NEET Chemistry Chapter Wise Mock Test – Hydrogen

NEET Chemistry Chapter Wise Mock Test – Hydrogen

Question 1:

Question 2:
Which pair does not show hydrogen isotopes?
(a) Ortho hydrogen and para hydrogen
(b) Protium and deuterium
(c) Deuterium and tritium
(d) Tritium and protium

Question 3:
Hydrogen is not obtained when zinc reacts with
(a) dil. HCI
(b) hot NaOH solution
(c) cold water
(d) cone. H2S04

Question 4:

Question 5:
Hydrogen can be prepared by the action of dil. H₂S0₄ on
(a) copper
(b) iron
(c) lead
(d) mercury

Question 6:
Hydrogen gas is not liberated when the following metal is added to dil. HCI.
(a) Ag
(b) Zn
(c) Mg
(d) Sn

Question 7:
Very pure hydrogen (99.9) can be made by which of the following processes?
(a) Reaction of methane with steam
(b) Mixing natural hydrocarbons of high molecular weight
(c) Electrolysis of water
(d) Reaction of salts like hydrides with water

Question 8:
The adsorption of hydrogen by metals is called
(a)adsorption
(b) occlusion
(c) hydrogenation
(d) dehydrogenation

Question 9:
When electric current is passed through an ionic hydride in the molten state
(a) hydrogen is liberated at the cathode
(b) hydrogen is liberated at the anode
(c) no reaction takes place
(d) hydride ion migrates towards cathode

Question 10:
An element reacts with hydrogen to form a compound A which on treatment with water liberates hydrogen gas.The element can be
(a) Cl
(b) Se
(c) N
(d) Ca

Question 11:

Question 12:
Elements of which of the following group(s) of periodic table do not form hydrides?
(a) Groups 7, 8, 9
(b) Group 13
(c) Groups 15, 16, 17
(d) Group 17

Question 13:
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

Question 14:
Saline hydrides are known to react with water violently producing fire. The fire cannot be extinguished by CO₂ because
(a) C02 is lighter than the gas evolved
(b) C02 is heavier than the gas evolved
(c) C02 gets reduced by the evolved gas
(d) C02 gets oxidised by the evolved gas

Question 15:
The increasing order of reducing property of NaH,MgH2 and H20 is
(a) NaH < H₂0 < MgH₂
(b) MgH₂ < H₂0 < NaH
(c) H₂0 < MgH₂ < NaH
(d) NaH < MgH₂ < H₂0

Question 16:
Which of the following statements do not define the characteristic property of water.“Water is a universal solvent”?
(a) It has high liquid range
(b) It has very low dielectric constant
(c) It can dissolve maximum number of compounds
(d) None of the above

Question 17:
The critical temperature of water is higher than 0₂ because H₂0 molecules have
(a) fewer electrons than oxygen
(b) two covalent bonds
(c) dipole moment
(d) V-shaped

Question 18:
If same mass of liquid water and a piece of ice is taken, then why is the density of ice less than that of liquid water?
(a) Because ice is a solid
(b) Because molecules of ice are closely packed
(c) Because vacant spaces are present in the crystal lattice
(d) The given statement is wrong

Question 19:

Question 20:

Question 21:
The hardness of water is estimated by
(a) EDTA method
(b) titrimetric method
(c) conductivity method
(d) distillation method

Question 22:
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Question 23:
Which of the following is not true?
(a) D₂0 freezes at lower temperature than H₂O
(b) Reaction between H₂ and Cl₂ is much faster than D2 andCI2
(c) Ordinary water lectrolysed more rapidly than D₂0
(d) Bond dissociation energy is greater thanH2

Question 24:
Phosphoric acid is preferred over sulphuric acid in preparing hydrogen peroxide from peroxides because
(a) H₂S0₂ acts as a reducing agent
(b) H₂S0₂ gives BaS0₂ which is difficult to separate
(c) H₂S0₂ act as catalyst
(d) Both (b) and (c)

Question 25:
There is a sample of 10 volume of hydrogen peroxide solution. Calculate its strength.
(a) 3.035%
(b) 3%
(c) 2.509%
(d) 4.045%

Question 26:

Question 27:

Question 28:

Question 29:

Direction (Q. NOS. 31-32) In the following questions more than one of the answers given may be correct. Select the correct answers and mark it according to the codes.
Codes
(a) 1, 2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct

Question 30:

Question 31:
Hydrogen can be obtained from water, by the action of water on
(a)calcium carbide
(b) calcium hydride
(c) calcium oxide
(d) calcium

Question 32:
Heavy water is used as
(a) moderator
(b) controller
(c) coolant
(d) fuel rods

Question 33:

Direction (Q. NOS. 34-37) Each of these questions contains two statements : Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below
(a) Assertion is true, Reason is true; Reason is the correct explanation for Assertion
(b) Assertion is true, Reason is true; Reason is not the correct explanation for Assertion
(c) Assertion is true, Reason is false
(d) Assertion is false, Reason is false

Question 34:
Assertion Water in liquid state is more stable than ice at room temperature.
Reason Water in liquid form has higher entropy than ice.

Question 35:
Assertion Water has high boiling point.
Reason Water shows hydrogen bonding.

Question 36:
Assertion Hard water is more suitable than soft water.
Reason Hard water can be used in steam boilers.

Question 37:
Assertion H202 undergoes disproportionation on heating.
Reason It gives HgO and 0₂ on heating.

Question 38:

Question 39:

Question 40:

Answers:

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