Please select a subject first
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State your observations when Barium chloride solution is mixed with Sodium Sulphate Solution.
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Match the salts given in Column I with their method of preparation given in Column II.
| Column I | Column II | ||
| 1 | Pb(NO3)2 from PbO | A | Simple displacement |
| 2 | MgCl2 from Mg | B | Titration |
| 3 | FeCl3 from Fe | C | Neutralization |
| 4 | NaNO3 from NaOH | D | Precipitation |
| 5 | ZnCO3 from ZnSO4 | E | Combination |
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Name the compound added to pure alumina to lower the fusion temperature during the electrolytic reduction of alumina.
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Select from the list the gas that matches the description given in case
[ammonia, ethane, hydrogen chloride, hydrogen sulfide, ethyne]
This gas produces dense white fumes with ammonia gas.
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Give appropriate scientific reasons for Zinc oxide can be reduced to zinc metal by using
carbon, but aluminium oxide cannot be reduced by a reducing agent
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Give appropriate scientific reasons for Carbon tetrachloride does not conduct electricity.
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Explain the bonding in methane molecule using electron dot structure.
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Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
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Name the following:
The property of element by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
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An element L consists of molecules.
What type of bonding is present in the particles that make up L?
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An element L consists of molecules.
When L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?
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State your observation When excess sodium hydroxide is added to calcium nitrate solution
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Give balanced chemical equation to prepare the following salt:
Copper chloride using copper carbonate
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The percentage composition of a gas is Nitrogen 82.35%, Hydrogen 17.64%. Find the empirical formula of the gas. [N = 14, H = 1]
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What are the conditions necessary for the formation of covalent molecules?
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What is the difference between ionic compounds and polar covalent compounds?
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What is the difference between ionic compounds and covalent compounds?
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What do you understand by polar covalent compounds?
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Methane molecule is non-polar molecule. Explain.
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