DAILY UPDATES MOCK TEST 63

1.

The main use of salt in the diet is to

Make the taste of food better

Produce in small amounts the hydrochloric acid required for the digestion of food

Ease the process of cooking

Increase the solubility of food particles in water

2. The most malleable metal is

Platinum

Silver

Iron

Gold

3. The mass number of a nucleus is

Always less than its atomic number

The sum of the number of protons and neutrons present in the nucleus

Always more than the atomic weight

A fraction

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

Hydrogen

Oxygen

Nitrogen

Carbon dioxide

5. The first metal used by man was

Iron

Copper

Gold

Bronze

6. The iron ore magnetite consists of

Fe2O3

Fe3OH4

FeCO3

3Fe2O3 .. 3H2O

7. The major constituent of air is

Nitrogen

Carbon dioxide

Oxygen

Hydrogen

8. The main active constituent of tea and coffee is

Nicotine

Chlorophyll

Caffeine

Aspirin

9.

The hardest form of carbon is

Coke

Graphite

Diamond

Charcoal

10. The monomer of polythene is

Vinyl chloride

Ethylene

Ethyl alcohol

None of the above

11. The graphite rods in the nuclear reactor

React with U to release energy

Produce neutrons

Undergo combustion which triggers the nuclear fission

Convert fast moving neutrons into thermal neutrons

12. The hydronium ion is

H+

HO -

H2+

H3O+

13. The most important ore of aluminium is

Bauxite

Magnetite

Haematite

Monazite

14. The inherited traits of an organism are controlled by

RNA molecules

Nucleotides

DNA molecules

Enzymes

15. The luster of a metal is due to

Its high density

Its high polishing

Its chemical inertness

Presence of free electrons

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

Ethylene

Ethane

Carbon dioxide

Acetylene

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

Carbon

Hydrogen

Oxygen

Nitrogen

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

Monazite

Fluorspar

Bauxite

Magnetite

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

Contrabands

Lead in bullets

Narcotics

Genuine coins from counterfeit coins

20. The ionic radii of N^3-, O^2-, F^- and Na⁺ follows the order

N3- > O2- > F- > Na+

N3- > Na+ > O2- > F-

Na+ > O2- > N3- > F-

O2- > F- > Na+ > N3-

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

HI

HF

HCI

HBr

22. The high reactivity of fluorine is due to

Its high electro negativity

Small size of fluorine atom

Availability of d-orbitals

Strong F - F bond

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

Orissa coast

Travancore coast

West Bengal coast

Gujarat coast

24. The number of electrons presents in H⁺ is

Zero

One

Two

Three

25. 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?

1/6

1/3

1/8

1/4

26. The most abundant rare gas in the atmosphere is

He

Ne

Ar

Xe

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

Thermoplastic

Thermoset

Chemical compound

Polymer

28.

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

3 billion years

100 years

0.01 minute

13 days

29. The most electropositive elements among the following is

Na

Ca

K

Cs

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

Adding sodium carbonate

Distillation

Adding caustic soda

Boiling

31. The main chemical constituent of clay is

Silicon oxide

Aluminium borosilicate

Zeolites

Aluminium silicate

32.

The mineral containing both magnesium and calcium is

Magnesite

Calcite

Carnallite

Dolomite

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

4

5

2

0

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

30 KJ

1 KJ

39 KJ

29 KJ

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

1.568 x 103

6.023 x 1019

4.84 x 1017

6.023 x 1023

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

Zn

Fe

Ag

Ca

37.

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

5

4

2

3

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

An addition reaction

A condensation reaction

An oxidation reaction

An elimination reaction

39.

The isomerism which exists between CH₃CHCI₂ and CH₂CI. CH₂CI is

Chain isomerism

Functional group isomerism

Positional isomerism

Metamerism

40. Zone refining is used for the purification of

Au

Ge

Ag

Cu

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

Cineole

Engenol

Geraniol

Limonene

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

Was used initially for making bottles of soda(carbonated drink)

Is made using soda(sodium carbonate)

Was initially used for storing sodium carbonate

Is made using soda lime

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

0.5 mole

0.2 mole

0.4 mole

0.25 mole

44. The oil used in the froth floatation process is

Coconut oil

Olive oil

Kerosene oil

Pine oil

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

This acid, in ancient times, was used to eliminate ant-hills

This corrosive acid is secreted by ants to drive away their enemies

This acid was first obtained by the distillation of ants

Ants are attracted by the odour of this acid

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

Luminous zone

Dark zone

Blue zone

Non-luminous zone

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

1.00 gram

4.00 gram

8.00 gram

4 x 6.02 x 1023 gram

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

5x/36

5x

7.2 x

X/6

49.

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

N2

N

N-2

N3

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

1 gram of molecule

0.5 gram of molecule

5 gram of molecule

10 gram of molecule

Daily Updates Mock Test 63

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

2.

What first name or nickname would you like us to use?

2. The most malleable metal is

3. The mass number of a nucleus is

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

5. The first metal used by man was

6. The iron ore magnetite consists of

7. The major constituent of air is

8. The main active constituent of tea and coffee is

9. The hardest form of carbon is

10. The monomer of polythene is

11. The graphite rods in the nuclear reactor

12. The hydronium ion is

13. The most important ore of aluminium is

14. The inherited traits of an organism are controlled by

15. The luster of a metal is due to

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

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

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

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

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

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

22. The high reactivity of fluorine is due to

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

24. The number of electrons presents in H+ is

25. 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?

26. The most abundant rare gas in the atmosphere is

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

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

29. The most electropositive elements among the following is

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

31. The main chemical constituent of clay is

32. The mineral containing both magnesium and calcium is

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

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

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

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

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

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

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

40. Zone refining is used for the purification of

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

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

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

44. The oil used in the froth floatation process is

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

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

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

48. 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

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

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

1.

The main use of salt in the diet is to

9.

The hardest form of carbon is

20. The ionic radii of N^3-, O^2-, F^- and Na⁺ follows the order

24. The number of electrons presents in H⁺ is

28.

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

32.

The mineral containing both magnesium and calcium is

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

37.

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

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

39.

The isomerism which exists between CH₃CHCI₂ and CH₂CI. CH₂CI is

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

49.

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

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