#### Hydrogen one mark questions

11th Standard

Reg.No. :
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Chemistry

Time : 00:40:00 Hrs
Total Marks : 50

Part - A

50 x 1 = 50
1. The most abundant element in the universe is _________.

(a)

aluminium

(b)

mica

(c)

dihydrogen

(d)

nitrogen

2. The number of neutrons in  hydrogen atom is ___________.

(a)

three

(b)

two

(c)

one

(d)

zero

3. _____________ is known as heavy hydrogen.

(a)

protium

(b)

deuterium

(c)

tritium

(d)

both a and b

4. Deuterium consist of _____________

(a)

one electron, two proton, three neutron

(b)

one electron, one proton, one neutron

(c)

two electron, one proton, one neutron

(d)

three electron, two proton, one neutron

5. The radioactive isotope of hydrogen is __________

(a)

protium

(b)

deuterium

(c)

tritium

(d)

nascent hydrogen

(a)

1T3

(b)

1D2

(c)

10Ne21

(d)

2He3

7. The half life period of Tritium is ___________

(a)

12.33 secs

(b)

12.33 mins

(c)

12.33 hrs

(d)

12.33 years

8. Ammonia is manufactured by __________ process.

(a)

Contact

(b)

Bergius

(c)

Haber's

(d)

none of the above

9. ___________ torches is/are used in cutting and welding of a steel.

(a)

Oxy acetylene

(b)

Oxy hydrogen

(c)

both a and b

(d)

neither a nor b

10. Hydrogen is used in _________

(a)

hydrogenation of oils

(b)

fuel cells

(c)

gas bags for air ships

(d)

all the above

11. Match the list I with list II and select the correct answer using the code given below

 List I List II A Protium 1 Radio active B Tritum 2 Aligned nuclear spins C Ortho hydrogen 3 Opposed nuclear spins D Para hydrogen 4 No neutron
(a)
 A B C D 1 3 2 4
(b)
 A B C D 4 1 2 3
(c)
 A B C D 3 1 4 2
(d)
 A B C D 2 1 4 3
12. Which among the following statement/s given below is/ are incorrect regarding hydrogen?
1. It is diatomic in nature
2. Has only one electron in the outermost shell
3. Very good oxidizing agent
4. Does not form hydrides easily

(a)

1,2 & 3

(b)

only 4

(c)

only 3

(d)

only 2

13. The conversion of atomic hydrogen to dihydrogen is a __________ change.

(a)

endothermic

(b)

exothermic

(c)

photochemical

(d)

nuclear

14. ${ CO }_{ (g) }+{ { H }_{ 2 }O }_{ (g) }\quad \overset { 400C }{ \underset { X }{ \longrightarrow } } { CO }_{ 2(g) }+{ H }_{ 2(g) }\quad$'X' is

(a)

Nickel

(b)

Iron

(c)

Iron oxide

(d)

15. Hydrogen bomb is based on the principle of ____________

(a)

fission

(b)

fusion

(c)

both a and b

(d)

neither a nor b

16. Hydrogen can be obtained from water by reaction with

(a)

metal oxides

(b)

non metal oxides

(c)

metals

(d)

metal hydrides

17. Hydrogen burns in air with a - flame.

(a)

light blusish

(b)

yellow

(c)

green

(d)

none of these

18. Which pair are not hydrogen isotopes?

(a)

Ortho and para hydrogen

(b)

Protium and deuterium

(c)

Deuterium and tritium

(d)

Tritium and protium

19. Ortho and para hydrogen differ in

(a)

proton spin

(b)

electron spin

(c)

nuclear charge

(d)

both b and c

20. ___________ is considered as the potential alternative fuel of the future.

(a)

hydrogen

(b)

gasoline

(c)

biodiesel

(d)

propane

21. The ionisation energy of hydrogen is higher than alkali metals. Pick out the correct reason for the above statement.

(a)

Because of smaller size of H.

(b)

Presence of 1e- in outermost shell

(c)

Presence of one proton in its nucleus

(d)

Absence of neutrons.

22. Hydrogen accepts an electron to attain the inert gas configuration. In this way it resembles __________

(a)

chalcogens

(b)

halogens

(c)

transition metals

(d)

alkali metals

23. Hydrogen acts as a reducing agent and thus resembles

(a)

halogens

(b)

chalogens

(c)

inert gases

(d)

alkali metals

24. Which among of the following reaction produces hydrogen?

(a)

Na2O2 + HCI

(b)

BaO2 + HCI

(c)

K2S2O8 + H2O

(d)

Zn + HCI

25. In which of the following compounds does hydrogen has an oxidation state of -1?

(a)

CH4

(b)

NH3

(c)

HCl

(d)

CaH2

26. Which properties of hydrogen are responsible for moderation of the climate and body temperature of living beings?

(a)

High heat of vapour isation

(b)

High heat capacity

(c)

Both (a) and (b)

(d)

None of these

27. Consider the following statements
1. Water has high dielectric constant.
2. Water has strong intra molecular hydrogen bonding
3. Water is an Universal solvent
Which of the following statement(s) given above is are not correct

(a)

1 & 3

(b)

only 1

(c)

2 & 3

(d)

only 2

28. Consider the following statements
1. Hard water forms scum with soap.
2. Hard water lathers easily with soap
3. Hard water is unsuitable for laundry and boilers
Which of the following statement(s) given above is  are correct?

