO2,

d)why is sodium kept immersed in karocsene oil?

e)What is meant by refining of a metals?

f)Distinguish between an ionic and covalent compound .

g) why do ionic compounds have high melting point?

h)name the two metals which are found in free State in space.

I) what are alloys?

j) write two ways to prevent the roasting of iron ,

k)give reason,why copper is used to make hot water tank and not steel ?