SMART INSTITUTE NMDCAT CHEMISTRY-2 TS

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NMDCAT Chemistry-2 Quiz

Welcome to the NMDCAT Chemistry-2 Quiz! This engaging quiz is designed to test your understanding of chemistry concepts relevant to the NMDCAT examination. The quiz features multiple-choice questions covering various topics, ensuring a comprehensive review of essential concepts.

Assess your knowledge and readiness with questions that include:

Electron affinity trends
Hybridization and molecular geometry
Thermodynamics and enthalpy
Electrochemistry and redox reactions

35 Questions9 MinutesCreated by LearningAtom247

1-Which of the following blocks will have comparatively higher electron affinity

S-block

P-block

D-block

F-block

2-The structure of water is

Trigonal

Angular

Linear

Tetrahedral

3-In BF3 molecule, the B atom makes use of

2s orbital

Sp2-hybrid orbitals

2p orbitals

3s orbital

4-According to VSEPR theory O2 and Benzene belongs to..........

AB3 and AB2 respectively

AB2 only

AB2 and AB4 respectively

AB3 only

5-The concept of hybridization was given to remove which of the following drawbacks of V.B.T

It doesn't explain paramagnetism of O2

It doesn't explain odd electron system

It could not explain tatravalency of carbon

All of above

6-The nature of intermolecular forces in CHCl3

Dipole-dipole forces

Dipole-induced dipole forces

London dispersion forces

Hydrogen bonding

7-Calculated diploe moment is always greater than observed due to error in

Charge

Distance

Vector quantity

Both charge and distance

8-What is not correct about (del Hf )

Its value gives an idea about the relative stability of reactants and products

It is always negative

Value depends upon nature of bonds

Its value can be greater or less than zero

9-The enthalpies of all elements in their standard states are

Unity

Always +ve

Always -ve

Zero

10-Hoew much heat is absorbed by 100 g of water when its temperature decreases from 25 to 5 degree celsius? (heat capacity is 4.2 J/gK )

84000 J

2000/4.2 J

-2000/4.2 J

-8400 J

11-By convention, the standard heat of formation of all elements is assumed to be

Zero

Positive

negative

Infinity

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

-1.5 KJ mol^-

-2.7 KJ mol^-

+1.2 KJ mol^-

+1.9 KJ mol^-

13-All are slow processes except

Fermentation of sugar

Weathering of rocks

Reaction of AgNO3 and NaCl

Rusting of iron

14-Standard heat of formation of Al2O3 cannot be determined by glass calorimeter

It reacts with carbon dioxide

Protective layer of Al2O3

It does not catch fire

Al and O2 don't react

15-Magnesium metal is extracted by the electrolysis of its

Concentrated aqueous solution of its chloride

Dilute aqueous solution of its chloride

Its fused chloride

Any solution

16-Standard hydrogen electrode has an arbitrary fixed potential of

0 V

0.1 V

1.0 V

0.001 V

17-The oxidation potential of Mg and Al are +2.37 V and 1.66 V, respectively. The Mg in chemical reaction:

Will be replaced by Al

Would not be able to replace Al

Will replace Al

None of these

18-Which can replace hydrogen from dilute acids?

None of these

19- 8H^+ + MnO4^_ ....................> Mn^2+ + 4 H2O , which one is correct about given equation

5e- in R.H.S

3e- in R.H.S

5e- in L.H.S

3e- in L.H.S

20- Al/Al^+3 II Zn^+2 / Zn galvanic cell, the negative terminal

KCl

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

22-The solubility of Fe(OH)3 is 'X' meloe per dm^3 . Its Ksp would be

9X^3

27X^4

3X^4

9X^4

23-An excess of silver nitrate is added to the aqueous barium chloride and the precipitate is removed by filtration. What are the main ions in the filtrate

Ag+ and NO3- ONLY

Ag+ and NO3- and Ba^+2 only

NO3- and Ba6+2 ONLY

Cl- and NO3- AND Ba^+2 only

24-Buffer solutions can be explained by except

Common ion effect

Le-Chatelier's principle

Law of mass action

Solubility product

25-The conjugate base of H2PO4^-1 is

H3PO4

HPO4^-2

PO4^-3

HPO4^-1

26-Ionization of KClO3 is suppressed by

Increasing temperature

Adding KCl

Adding NaNO3

Decreasing temperature

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

28-Which of the following depends upon temperature

Kw+Kc

Ka+Kb

Ksp

All of these

29-Slope of the graph between 1/T and log K gives

Reaction rate

Activation energy

Specific rate constant

Both (specific rate constant and activation)

30-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

31-If 75% of any given amount of radioactive element disintegrates in60 min. The half life of radioactive element is

20 min

30 min

45 min

25 min

32-Among the following factors, the specific reaction rate of a first order reaction depends on

Temperature

Pressure

Concentration of reactants

Volume

33-For a chemical reaction, which can never be a fractional number

Order

Molecularity

Half-life

Rate constant

34-The increase in reaction rate as a result of increase in temperature from 10K to 100K is

512

400

614

112

35-What will be order of reaction if doubling the concentration of reaction increases the rate by factor 4 and trebling the concentration of reaction by a factor of 9

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SMART INSTITUTE NMDCAT CHEMISTRY-2 TS

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