Set of Important MCQs on the Chemistry of Hydrogen, Alkali And Alkaline Earth Metals in inorganic chemistry for the preparation of tests.
Dolomite is a mineral whose formula is
- CaCO3
- MgCO3
- CaCO3.MgCO3
- CaSO4
Question’s Answer: CaCO3.MgCO3
Which of the mentioned gas is lightest?
- Dihydrogen
- Helium
- Dinitrogen
- Dioxygen
Question’s Answer: Dihydrogen
According to recent views which is the accurate representation of hydrated proton in aqueous solutions?
- H+
- H9O5+
- H9O4+
- H3O+
Question’s Answer: H9O4+
Which isotope of hydrogen is/are radioactive in nature?
- Protium and deuterium
- Tritium only
- Tritium and deuterium
- Only deuterium.
Question’s Answer: Tritium only
What is the composition of Whetherite?
- BaSO4
- BaCO3
- SrSO4
- None of A, B, and C
Question’s Answer: BaCO3
Dolomite is a carbonate of which of the following?
- Na and Ba
- Ca and Mg
- K and Ca
- Mg and Sr
Question’s Answer: Ca and Mg
Which metal can produce dihydrogen gas by reaction with dil. H₂SO4?
- Ag
- Cu
- Fe
- Pt.
Question’s Answer: Fe
Which type of elements form ionic hydrides?
- Transition elements
- Metalloids
- Elements with high electronegativity
- Elements with high electro positivity
Question’s Answer: Elements with high electro positivity
Which is the process of adsorption of hydrogen on palladium?
- Syneresis
- Occlusion
- Diffusion
Question’s Answer: D. Erosion
Occlusion
Newly born hydrogen is known as ______.
- Protiumat
- Nascent hydrogen
- Atomic hydrogen
D. Heavy hydrogen
Question’s Answer: Nascent hydrogen
How three isotopes of hydrogen differ from one another?
- Atomic number
- Number of protons
- Nuclear charge
- Nuclear mass
Question’s Answer: Nuclear mass
Aluminum reacts with boiling water to liberate dihydrogen gas along with the formation of __________ .
- Aluminum oxide
- Aluminum hydroxide
- Aluminum suboxide
- Aluminum superoxide
Question’s Answer: Aluminum oxide
Which of the mentioned is an allotrope of hydrogen?
- 0-H2
- p-H₂
- Both A and B.
- None of A, B, and C
Question’s Answer: Both A and B.
When steam is passed over red hot coke. Which products will form?
- Hydrogen and carbon dioxide
- Mixture of hdyrogen and carbon monoxide
- Mixture of hydrogen and
- Heavy hydrogen oxygen
Mixture of hdyrogen and carbon monoxide
What is the accurate order of reactivity among:
- (atomic hydrogen);
- (Dihydrogen)
- (Nascent hydrogen) is
- 1>2>3
- 1>3>2
- 2>3>1
- 3>2>1
Question’s Answer: 1>3>2
Which elements do not produce hydrogen on treatment with caustic soda?
- Zn
- Mg
- AI
- Sn
Question’s Answer: Mg
The metal which produces hydrogen on 30 treatment with acid as well as caustic soda
- Zn
- Mg
- Fe
- None of A, B, and C
Question’s Answer: Zn
What is the structure of H2O2?
- Planar
- Non-planar
- Spherical
- Linear
Question’s Answer: Non-planar
Water gas is a mixture of __ and _____ .
A CO₂ and H₂
- CO and H
- CO₂ and H₂O
- CO and N₂
Question’s Answer: CO and H
Which of the mentioned is not an alkali metal?
- Potassium
- Francium
- Sodium
- Strontium
Question’s Answer: Strontium
Which is the lightest alkali metal?
- Lithium
- Sodium
- Rubidium
- Caesium
Question’s Answer: Lithium
The most abundant alkali metal is
- Potassium
- Rubidium
- Sodium
- Lithium
Question’s Answer: Sodium
What is the accurate order of ionization energies of alkali metals?
- Li > Na > K > Rb
- Na > K > Rb > Li
- Rb > K > Na > Li
- Rb > K > Li> Na
Question’s Answer: Li > Na > K > Rb
In which of the mentioned characteristics does hydrogen looks like halogens?
- Hydrogen is the lightest gas
- H atoms contains one electron each
- Hydrogen forms ionic hydrides with alkali metals
- Hydrogen has three isotopes.
Question’s Answer: Hydrogen forms ionic hydrides with alkali metals
In which of the following property hydrogen does not resemble alkali metals?
- Tendency to form cation
- Nature of oxide
- Combination with halogens
- Reducing character.
Question’s Answer: Nature of oxide
Which is the colour imparted by lithium to the flame?
- Golden yellow
- Grassy green
- Violet
- Red.
Question’s Answer: Red
What is the only oxidation state of alkali metals in their compounds?
- +1
- +2
- – 1
- 0
Question’s Answer: +1
Which of the mentioned is true for dilute solution of Na in liq. ammonia?
- It is blue
- It shows conductance
- It is paramagnetic
- None of A, B, and C
Question’s Answer: None of A, B, and C
Formula of gypsum is
- CaSO4
- CaSO4.2H₂O
- 2CaSO4.H2O
- CaSiO3
Question’s Answer: CaSO4.2H₂O
Which of the mentioned is true for concentrated solution of Na in liq. ammonia?
