## 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