General Knowledge Quiz: 05/05/13

Friday, May 10, 2013

The formula C6H5-CO-CH3 represents

74. The formula C6H5-CO-CH3 represents

A. Acetone

B. Acetic acid

C. Acetophenone

D. Phenyl acetate

Answer: Option C

75.The metal that is usually extracted from sea water is

A. Ca B. Na

C. K D. Mg

Answer: Option D

76.The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

A. liquation B. leaching

C. levigation D. magnetic separation

Answer: Option C

77. The inert gases are ____ in water

A. sparingly soluble

B. insoluble

C. soluble

D. None of these

Answer: Option A

78. The molecular formula of phosphorous is

A. P1 B. P2

C. P3 D. P4

Answer: Option D

79.The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

A. atomic structure

B. metallurgy

C. periodic table of contents

D. discovery of elements

Answer: Option C

The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in

69. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in

A. 1.8 gram of H2O

B. 12 moles of KMnO4

C. 0.6N H2SO4

D. 4.6 gram of C2H5OH

Answer: Option B

70.The National Chemical Laboratory is situated in

A. New Delhi

B. Bangalore

C. Pune

D. Patna

Answer: Option C

71. Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be

A. 2 : 16 : 2

B. 2 : 16 : 1

C. 1 : 16 : 2

D. 1 : 1 : 1

Answer: Option C

72. The mass number of an atom is equal to

A. the number of protons

B. the number of protons and electrons

C. the number of nucleons

D. the number of neutrons

Answer: Option C

73. The maximum number of covalent formed by nitrogen is

A. 1 B. 2

C. 3 D. 4

Answer: Option D

The most important ore of aluminium is

61.The most important ore of aluminium is

A. bauxite B. magnetite

C. haematite D. monazite

Answer: Option A

62. The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of

A. an addition reaction

B. a condensation reaction

C. an oxidation reaction

D. an elimination reaction

Answer: Option B

63.The number of electrons presents in H+ is

A. zero B. one

C. two D. three

Answer: Option A

64. The hottest part of the gas flame is known as

A. luminous zone

B. dark zone

C. blue zone

D. non-luminous zone

Answer: Option D

65. The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

A. carbon B. hydrogen

C. oxygen D. nitrogen

Answer: Option C

66. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is

A. chain isomerism

B. functional group isomerism

C. positional isomerism

D. metamerism

Answer: Option C

67. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

A. 1/6 B. 1/3

C. 1/8 D. 1/4

Answer: Option C

68. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

A. 4 B. 5

C. 2 D. zero

Answer: Option A

The main chemical constituent of clay is

53. The main chemical constituent of clay is

A. silicon oxide

B. aluminium borosilicate

C. zeolites

D. aluminium silicate

54. The mineral containing both magnesium and calcium is

A. magnesite B. calcite

C. carnallite D. dolomite

Answer: Option D

55. The metal does not give H2 on treatment with dilute HCL is

A. Zn B. Fe

C. Ag D. Ca

Answer: Option C

56.The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

A. 1 gram of molecule

B. 0.5 gram of molecule

C. 5 gram of molecule

D. 10 gram of molecule

Answer: Option C

57. The most extensive, commercially useful source of thorium as monazite sand occurs in India at

A. Orissa coast

B. Travancore coast

C. West Bengal coast

D. Gujarat coast

Answer: Option B

58.The main active constituent of tea and coffee is

A. nicotine B. chlorophyll

C. caffeine D. aspirin

Answer: Option C

59. The maximum number of isomers for an alkene with molecular formula C4H8 is

A. 5 B. 4

C. 2 D. 3

Answer: Option B

60.The hardest form of carbon is

A. coke B. graphite

C. diamond D. charcoal

Answer: Option C

The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

44.The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

A. 3 billion years

B. 100 years

C. 0.01 minute