(a)

1 & 3

(b)

only 1

(c)

2 & 3

(d)

only 2

29. Match the list I with List II and select the correct answer using. the code given below the lists.

 List I List II A Calcium hydrogen carbonate 1 Permanent hardness B Calcium chloride 2 Chelating C Sodium aluminium  silicate 3 Temporary hardness D EDTA 4 Ion exchange method
(a)
 A B C D 1 3 2 4
(b)
 A B C D 4 3 1 2
(c)
 A B C D 3 1 4 2
(d)
 A B C D 2 1 4 3
30. Which of the following compounds is used for water softening?

(a)

Ca3(PO4)2

(b)

Na3PO4

(c)

NaAlSiO4

(d)

Na2HPO4

31. The structure of water molecule is __________

(a)

bent.

(b)

tetrahedral

(c)

distorted octahedral

(d)

trigonal bi pyramidal

32. Hardness of water is due to ___________ of calcium and magnesium.

(a)

bicarbonates

(b)

sulphates

(c)

chlorides

(d)

all the above

33. FeSO4 contains _________ molecules of water of hydration.

(a)

5

(b)

7

(c)

10

(d)

12

34. ___________ is extensively used as a moderator in nuclear reactors.

(a)

H2O

(b)

H2O2

(c)

D2O

(d)

D2O2

35. Match the list Iwith List IIand select the correct answer using. the code given below the lists.

 List I List II A H2O2 1 SiH4 B D2O 2 PdH C Metallic hydride 3 Bleach D Molecular hydride 4 Study of reaction mechanism
(a)
 A B C D 1 3 2 4
(b)
 A B C D 4 3 1 2
(c)
 A B C D 3 4 2 1
(d)
 A B C D 2 1 4 3
36. The H- O- H angle in water molecule is about

(a)

90°

(b)

104.5°

(c)

109°28'

(d)

180°

37. Hardness of water cannot be removed by

(a)

treating with washing soda

(b)

(c)

boiling

(d)

38. The chemical that is added to water in order to remove temporary hardness is ____________

(a)

Ca(OH)2

(b)

CaCO3

(c)

HCl

(d)

CaSO4

39. Name the anions responsible for permanent hardness of water

(a)

sulphate

(b)

chloride

(c)

nitrate

(d)

both (a) and (b)

40. Presence of which cation makes the water hard in nature?

(a)

Ca& Mg

(b)

Na&Mg

(c)

Ca&Na

(d)

Mg&F

41. Heavy water is __________

(a)

De-mineralized water

(b)

De-ionized water

(c)

ordinary water containing dissolved salts of heavy metals.

(d)

The compound of heavier isotope of hydrogen with oxygen.

42. The velocity of neutrons in nuclear reactor is slowed down by

(a)

H2O

(b)

D2O

(c)

Zinc rods

(d)

Copper rods

43. The maximum density of water is observed at ___________

(a)

0oC

(b)

4oC

(c)

11.6oC

(d)

273oC

44. Hydrogen peroxide was discovered by _______

(a)

(b)

J.J Thomson

(c)

Urey

(d)

J.L. Thenard

45. Metal hydrides are ionic, covalent or molecular in nature. Among LiH, NaH, KH, RbH, CsH, the  correct order of increasing ionic character is

(a)

LiH > NaH > CsH > KH>RbH

(b)

LiH <NaH < KH < RbH < CsH

(c)

RbH > CsH > NaH > KH > LiH

(d)

NaH> CsH > RbH > LiH > KH

46. H2O2 acts a ______ agent.

(a)

oxidizing

(b)

reducing

(c)

both reducing and oxidizing

(d)

neither reducing nor oxidizing

47. H2O2 is a ________ acid.

(a)

mono basic

(b)

di basic

(c)

tri basic

(d)

none

48. LiH is an example of _________ hydride.

(a)

ionic

(b)

saline

(c)

covalent

(d)

both a and b

49. A example of covalent hydride is ____________

(a)

CaH2

(b)

CH4

(c)

TiH

(d)

all the above

50. ___________ is an example of intra molecular hydrogen bonding.

(a)

salicylaldehyde

(b)

hydrogen fluoride

(c)

para nitro phenol

(d)

both a and c