Metallurgy — Chemistry STD 12 — Question

The overall order of the reaction 5Br– + BrO3– + 6H+ is ……..

A certain current liberated 0.504 gm of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time through copper sulphate solution.

The yellow colour in NaCl crystal is due to ____________.

Which one of the following is an example for Frenkel defect?

Consider the following statements.
(i) Amines have higher boiling point than alcohols.
(ii) Lower aliphatic amines are colourless gases whereas higher amines have fish like small.
(iii) Aniline and arylamines are colourless but when exposed to air they become coloured due to oxidation.
Which of the above statement(s) is / are correct?

Assertion(A): Aldehydes and ketones have high dipole moment.
Reason (R): The carbonyl group of aldehydes and ketones contain a double bond between carbon and oxygen. Oxygen is more electronegative than carbon and it attracts the shared pair of electron which makes the carbonyl group as polar.

Which one of the following graph is not correct ………..

The base adenine present in …………….

What is the name of the reaction between ethanol and ethanoic acid?