C(s)+O2(g)→CO2(g)+400 kJC(s)+\(\frac{1}{2}\) O2(g)→CO(s)+100 kJWhen coal of purity 60% is allowed to burn in presence of insufficient oxygen, 60% of carbon is converted into ‘CO’ and the remaining is converted into ‘CO2’. The heat generated when 0.6 kg of coal is burnt is _______.
Given below are the critical temperatures of some of the gases :
The gas showing least adsorption on a definite amount of charcoal is
Match List-I with List-II.
List-I (Metal)
List-II (Emitted light
wavelength (nm))
Choose the most appropriate answer from the options given below:
The number of paramagnetic species among the following is ____B2,Li2,C2,C-2, O22--,O2+ and He2+
20 mL of 0.02 M hypo solution is used for the titration of 10 mL of copper sulphate solution, in the presence of excess of KI using starch as an indicator. The molarity of \(Cu^{2+}\) is found to be ________ × \(10^{–2} M\). [nearest integer]
An organic compound ‘A’ on reaction with NH3 followed by heating gives compound B. Which on further strong heating gives compound C(C8H5NO2). Compound C on sequential reaction with ethanolic KOH, alkyl chloride and hydrolysis with alkali gives a primary amine. The compound A is :
Consider the above reaction. The number of π electrons present in the product ‘P’ is _____ .
When the excited electron of a H atom from n = 5 drops to the ground state, the maximum number of emission lines observed are ____.
