Chemistry MCQ Quiz Hub

1. All the following variables are used to describle gases except
pressure
volume
moles
density

2. In the van der Waals equation (P + n2a / v2) (v - nb) = nRT which of the following statement is not true?
n2a/v correct for the intermolecular forces.
nb correct for the volume occupied by gas molecules.
at high densities the equation reduces to the ideal gas law
all of the above statements are correct.

3. Methyl alcohol is not used as
a solvent
an anti freezing agent
a substitute for petrol
for denaturing of ethyl alcohol

4. The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent.
alkaline aquenous iodine
aqueous bromine
Fehling solution
aqueous NaOH

5. Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse?
20cm3/min
40cm3/min
160cm3/min
2.5cm3/min

6. When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show?
phenol is unsaturated
2-bromophenol is insoluble in water
a hydroxy group makes the benzene ring more susceptible to electrophilic attack
acid-base reaction

7. As a substance moves from a solid to a liquid all of the following changes occur except:
molecules become more disordered.
K.E of the molecules decreases
intermolecular forces become weaker.
molecules move more frequently.

8. If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at
0?C
273.16K
?273.16 K
?273.16?C

9. The rectified spirit is
12% alcohol
90% alcohol
95% alcohol
100% alcohol

10. Benzene is a good solvent for
fats
resins
iodine
all the above

11. Which of the following solids show anisotropy
Plastic
Glass
Rubber
None of the above

12. Which of the following element doesnot show allotropy
Carbon
Arsenic
Nitrogen
Sulphur

13. Butyl chloride gives possible isomers.
2
3
4
5

14. Purines and pyrimidines are
Enzymes
Nitrogenous bases
Carbohydrates
Lipids

15. Metallic crystals are soluble in
Polar solvent
Non polar solvent
Fused metal
None

16. All the transition elements show
Similar physical properties
Similar chemical properties
Both a and b
None

17. Paramagnetic behaviour of substance is measured by a balance called
Analytical balance
Guoys balance
Electrical balance
Single beam balance

18. In solids the temperature is the measure of
Average kinetic energy of molecules
Vibrational kinetic energy
Translational kinetic energy
None of the above

19. Which of the following properties prove that cathode rays are material in nature
they cast shadow
they possess momentum
they are negatively charged
all of the above

20. Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal?
aluminium can be recycled
aluminium has very low density
aluminium is the most abundant metal in the earth crust
aluminium is resistant to corrosion by organic acids.

21. When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is
0.33 nm
0.34 nm
0.35 nm
0.36 nm

22. On heating aldehydes with Fehlings solution we get a precipitate whose colour is
pink
black
yellow
brick red

23. When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained.
1
2
3
4

24. Which of the following rays has greater frequency.
? -rays
? -rays
? -rays
X -rays

25. Which statement is consistent with Hunds rule.
Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin.
The electrons in the same atom cannot have the same four quantum numbers
There is maximum of two electrons is an orbital.
None

26. What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3
6
4
3
2

27. Atomic number of Mn is 25 what is the electronic configuration in the ground state
1s2 2s2 2p6 3s2 3p6 3d7
1s2 2s2 2p6 3s2 3p6 4s2 4p5
1s2 2s2 2p6 3s2 3p5 3d10
1s2 2s2 2p6 3s2 3p6 4s23d5

28. Which of the following statement is correct
size of Cl atoms > Cl- ion
size of Na+ ion < Na atom
size of Na atom < Na+ ion
Cl- < Na+

29. Which of the following is mineral fibre.
teflon
asbestos
saran
acrylic

30. Which catalyst is used in contact process?
Fe2O3
V2O5
SO3
Ag2O

31. The hardest of the following solids is
sodium
diamond
graphite
magnesium

32. Which of the following elements has greater 1st ionization energy
B
C
N
O

33. Which of the solid does not contain covalent bond
copper
ice
diamond
graphite

34. Which of the following molecule is polar
CCI4
CO2
BF3
none of the above

35. The balanced chemical equation for the reaction which occurs when Be is added to water is
Be+2H2O?Be (OH)2+H2
Be+H2O?Be (OH)2+H2
Be+H2O?[Be (OH)4]+2+H2
no reaction

36. The number of bonds in nitrogen molecule is
one ? one ? bond
two ? one ? bond
one ? and two ? bond
three ? bonds only

37. Which of the following theories is superior to others
VSEPR
VBT
MOT
none of the above

38. Which of the following relation is not possible
?H = ?H1 + ?H2 = ?H3
?E = E1 + E2 = E3
q = q1 + q2 = q3
??H (cycle) = 0

39. Which of the following is not characteristics of reversible reaction
whole amount of reactant does not change into product
chemical equilibrium is established
a catalyst changes the direction of reaction
rate of forward reaction decreases as reaction proceeds

40. Which of the following points are important in connection with equilibrium constant.
Kc is constant at given temperature
Kc is unaffected by change in concentration of reactants or products
Kc indicates the extent of reaction but not about the rate of reaction.
All of the above

41. A solution has pH = 0 its H+ ion concentration is
1 x 10-1
1 x 10-14
1 x 10-7
1

42. Solubility of CaF2 is 2.0x10-4 gdm-3 then Ksp of CaF2 is
4.0 x 10-8
3.2 x 10-11
2.0 x 10-8
4.0 x 10-12

43. 1 mole of electron has mass in microgram
1.008 x 10-3
5.5 x 10-4
1.84 x 10-4
1.673 x 10-3

44. The unit of molality is
moles dm-3
moles kg-1
gram dm-3
none

45. The use of antifreeze in the automobile radiator is an important application of
constitutive property
additive property
colligative property
intrinsic property

46. A solution can be both
dilute and concentrated
dilute and saturated
saturated and unsaturated
saturated and super saturated

47. At which electrode the reduction of the solution is occurring in Al-Ag cell
A?
Ag
Both
Neither

48. Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is
6
8
10
4

49. In which of the following type of reactions energy of reactant is greater than energy of product
endothermic
exothermic
unpredictable
same