SMART INSTITUTE NMDCAT CHEMISTRY 1ST HALF

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SMARTest Chemistry Challenge

Test your knowledge and expertise in Chemistry with our engaging quiz designed specifically for NMDCAT preparation. Dive into questions covering various essential topics in chemistry to ensure you're well-equipped for your upcoming exams.

Multiple choice format for ease of answering
Covers key concepts and principles in chemistry
Ideal for students preparing for NMDCAT

40 Questions10 MinutesCreated by AnalyzingAtom47

1-Number of electrons in half mole of Na+

5.5 Avogadros

5 Avogadros

2-An element has two isotopes A-63 and A-64 with average atomic mass 63.5 amu. Relative abundance of lighter isotopes

50 %

25 %

40 %

75 %

3-The strength of hydrogen bonding is

20 times less than a covalent bond

20 times more than a covalent bond

20 times les than an ionic bond

20 times more than an ionic bond

4-Lower alcohols are soluble in water because

Intermolecular hydrogen bonding

Dipole induced dipoles

Low electro-negativity difference between C and H

All of above

5-Under high pressure which of the following gas show more ideality in character

NH3

CO2

SO2

6-The S.I units of 'a' (coefficient of attraction) is

Nm4mol-2

Atm mol-1

J mol-1

Atm dm6 mol-2

7-Hydrogen is maximum in

Diethyl ether

Benzene

Ethanol

Water

8- C-C bond lengths in diamond crystal are

1.54 pm

154 pm

109.5 pm

1540 pm

9-Identify the correct order of decreasing energy

3s > 2s >1s

2s > 3s >1s

1s > 2s>3s

1s > 3s > 2s

10-Which one of the following ion has similar electronic configuration like Ar

Sc+2

Cr+2

Ti+4

Mn+6

11-Exceptionally high ionization energies of some groups is due to ....... factor

Atomic radius

Shielding effect

Nuclear charge

Nature of orbital

12-The no. of radial nodes in 3P

13-The shape Hydronium ion

Tetrahedral

Angular

Pyramidal

Trigonal planar

14-Polar molecular solid among following

Solidified Xe

Glucose

Solid CO2

15-Maximum dipole moment is processed by

CH3F

CH3Cl3

CH3I

CH3Br

16-Total heat content of a system

Internal energy

Enthalpy

Entropy

All of these

17-According to Hess's law , the enthalpy change for a reaction

Depends upon path

Independent of path

The sum of enthalpy and internal change

None of these

18-Which of the following processes have always del H=-ve

Formation of compound

Dissolution of ionic compound

Combustion

Dilution of a solution

19-Heat of combustion of graphite at 25 celsius is -393.51 KJ/mol and that of diamond is -395.41 KJ/mol. What is the enthalpy for the conversion of diamond into graphite at same temperature.

-1.9 KJ/mol

-2.7 KJ/mol

+1.2 KJ/mol

+1.9 KJ/mol

20-Which of the following statement is true about galvanic cell.

Anode is positively charged

Cathode is negatively charged

Reduction occurs at anode

Reduction occurs at cathode

21-If astrip of Cu-metal is placed in a solution of FeSO4 then

Cu will be deposited

Cu and Fe both dissolve

Fe is precipitated

No reaction occurs

22-If a salt bridge is removed from two half cells

Reaction will stop

Emf drops to zero

Emf is decreased

Electrodes will be reversed

23-The reduction potential of Cu = +0.34 V and Zn = -0.76 V. When these are coupled the emf of cell is

-0.42 V

+0.42 V

-1.10 V

+1.10 V

24-Cell potential depends upon

Temperature

Nature of electrolyte

Concentration of ions

All of these

25-Li has least reduction potential in electrochemical series. Which element has highest reduction potential

26- Standard hydrogen electrode has an arbitrary fixed potential of

0 V

0.1 V

1.0 V

O.OO1 V

27-Which of the following metal will liberate hydrogen gas when react with steam

28-pH of an aqueous solution is 3.0 at 25 celsius. The hydrogen ion concentration in the solution would be

0.001

0.01

0.0001

10^-5

29-At equilibrium, the concentration of reactants and products are

Constant

Maximum

Different

Equal

30-In Haber's process, equilibrium mixture contains ....... NH3 by volume.

20 %

55 %

70 %

35 %

31-The value of Kc for H2O at 25 celsius

1 x 106-14 mol/dm3

14 mol/dm3

1.86 x 10^-16 mol/dm-3

1.0 x 10^-7 mol/dm3

32-The pH of 1M MOH solution which is only 10 % dissociated

33-Which is correct statement

PKa x pKb =14

PKa + pKb = Kw

Ka x Kb =pKw

Ka x Kb =Kw

34-The unit of rate constant is the same as that of the rate of reaction in

1st order reaction

Zero order reaction

2nd order reaction

3rd order reaction

35-The specific rate constant of a chemical reaction is the rate of the reaction when the concentration of the reactant is

Less than unity

Greater than unity

Equal to unity

Equal to the concentration of 2nd order reaction

36-The rate of reaction is doubled for every 10 celsius rise in temperature The increase in reaction rate as a result of temperature rise from10 to 100 degree celsius

112

400

512

614

37-The rate of reaction depends upon

Molar concentration

Equivalent mass

Atomic mass

None of these

38-For a first order reaction , the half -life period is independent of

Initial concentration

First power of final concentration

Cube root of initial concentration

Square of final concentration

39-In a reaction, concentration of reactant A is increased by 16 times, the rate increased only two times, the order of reaction would be

1/2

1/4

40-If initial concentration is doubled, the time for half reaction is also doubled. The order of reaction is

First

Second

Third

Zero

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