Select the correct answer from the choices A, B, C and D which are given.
Write only the letter corresponding to the correct answer.
A compound which liberated reddish brown gas around the anode during electrolysis in its molten state is:
Sodium chloride
Copper (II)oxide
Copper (II)sulphate
Copper (II)sulphate
Select the correct answer from the choices A, B, C and D which are given.
Write only the letter corresponding to the correct answer.
A compound which liberated reddish brown gas around the anode during electrolysis in its molten state is:
Sodium chloride
Copper (II)oxide
Copper (II)sulphate
Copper (II)sulphate
Select the correct answer from the choices A, B,C and D which are given.
Write only the letter corresponding to the correct answer.
Which one of the following is not true of metals:
Metals are good conductors of electricity.
Metals are malleable and ductile.
Metals from non-polar covalent compounds.
Metals from non-polar covalent compounds.
Select the correct answer from the choices A,B,C and D which are given.
Write only the letter corresponding to the correct answer.
Aqua regia is a mixture of:
Dilute hydrochloric acid and concentrated nitric acid.
Concentrated hydrochloric acid and dilute nitric acid.
Concentrated hydrochloric acid [1 part ]and concentrated nitric acid [3].
Concentrated hydrochloric acid [1 part ]and concentrated nitric acid [3].
An element has an atomic number 16, state
i) the period to which it belongs.
ii)The number of valences electrons.
iii) whether it is a metal or non-metal:
Define the following term:
Electron affinity
Electron affinity is the amount of energy released. While converting a neutral gaseous isolated atom into a negatively charged gaseous ion when an extra gaseous electron is added to the atom.
Select from the list given(A to E) one substance in each case which matches the description give(Note :each substance is used only once in the answer) (A) Nitroso Iron (II) sulphate (B) Iron(III) chloride (C) chromium sulphate (D) lead (II) chloride (E )sodium chloride.
i) A compound which is deliquescent
ii) A compound which is insoluble in cold water, but soluble in hot water
iv) a compound whose aqueous solution is neutral in nature.