D. 13 days

Answer: Option C

45. The gas used for artificial ripening of green fruit is

A. ethylene

B. ethane

C. carbon dioxide

D. acetylene

Answer: Option A

46.Zone refining is used for the purification of

A. Au B. Ge

C. Ag D. Cu

Answer: Option B

47. The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

A. cineole B. engenol

C. geraniol D. imonene

Answer: Option A

48. The molecule which has the highest percentage of ionic character among the following is

A. HI B. HF

C. HCI D. HBr

Answer: Option B

49. The high reactivity of fluorine is due to

A. its high electro negativity

B. small size of fluorine atom

C. availability of d-orbitals

D. strong F - F bond

Answer: Option A

50. The iron ore magnetite consists of

A. Fe2O3 B. Fe3OH4

C. FeCO3 D. 3Fe2O3 .. 3H2O

Answer: Option A

51. The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

A. 5x/36

B. 5x

C. 7.2 x

D. x/6

Answer: Option A

52. The major constituent of air is

A. nitrogen

B. carbon dioxide

C. oxygen

D. hydrogen

Answer: Option A

The inexpensive and commonly used variety of glass is called soda glass. It is called so because

36. The inexpensive and commonly used variety of glass is called soda glass. It is called so because

A. was used initially for making bottles of soda(carbonated drink)

B. is made using soda(sodium carbonate)

C. was initially used for storing sodium carbonate

D. is made using soda lime

Answer: Option B

37. The gas used in the manufacture of vanaspati from vegetable oil is

A. hydrogen B. oxygen

C. nitrogen D. carbon dioxide

Answer: Option A

38. The ionic radii of N3-, O2-, F- and Na+ follows the order

A. N3- > O2- > F- > Na+

B. N3- > Na+ > O2- > F-

C. Na+ > O2- > N3- > F-

D. O2- > F- > Na+ > N3-

Answer: Option A

39. The graphite rods in the nuclear reactor

A. react with U to release energy

B. produce neutrons

C. undergo combustion which triggers the nuclear fission

D. convert fast moving neutrons into thermal neutrons

Answer: Option D

40.The first metal used by man was

A. iron B. copper

C. gold D. bronze

Answer: Option B

41.The hydronium ion is

A. H+

B. HO -

C. H2+

D. H3O+

Answer: Option D

42. The most electropositive elements among the following is

A. Na B. Ca

C K D. Cs

Answer: Option D

43. The method that cannot be used for removing permanent hardness of water is

A. adding sodium carbonate

B. distillation

C. adding caustic soda

D. boiling

Answer: Option D

The mass of one Avogadro number of helium atom is

29. The most malleable metal is

A. platinum B. silver

C. iron D. gold

30. The oil used in the froth floatation process is

A. coconut oil

B. olive oil

C. kerosene oil

D. pine oil

Answer: Option D

31. The number of waves in n x 10th Bohr's orbit are

A. n2

B. n

C. n-2

D. n3

Answer: Option B

32. The mass of one Avogadro number of helium atom is

A. 1.00 gram

B. 4.00 gram

C. 8.00 gram

D. 4 x 6.02 x 1023 gram

Answer: Option B

33. The items amenable to detection by soft x-rays are

A. contrabands

B. lead in bullets

C. narcotics

D. genuine coins from counterfeit coins

Answer: Option D

34. The material which can be deformed permanently by heat and pressure is called a

A. thermoplastic

B. thermoset

C. chemical compound

D. polymer

Answer: Option B

35.The mass number of a nucleus is

A. always less than its atomic number

B. sum of the number of protons and neutrons present in the nucleus

C. always more than the atomic weight

D. a fraction

Answer: Option B

The heat energy produced when the human body metabolises 1 gram of fat is

23. The heat energy produced when the human body metabolises 1 gram of fat is

A. 30 KJ

B. 1 KJ

C. 39 KJ

D. 29 KJ

Answer: Option C

24. What are the number of moles of CO2 which contains 16 g of oxygen?

A. 0.5 mole

B. 0.2 mole

C. 0.4 mole

D. 0.25 mole

Answer: Option A

Explanation:

One mole of CO2 has mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.

