A sample of carbon is placed in a rigid 1.50 L flask. Dinitrogen monoxide is added and the flask heated to 800C. When the system reached equilibrium the partial pressure of the carbon dioxide is found to be 0.030 atm and the partial pressure of the dinitrogen monoxide to be 1.48 atm. What is the partial pressure of nitrogen in the mixture.

1)  0.060 atm
2)  0.050 atm
3)  0.030 atm
4)  0.080 atm

The metal carbonate that is thermally least stable is

1)  BeCO₃

2)  BaCO₃

3)  CaCO₃

4)  MgCO₃

In a mixture, two enantiomers are found to be present in 85% and 15% respectively. The enantiomeric excess (e,e′) is :

1) 85 %

2) 15 %

3) 70 %

4) 60 %

The electronic spectrum of $$[Ni(H_2O)_6]^{++}$$ shows a band at $$ 8500\,cm^{-1}$$ due to d-d transition. $$[Ph_4As]_2[NiCl_4]$$ will have such a transition in $$cm^{-1}$$ at:

1) 8500
2) 3778
3) 4250
4) 850

The most efficient agent for the absorption of SO₃ is:

 1) 80% H₂S0₄.
2) 98% H₂S0₄.
3) 90% H₂S0₄.
4) 20% H₂S0₄

 Nitrobenzene on reaction with conc. HNO₃/H₂SO₄ at 80-100°C forms which one of the following products?

1) 1,2-dinitrobenzene
2) 1,3-dinitrobenzene
3) 1,4-dinitrobenzene
4) 1,2,4-trinitrobenzene

What willl be the mass of oxygen liberated by decomposition of 200 mL hydrogen peroxide solution with a strength of 34 g per litre? 

1) 25.5g
2) 3.0g?
3) 3.2g
4) 4.2g

Assuming complete ionisation, the pH of 0.1M HCl is 1. The molarity of H₂SO₄ with the same pH is:

1) 0.1
2) 0.05
3) 0.2
4) 2.0

Which is wrongly matched ?

1) Duralumin-Al+Cu+Mg+Mn
2) Alnico-Fe+Al+Ni+Co
3) German silver-Cu+Zn+Ni
4) Monel metal-Cu+Zn+Sn

Which of the following compounds will not undergo Friedel -Craft's reaction easily?

1) Cumene
2) Xylene
3) Nitrobenzene
4) Toluene