CBSE Questions for Class 11 Medical Chemistry Hydrogen Quiz 2 - MCQExams.com

The fuel used to produce electrical energy in the space rocket Saturn V, used by Neil Armstrong to reach the moon was:
  • $$CO+O_{2}$$
  • $$F_{2}+O_{2}$$
  • $$CH_{4}+O_{2}$$
  • liquid $$H_{2}+O_{2}$$
Metal hydride on treatment with water gives________.
  • $$H_{2}O_{2}$$
  • $$H_{2}O$$
  • acid
  • hydrogen
Hydrogen does not resemble alkali metals in which one of the following properties?
  • Tendency to form cation
  • Nature of oxide
  • Combination with halogens
  • Reducing character
Hydrogen finds a place in VII A group of periodic table because_________.
  • it is a light element
  • $$H -$$ atom has only one electron in its valence shell
  • it forms hydride of the type $$NaH$$
  • it has $$7$$ isotopes
The lightest element in the periodic table is_________.
  • lithium
  • fluorine
  • hydrogen
  • helium
$$H_{2}O_{2}$$ present in the atmosphere is formed by the action of sunlight on the atmospheric:
  • $$H_{2}$$ and $$O_{2}$$
  • $$H_{2}O$$ and $$O_{3}$$
  • moisture and $$O_{2}$$
  • $$H_{2}O$$ and $$SO_{2}$$
The peroxide linkage $$(-O-O-)$$ is not present in:
  • $$H_{2}SO_{5}$$
  • $$CrO_{5}$$
  • $$HNO_{4}$$
  • $$HClO_{4}$$
$$H_{2}O_{2}$$ forms prismatic crystals at:
  • $$0^{o}C$$
  • $$2^{o}C$$
  • $$2K$$
  • $$-1.7^{o}C$$
The product obtained at anode when $$50\%\: H_{2}SO_{4}$$ aqueous solution is electrolysed using platinum electrodes is :
  • $$H_{2}SO_{3}$$
  • $$H_{2}S_{2}O_{8}$$
  • $$O_{2}$$
  • $$H_{2}$$
The melting point of most of the solid substances increases with an increase in pressure. However ice melts at a temperature lower than its usual melting points when pressure is increased. This is because:
  • the density of ice is lesser than $$H_{2}O$$
  • pressure generates heats
  • the chemical bonds break under pressure
  • ice is not a true solid
Electrolysis of $$50\%\: H_{2}SO_{4}$$ produces:
  • $$H_{2}S_{2}O_{8}$$ at anode
  • $$H_{2}$$ at anode
  • $$H_{2}SO_{5}$$ at cathode
  • $$H_{2}O_{2}$$ at anode
Catalytic union of $$H_{2}$$ and $$O_{2}$$to get $$H_{2}O_{2}$$ is:
  • auto oxidation
  • electrolysis of $$50\%\:Na_{2}O_{2}$$
  • hydrolysis of aqueous solution of $$\left ( NH_{4} \right )_{2}SO_{4}+H_{2}SO_{4}$$
  • treating $$Na_{2}O_{2}$$ with cold dil. $$Na_{2}O_{2}$$
Which of the following compound gives $$H_{2}O_{2}$$ by the addition of $$H_{2}O$$?
  • $$CO(NH_2)_2.H_2O_2$$
  • $$Na_{2}HPO_{4}.H_{2}O_{2}$$
  • $$(NH_{4})_{2}SO_{4}.H_{2}O_{2}$$
  • All of the above
Which one of the following compounds undergoes hydrolysis during distillations to yield hydrogen peroxide?
  • $$H_{2}S_{2}O_{8}$$
  • $$H_{2}S_{2}O_{6}$$
  • $$HNO_{3}$$
  • $$H_{4}P_{2}O_{7}$$
In the preparation of $$H_{2}O_{2}$$ by auto-oxidation method, the starting substance is:
  • 2-ethylanthraquinone.
  • 2-ethylanthraquinol.
  • p-benzoquinone.
  • N-methylaniline.
Assertion (A): Hydrogen shows resemblance with alkali metals as well as halogens.
Reason (R): Hydrogen exists in atomic form only at high temperature.
  • Both A and R are true and R is the correct explanation of A
  • Both A and R are true but R is not a correct explanation of A
  • A is true but R is false
  • A is false but R is true
In the hydrogen peroxide molecule :
  • two hydrogen atoms are connected to one of the oxygen
  • all the four atoms are in the same plane
  • the four atoms are arranged in a non-linear and non-planar manner
  • $$O-H$$ bonds are polar but molecule is non-polar
In case of $$H_{2}O_{2}$$ in solid state, the angle between the planes containing $$H-$$atoms is:
  • $$100^{o}$$
  • $$90^{o}$$
  • $$109^{o}28^{'}$$
  • $$180^{o}$$
In $$H_{2}O_{2}$$ molecule the O-O bond length is:
  • $$1.34 \mathring{A}$$
  • $$1.48 \mathring{A}$$
  • $$1.54 \mathring{A}$$
  • $$1.20 \mathring{A}$$
What is the solution used for the preparation of hydrogen peroxide by electrolytic procedure?
  • $$0.2 N  NaOH$$
  • $$50$$% $$H_{2}SO_{4}$$
  • $$20$$% $$NaOH$$
  • $$5$$% $$NaCl$$
In $$H_{2}O_{2}$$, the degree of hydrogen bonding is:
  • same as in water
  • more than in water
  • less than in water
  • zero
The angle between the planes of $$H_{2}O_{2}$$ molecule in gaseous phase is:
  • $$101.5^{o}$$
  • $$90^{o}$$
  • $$111.5^{o}$$
  • $$109^{o}28^{'}$$
Which of the following is a linear molecule?
  • $$H_{2}O$$
  • $$H_{2}O_{2}$$
  • $$D_{2}O$$
  • $$N_{2}O$$
Hydrogen peroxide has a:
  • linear structure
  • closed chain structure
  • closed book structure
  • open book structure

