Chemistry Question and Answers

1. The correct option representing a Freundlich adsorption isotherm is

NEET 2019 Surface Chemistry

2. Which one of the following undergoes partial ionization in solution?

COMEDK 2008 Equilibrium

3. The ratio of heats liberated at 298 K from the combustion of one kg of coke and by burning water gas obtained from kg of coke is
(Assume coke to be 100% carbon.)
(Given enthalpies of combustion of $CO_2$, CO and $H_2$ as 393.5 kJ, 285 kJ, 285 kJ respectively all at 298 K.)

KCET 2014 Thermodynamics

4. For a chemical reaction of the type $A \rightleftharpoons B, K = 2.0 $ and $B \rightleftharpoons C, K = 0.01.$ Equilibrium constant for the reaction $2C \rightleftharpoons 2A$ is

Delhi UMET 2011 Equilibrium

5. Which one of the following compounds is resistant to nucleophilic attack by hydroxylions?

AIPMT 1998 Alcohols Phenols and Ethers

6. The charge required for the reduction of 1 mole of $\ce{MnO^{-}_4 } $ to $\ce{MnO_2}$ is

KCET 2018 Electrochemistry

7. In the periodic table metals usually used as catalysts belong to

KCET 2007 Classification of Elements and Periodicity in Properties

8. Chemically considering digestion is basically

AIPMT 1994 Biomolecules

9. CH₃CH $=$ CHCH₃ + CHCl₃ + t-BuOK → A. A is

AIIMS 2008 Hydrocarbons

10. The unstable intermediate dichlorocarbene $\ce{[:CCl_2]}$ is formed during

COMEDK 2014 Alcohols Phenols and Ethers

11. The correct set of four quantum numbers for the outermost electron of sodium (Z = 11) is

KCET 2012 Structure of Atom

12. The number of oxygen atoms in 4.4 g of $CO_2$ is

AIPMT 1990 Organic Chemistry – Some Basic Principles and Techniques

13. For the electrochemical cell, $(M | M^+)||(X^- | X), E^\circ (M^+/ M ) = 0.44\, V $ and $E^\circ (X/X^-)= 0.33 V$ From this data one can deduce that

IIT JEE 2000 Electrochemistry

14. Benzaldehyde condenses with N,N-dimethylaniline in presence of anhydrous ZnC12 to give

BHU 2006 Aldehydes Ketones and Carboxylic Acids

15. On heating which of the following releases $\ce{CO_2}$ most easily ?

AIPMT 2015 The s-Block Elements

16. Benzaldehyde on refluxing with aqueous alcoholic KCN produce

KEAM 2005 Aldehydes Ketones and Carboxylic Acids

17. Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

AIPMT 2005 Haloalkanes and Haloarenes

18. When the same quantity of current is passed through $\ce{Cu5O_4}$ and $\ce{AgNO_3}$ solution 2.7 g of silver is deposited. The amount of copper deposited is

COMEDK 2011 Electrochemistry

19. Solubility of $ MX_2 $ type electrolytes is $ 0.5 \times 10^{-4} mol/L , $ then find out $ K_sp $ of electrolytes.

AIPMT 2002 Equilibrium

20. Energy of an electron is given by $\hspace15mm E=-2.178 \times 10^{-18} \, J$ Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be $ \, \, \, (6.62 \times 10^{-34} \, Js \, and \, \, c=3.0 \times 10^8 \, ms^{-1})$

JEE Main 2013 Structure of Atom

21. The enthalpy of formation of $CO_{\left(g\right),} CO_{2\left(g\right)}, N_{2}O_{\left(g\right)}$ and $N_{2}O_{4\left(g\right)}$ is -110, -393, +811 and 10 kj/mol respectively. For the reaction,
$N_{2}O_{4\left(g\right)}+3CO_{\left(g\right)}\to N_{2}O_{\left(g\right)}+3CO_{2\left(g\right)}.\Delta H_{r} \left(kj/mol\right)$ is

AIIMS 2011 Thermodynamics

22. The plot of concentration of the reactant versus time for a reaction is a straight line with a negative slope. This reaction follows

AIPMT 1996 Chemical Kinetics

23. The spin only magnetic moment of $\ce{Ni^{2+}}$ (in B.M.) in aqueous solution will be

COMEDK 2012 The d-and f-Block Elements

24. Which one of the following has the smallest heat of hydrogenation per mole ?

IIT JEE 1993 Hydrocarbons

25. Which has most stable +2 oxidation state?

IIT JEE 1995 Classification of Elements and Periodicity in Properties

26. Principal quantum number of an atom is related to the

AIIMS 1998 Structure of Atom

27. The IUPAC name of $\ce{ CHH_3 - O - CH_2 CH_2 CH3 }$ is

COMEDK 2010 Organic Chemistry – Some Basic Principles and Techniques

28. $(CH_3)_3 CMgCl$ on reaction with $D_2O$ produces

IIT JEE 1997 Hydrocarbons

29. Iodoform test is not given by

AIPMT 1998 Aldehydes Ketones and Carboxylic Acids

30. The acidic nature of carboxylic acids
$RCOOH\rightarrow RCOO^-+H^+$ is due to

Manipal 2009 Aldehydes Ketones and Carboxylic Acids

Chemistry Questions