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Why copper does not liberate hydrogen from dilute acids?
chemical name of Na2Zno2
what is process of manufacturing of vanaspati ghee and what is it called?
Hydrogen is relatively inert at room temperature due to high HH bond enthalpy.what does this statement mean?explain it in detail.
hydrogen is a combustible gas but it does not support combustion. what does this mean?
what is ammoniacal copper (1) chloride? how is it prepared?what are its properties and uses?
why is kipps apparatus for producing hydrogen sulphide is soecially designed
Is Hydrogen soluble in water?
can explain me about reactivity series of metals
why is hydrogen gas used as rocket fuel?
what is h-h bond enthalpy?
What is haber process
1-Why should the thistle funnel be completely immersed in the solution of copper sulphate and dilute sulphuric acid during the laboratory preparation of hydrogen?
2.Why is the nitri acid not used in the laboratory preparation of hydrogen?
what is an endothermic reaction?
can u please give me the reactivity series of metals table?
why is hydrogen insoluble in water?
Name the following-
1.A metal which is used as reactant in the laboratory preparation of hydrogen-
2-A metal which floats on the surface of cold water and reacts with it to form hydrogen gas-
3.A metal which sinks in cold water and reacts with it to form hydrogen gas-
Question 1. Why has helium gas replaced hydrogen in weather observation ballons?
Question 2. Why there a pop sound when hydrogen is burnt?
why is hydrogen used as a fuel in space rockets
If hydrogen is present in free state as mixed in natural gasof coal mines then how is it in a free state this is given in revision notes.(chemistry class 8 hydrogen revision notes occurence of hydrogen in free state). ?
why hydrogen gas is highly inflammable?
How we will test hydrogen gas ?
Give an essay on "hydrogen as a future source of energy."
why water and concentrated sulphuric acid is used to produce hydrogen with zinc?
why hydrogen is not available in atmosphere in free state?
2Mg(s)+ 2H2O(g)→ MgO(s)+ H2(g)
Please tell the meaning of s and g which is in subscript enclosed in the brackets.
what is sodium arsenite solution?explain wih its uses, properties ,formula and way of prepration?
name 3 metal which react with cold water to form hydrogen. support your answer with fully balanced chemical equation.
what is co.cucl.2h2o
What is meant by combustible but not a supporter of combustion?
Can hydrogen be used in its pure form? Is it safe while using it in its pure form?
please explain me about habers process
i didnt understand stage3 in bosch process please explain fast
what is the difference between nuclei nucleus.
why can hydrogen be used as fuel ?
why is acetic acid a weak acid and hydrochloric acid a strong acid
what is enthalpy?
What is Nascent hydrogen?
I have ead 70% of univese is made of hydrogen but how could scientist tell 70% is made of hydogen
Fe (s) + H2SO4 (aq) → FeSO4 (aq) + H2 (g). What is the meaning of'(s)' and '(g)' in the equation?
Meritnation Support is down... I had sent an email to firstname.lastname@example.org for some inclusion of lessons. I had recieved an email fromapplect learning systems stating that i have successfully registered into their support system. I went to support.meritnation.net but it 's down. Not at all working.... Please solve as soon as possible!!
Name the metals which can not displace hydrogen from wqter or acids and state the metal position in the metal activity series.
Why hydrogen is called as first element of periodic table ?
i am not able to see the 3d animations. and i also want the last years old look for the MCQ test.
PLEASE CHECK IT
what is osmium tetroxide
how to quit the account?
What is H-H bond enthalpy?
why is granulated zinc preferred in the laboratory preparation of hydrogen?
pls give answer in class 8 way
Is Tungsten (Wolfram) a good conductor or bad conductor of Electricity?Why?
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