give reasons why cooking utensils are made up of metals like copper, aluminium etc
is H2SO4 an ionic compound or a covalent compound? what is the electronic dot structure of H2SO4 ?
) Define an alloy. How are alloys prepared ? How do the properties of iron change when : (i) small quantity of carbon, (ii) nickel and chromium are mixed with it.
Write the electron dot structure for sodium and chlorine atoms. How do these form a chemical Bond? Name the type bond so formed why does a compound so formed have high melting point?
Why are metals sonorous? Which metal is the most sonorous?
explain giving equation, what happens when:
ZNCO3 is heated in the absence of air?
a mixture of CU2O and CU2S is heated?
A, B and C are three elements which undergo chemical reactions according to the following equations.
metals are good conductors of electricity wheereas non metals are not .give reason
metals replace hydrogen from acids whereas non metal do not. give reason
Explain how the following metals are obtained from their compounds by the reduction process.
1) metal X which is low in the reactivity series
2) metal Y which is the middle of the reactivity series
3) metal Z which is high in the reactivity series
.Give an eg of each
what is electrolytic reduction ???
How to remember REACTIVITY SERIES?
do u know how to keep reactivity series of metals in mind
Why Aluminium Oxide and Zinc Oxide is called Amphoteric Oxides?
Why hydrogen comes in reactivity series of metals????andHow reactivity of hydrogen can be found out????????
give reasons why cooking utensils are made up of metals like copper, aluminium etc
is H2SO4 an ionic compound or a covalent compound? what is the electronic dot structure of H2SO4 ?
) Define an alloy. How are alloys prepared ? How do the properties of iron change when : (i) small quantity of carbon, (ii) nickel and chromium are mixed with it.
Write the electron dot structure for sodium and chlorine atoms. How do these form a chemical Bond? Name the type bond so formed why does a compound so formed have high melting point?
Why are metals sonorous? Which metal is the most sonorous?
explain giving equation, what happens when:
ZNCO3 is heated in the absence of air?
a mixture of CU2O and CU2S is heated?
A, B and C are three elements which undergo chemical reactions according to the following equations.
A2O3 + 2 B → B2O3 + 2 A3 CSO4 + 2 B →B2 (SO4)3 + 3C.3 CO + 2 A →A2O3 +3 C.Answer the following questions.(a) Which element is the most reactive ?(b) Which element is the least reactive ?(c) Arrange A, B, and C in the form of reactivity series.metals are good conductors of electricity wheereas non metals are not .give reason
metals replace hydrogen from acids whereas non metal do not. give reason
Explain how the following metals are obtained from their compounds by the reduction process.
1) metal X which is low in the reactivity series
2) metal Y which is the middle of the reactivity series
3) metal Z which is high in the reactivity series
.Give an eg of each
what is electrolytic reduction ???
How to remember REACTIVITY SERIES?
do u know how to keep reactivity series of metals in mind
Why Aluminium Oxide and Zinc Oxide is called Amphoteric Oxides?
Why hydrogen comes in reactivity series of metals????
and
How reactivity of hydrogen can be found out????????