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Question Bank No: 1

1. Hydrogen peroxide when added to a solution of potassium permanganate acidified with sulphuric acid

a)		forms water only
b)		acts as an oxidizing agent
c)		acts as a reducing agent
d)		reduces sulphuric acid

2. A certain metal will liberate bydrogen from dilute acids. It will react with water to form hydrogen only when the metal is heated and the water is in the form of steam. The metal is probably

a)		iron
b)		potassium
c)		copper
d)		mercury

3. Water softening by Clarke's process uses

a)		calcium bicarbonate
b)		sodium bicarbonate
c)		calcium hydroxide
d)		sodium aluminate

4. The normality of "10 volume" Hydrogen peroxide is

a)		0.176
b)		3.52
c)		1.78
d)		17.8

5. Hydrogen can show the oxidation state

a)		+1
b)		-1
c)		+1 and -1
d)		0, +1 and -1

6. .............Process represents the manufacture of hydrogen

a)		Bergius
b)		Haber
c)		Cannizaro
d)		Bosch

7. Adsorption of hydrogen by palladium and platinum is known as

a)		occlusion
b)		hydrogenation
c)		reduction
d)		debydragenation

8. With metals like Ti and Zr, hydrogen forms

a)		Ionic hydrides
b)		covalent hydrides
c)		molecular hydrides
d)		interstitial hydrides

9. In calgon process of softening of water, which of the following is used

a)		Sodium polymeta phosphate
b)		Anion exchange resin
c)		hydrated sodium aluminium silicate
d)		${Na}_{2} {CO}_{3}$

10. Water has maximum density at

a)		$0^{o} C$
b)		${- 4}^{o} C$
c)		$4^{o} C$
d)		$100^{o} C$

11. Heavy water is used for

a)		drinking purpose
b)		dry cleaning
c)		preparation of dihydrogen
d)		moderator in nuclear reactors

12. Which isotope of hydrogen is/ are radioactive in nature?

a)		Protium and deuterium
b)		Tritium only
c)		Tritium and deuterium
d)		Only deuterium

13. Ortho and para hydrogen differ essentially in

a)		Physical properties
b)		chemical properties
c)		spin of electron
d)		spins of protons

14. Permanent hardness can be removed by adding

a)		${Cl}_{2}$
b)		${Na}_{2} {CO}_{3}$
c)		CaO ${Cl}_{2}$
d)		K

15. Water Softening by Clark's process uses

a)		Calcium bicaronate
b)		Sodium bicarbonate
c)		Potash alum
d)		Calcium hydroxide

16. What is formed when calcium carbide reacts with heavy water?

a)		$C_{2} D_{2}$
b)		$Ca O_{2}$
c)		${Ca}_{2} D_{2}$ O
d)		${CD}_{2}$

17. In which of the following reactions, $H_{2} O_{2}$ acts as a reducing agent?

a)		${PbO}_{2} (s)$ + $H_{2} O_{2 (aq)} \to$ PbO(s) + $H_{2} O (l) + O_{2} (g)$
b)		${Na}_{2} {SO}_{3 (aa)} + H_{2} O_{2} (aq) \to {Na}_{2} {SO}_{4 (aq)} + H_{2} O (l)$
c)		${KNO}_{2} (aq) + H_{2} O_{2} (aq) \to {KNO}_{3} (aq)$ + $H_{2} O (l)$
d)

18. When two ice cubes are pressed over each other, they unite to form one cube .Wich of the fllowing forces s resonsible to hold them together?

a)		Hydrogen bond formation
b)		van der Waals forces
c)		Covalent attraction
d)		Ionic interacton

19. The boiling point of water is exceptionally high because

a)		There is covalent bond between H and O
b)		Water molecule is linear
c)		Water molecules associate due to hydrogen bonding
d)		Water molecule is not linear

20. Ametal which does not liberate $H_{2} (g)$ from acids is

a)		Cu
b)		Fe
c)		Mn
d)		Zn

21. Which of the following is correct for hydrogen ?

a)		It can form bonds in +1 as well as -1 oxidation state
b)		It is always collected at cathode
c)		It has a very high ionization potential
d)		It has same electronegativity as halogens

22. The volume strength of 1.5 N $H_{2} O_{2}$ solution is

a)		4.8
b)		5.2
c)		8.8
d)		8.4