25. The main use of salt in the diet is to

A. make the taste of food better

B. produce in small amounts the hydrochloric acid required for the digestion of food

C. ease the process of cooking

D. increase the solubility of food particles in water

Answer: Option B

26. The monomer of polythene is

A. vinyl chloride

B. ethylene

C. ethyl alcohol

D. None of the above

Answer: Option B

27. The luster of a metal is due to

A. its high density

B. its high polishing

C. its chemical inertness

D. presence of free electrons

Answer: Option D

28. The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

A. 1.568 x 103

B. 6.023 x 1019

C. 4.84 x 1017

D. 6.023 x 1023

Answer: Option B

The nuclear particles which are assumed to hold the nucleons together are

None of the above

Answer: Option B

15. The nuclear particles which are assumed to hold the nucleons together are

A. electrons B. positrons

C. neutrons D. mesons

Answer: Option D

16.The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

A. 2.05 gram

B. 3.05 gram

C. 4.05 gram

D. 5.05 gram

Answer: Option B

17. The octane number of zero is assigned to

A. 2-methyl octane

B. n-heptane

C. iso-octane

D. 3-methyl octane

Answer: Option B

18. The metal that is used as a catalyst in the hydrogenation of oils is

A. Ni B. Pb

C. Cu D. Pt

Answer: Option A

19. The most abundant rare gas in the atmosphere is

A. He B. Ne

C. Ar D. Xe

Answer: Option C

20. The Latin word formica means ant. The name formic acid is derived from this Latin word because

A. this acid, in ancient times, was used to eliminate ant-hills

B. this corrosive acid is secreted by ants to drive away their enemies

C. this acid was first obtained by the distillation of ants

D. ants are attracted by the odour of this acid

Answer: Option C

21. The ore which is found in abundance in India is

A. monazite B. fluorspar

C. bauxite D. magnetite

Answer: Option A

22. The inherited traits of an organism are controlled by

A. RNA molecules

B. nucleotides

C. DNA molecules

D. enzymes

Answer: Option C

The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called

8. The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called

A. granite

B. basalt

C. igneous rocks

D. sedimentary rocks

Answer: Option C

9. The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is

A. Dalton's law

B. Gay Lussac's law

C. Henry's law

D. Raoult's law

Answer: Option C

10. The main buffer system of the human blood is

A. H2CO3 - HCO3

B. H2CO3 - CO32-

C. CH3COOH - CH3COO-

D. NH2CONH2 - NH2CONH+

Answer: Option A

11. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

A. helium B. ozone

C. oxygen D. methane

Answer: Option B

12. The most commonly used bleaching agent is

A. alcohol

B. carbon dioxide

C. chlorine

D. sodium chlorine

Answer: Option C

13. The nucleus of a hydrogen atom consists of

A. 1 proton only

B. 1 proton + 2 neutron

C. 1 neutron only

D. 1 electron only

Answer: Option A

14. The heat required to raise the temperature of body by 1 K is called

A. specific heat

B. thermal capacity

C. water equivalent

The nucleus of an atom consists of

1.The nucleus of an atom consists of

A. electrons and neutrons

B. electrons and protons

C. protons and neutrons

D. All of the above

Answer: Option C

2.The number of moles of solute present in 1 kg of a solvent is called its

A. molality B. molarity

C. normality D. formality

Answer: Option A

3.The most electronegative element among the following is

A. sodium B. bromine

C. fluorine D. oxygen

Answer: Option C

4. The metal used to recover copper from a solution of copper sulphate is

A. Na B. Ag

C. Hg D. Fe

Answer: Option D

5. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

A. p-electrons in Ne(Z = 10)

B. s-electrons in Mg(Z = 12)

C. d-electrons in Fe(Z = 26)

D. p-electrons in CI(Z = 17)

Answer: Option D

6. The metallurgical process in which a metal is obtained in a fused state is called

A. smelting B. roasting

C. calcinations D. froth floatation

Answer: Option A

7. The molecules of which gas have highest speed?

A. H2 at -73oC

B. CH4 at 300 K

C. N2 at 1,027oC

D. O2 at 0oC

Answer: Option A