Statement-1: Both sodium and hydrogen have outer electronic configuration $$ns^{1}$$ but hydrogen is less reactive than sodium.
Statement-2: Hydrogen has greater ionisation energy.
  • Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1
  • Statement-1 is true, Statement-2 is True; Statement-2 is not a correct explanation for Statement-1
  •  Statement-1 is true,  Statement-2 is false
  •  Statement-1 is false,  Statement-2 is true
$$30$$ volume hydrogen peroxide means:
  • $$30\%\:H_{2}O_{2}$$ solution
  • $$30\:\text{cm}^{3}$$ of the solution contains $$1$$ g of $$H_{2}O_{2}$$
  • $$1\:\text{cm}^{3}$$of the solution liberates $$30\:\text{cm}^{3}$$ of $$O_{2}$$ at STP
  • $$30\:\text{cm}^{3}$$ of the solution contains $$1$$ mole of $$H_{2}O_{2}$$
One ml of $$H_{2}O_{2}$$ solution gives $$50$$ ml of $$O_{2}$$ at NTP, so it is:
  • $$10$$ vol
  • $$25$$ vol
  • $$50$$ vol
  • $$100$$ vol
$$3.4$$ g of $$H_{2}O_{2}$$ decomposes, the weight of oxygen liberated from it is:
  • $$1.6$$ g
  • $$2.24$$ g
  • $$1.16$$ g
  • $$3.2$$ g
The volume of $$20\:V-H_{2}O_{2}$$ solution, required to prepare $$5$$ litres of oxygen at STP is:
  • $$125$$ ml
  • $$250$$ ml
  • $$100$$ ml
  • $$50$$ ml
The volume of perhydrol which on decomposition gives 1.5 lit of $$O_{2}$$ gas at STP is:
  • $$25$$ ml
  • $$15$$ ml
  • $$10$$ ml
  • $$20$$ ml
The volume strength of $$15\%$$ (w/v) solution of $$H_{2}O_{2}$$ is :
  • $$50$$
  • $$4.94$$
  • $$494$$
  • $$0.494$$
The volume (in ml) of oxygen liberated at STP when $$100$$ ml of $$15\:V$$ $$H_{2}O_{2}$$ decomposes is:
  • $$150$$
  • $$300$$
  • $$3000$$
  • $$1500$$
The volume strength of $$3N\:H_{2}O_{2}$$ solution is:
  • $$11.2\:\text{V}$$
  • $$8.4\:\text{V}$$
  • $$22.4\:\text{V}$$
  • $$16.8\:\text{V}$$
The $$\%$$ by weight of hydrogen in $$H_{2}O_{2}$$ is :
  • $$50$$
  • $$25$$
  • $$6.25$$
  • $$5.88$$
$$H_{2}O_{2}$$ turns blackened lead paintings to white colour. In this reaction it oxidizes $$PbS$$ to $$PbSO_{4}$$. The number of moles of $$H_{2}O_{2}$$ needed to oxidize $$0.1$$ moles of $$PbS$$ is:
  • 1 mole
  • 0.1 mole
  • 0.5 mole
  • 0.4 mole
The co-ordination number of $$Na$$ in solid $$NaH$$ is:
  • $$4$$
  • $$6$$
  • $$8$$
  • $$12$$
The reaction between $$H_2O_2$$ and $$KMnO_4$$ is $$2KMnO_4+3H_2SO_4+5H_2O_2 \rightarrow K_2SO_4+2MnSO_4+8H_2O+5O_2$$. 
In a reaction excess of $$H_2O_2$$ is added to 0.1 mole of acidified $$KMnO_4$$ solution. Then the STP volume of $$O_2$$ liberated is:
  • 5.6 L
  • 6.6 L
  • 11.2 L
  • 22.4 L
The concentration of $$H_{2}O_{2}$$ in a solution containing 34 gm in 500ml is given in List I and their corresponding values are given in List II. Then match List I with List II.

