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].
D.
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:
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.