List I                         List II
A) Molarity
1) 68
B) Normality
2) 22.4
C) % w/v
3) 4
D) Volume strength
4) 2

5) 10
  • (A)-5, (B)-3, (C)-1, (D)-2
  • (A)-4, (B)-3, (C)-1, (D)-2
  • (A)-3, (B)-4, (C)-1, (D)-2
  • (A)-1, (B)-2, (C)-3, (D)-4
Strength of 2N $$H_{2}O_{2}$$ solution is approximately:
  • 10 volumes
  • 44.8 volumes
  • 22.4 volumes
  • 11.2 volumes
The number of electrons involved in the manufacture of 1 mole of $$H_{2}O_{2}$$ from 50% $$H_{2}SO_{4}$$:
  • 2 moles
  • 3 moles
  • 1 mole
  • 4 moles
The weight - volume percentage (w/v) of $$10\ V$$ $$H_{2}O_{2}$$ solution is: 
  • $$6$$%
  • $$2$$%
  • $$11$$%
  • $$3$$%
Which ionic hydride is stable upto its melting point?
  • $$NaH$$
  • $$CaH_{2}$$
  • $$LiH$$
  • $$BaH_{2}$$
Weight of $$H_{2}O_{2}$$ present in $$560$$ ml of $$20$$ volume $$H_{2}O_{2}$$ solution is approximately:
  • 69 g
  • 34 g
  • 32 g
  • 3.4 g
The volume strength of $$1N$$ $$H_{2}O_{2}$$ solution is:
  • $$11.2\: V$$
  • $$22.4\: V$$
  • $$1\: V$$
  • $$5.6\: V$$
$$50$$ ml of a certain sample of $$H_{2}O_{2}$$ gives $$1200$$ ml of $$O_{2}$$ at STP. The volume strength of $$H_{2}O_{2}$$ is:
  • 22.4 V
  • 20 V
  • 24 V
  • 11.2 V
Elements of which of the following groups do not form hydrides?
  • $$1,2,3$$
  • $$3,4,5$$
  • $$7,8,9$$
  • $$6,7,8$$

Statement-1: $$CaH_{2}$$ is used as main source to transport gas as 1 pound of it gives 16.5 cubic feet $$H_{2}$$.
Statement-2: It is difficult to transport $$H_{2}$$ gas.
  • Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.
  • Statement-1 is True, Statement-2 is True; Statement-2 is not a correct explanation for Statement-1.
  • Statement-1 is true, Statement-2 is false.
  • Statement-1 is false, Statement-2 is true.
An excess of acidified solution of $$KI$$ is added to a $$25$$ mL $$H_2O_2$$ solution. The iodine liberated requires $$20$$ mL of $$0.3\ N\ Na_2S_2O_3$$ solution. Calculate the volume strength of $$H_2O_2$$:
  • $$1.144$$
  • $$1.244$$
  • $$1.344$$
  • $$1.444$$
Assertion: Reducing power of nascent hydrogen is more than atomic hydrogen.
Reason: Bond energy of hydrogen is maximum.
  • Both Assertion & Reason are correct and Reason is correct explanation of Assertion
  • Both Assertion & Reason are correct but Reason is not correct explanation of Assertion
  • Assertion is correct but Reason is incorrect
  • Assertion is wrong but Reason is correct
Excess of $$KI$$ and dil. $$H_2SO_4$$, were mixed in $$50$$ ml $$H_2O_2$$. The $$I_2$$ liberated required $$20$$ ml of $$0.1$$ N $$Na_2S_2O_3$$. Find out the strength of $$H_2O_2$$ in $$g/lit^{-1}$$?
  • $$0.17 g/lit$$
  • $$0.34 g/lit$$
  • $$0.68 g/lit$$
  • $$1.36 g/lit$$
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