- It is deep blue
- The solution is non-conducting
- It is copper colored.
- None of A, B, and C
Question’s Answer: It is copper colored
Potassium crystallizes in a body centered lattice. Hence, the coordination number of potassium in potassium metal is
- 6
- 8
- 4
- 12
Question’s Answer: 8
Sodium reacts more vigorously than lithium because
- It is a metal
- It has higher atomic mass
- It is more electronegative
- It is more electropositive
Question’s Answer: It is more electropositive
The alkali metal that reacts with nitrogen directly to form nitride is
- Na
- K
- Rb
- Li
Question’s Answer: Li
The most reactive alkali metal among the following is
- Li
- Na
- Rb
- Cs
Question’s Answer: Cs
Potassium reacts with excess of oxygen to form
- K₂O
- K₂O₂
- K₂O3
- KO₂
Question’s Answer: KO₂
Sodium reacts with excess of oxygen to form
- Na₂O
- NaO₂
- Na₂O₂
- NaO
Question’s Answer: Na₂O₂
Which among the following is insoluble in water?
- LiOH
- NaOH
с. кон
- RbOH
Question’s Answer: LiOH
Which among the following is least soluble in water?
- NaF
- LiF
- KF
- CsF
Question’s Answer: LiF
Which of the mentioned reacts with excess oxygen to form a normal oxide?
- Li
- Na
- K
- Rb
Question’s Answer: Li
What is the accurate order of reducing power of alkali metal?
- Li > Na>K> Rb
- Na > K > Rb> La
- Cs >K> Na > La
- La >C > K > Na
Question’s Answer: Li > Na>K> Rb
Lithium shows diagonal relationship with which one?
- Beryllium
- Sodium
- Magnesium
- Calcium
Question’s Answer: Magnesium
Among alkali metals, Which is the least metallic element?
- Li
- Na
- Ce
- Rb
Question’s Answer: Li
In which of the following properties, hydrogen does not show resemblance with halogena.
- Electropositive character
- Electronegative character
- Neutral nature of H2O
- Atomicity.
- 1 and 3
- just 1
- 2 and 3
- 3 and 4.
Question’s Answer: 1 and 3
Which of the mentioned compounds liberates CO₂ on heating?
- Li2CO3
- Na2CO3
- K2CO3
- All liberate CO2 on heating
Question’s Answer: Li2CO3
Which of the mentioned has the maximum tendency to form complexes?,
- K
- Rb
- Na
- Li
Question’s Answer: Li
Baking powder has one of the following constituent
- NaOH
- NaHCO3
- KOH
- Na2CO3
Question’s Answer: NaHCO3
The formula of nitre is
- KNO
- RbNO3
- NaNO
- LiNO
Question’s Answer: KNO
Which of the mentioned elements has the highest melting point?
- Magnesium
- Calcium
- Strontium
- Beryllium
Question’s Answer: Beryllium
Which of the mentioned is the most abundant alkaline earth metal?
- Be
- Mg
- Ca
- Sr
Question’s Answer: Ca
Which of the mentioned alkaline earth metals occurs in radioactive form in nature?
- Ca
- Mg
- Ba
- Ra
Question’s Answer: Ra
Which of the elements of groups IIA has the highest value of IE?
- Mg
- Be
- Ca
- Sr
Question’s Answer: Be
Which of the mentioned is the strongest reducing agent?
- Be
- Mg
- Ca
- Sr
Question’s Answer: Be
Which of the mentioned elements has the highest value of IE?
- Na
- K
- Mg
- Ca
Question’s Answer: Mg
Metallic magnesium is obtained by
- Reduction of MgO with coke
- Electrolysis of an aqueous solution of MgCl2
- Electrolysis of molten MgCl2
- Displacement of magnesium by iron from MgCl2 solution
Question’s Answer: Electrolysis of an aqueous solution of MgCl2
Electrometallurgy is applicable to which one metal
- Fe
- Na
- Pb
- Ag
Question’s Answer: Na
Drying agent which reacts with CO2 and removes water vapors is
- CaO
- CaCl2
- CaCO3
- Ca(NO3) 2
Question’s Answer: CaO
Beryllium shows diagonal relationship with
- Mg
- Na
- Al
- B
Question’s Answer: Al
Which of the mentioned is the weakest base?
- KOH
- NaOH.
- LiOH
- RbOH
Question’s Answer: LiOH
Magnesium burns in air to give
- MgO
- MgCO3
- Mg3N2
- Both A. and C
Question’s Answer: Both A. and C
Thermal stability of MNO, (M-alkali metals)
- Decreases down the group
- Increases down the group
- Does not follow regular pattern
- Remains almost similar
Question’s Answer: Increases down the group
The formula of bleaching powder is
- CaOCl2
- CaClO3
- Ca(ClO3)2
- CaOCl
Question’s Answer: CaOCl2
Which of the mentioned carbonates decomposes at the highest temperature?
- MgCO3
- CaCO3
- SrCO3
- BaCO3
Question’s Answer: BaCO3
The wire of flash bulb is made up of
- Cu
- Ag
- Mg
- Ba
Question’s Answer: Mg
Which of the mentioned metals is the most abundant in the earth’s crust?
- Mg
- Na
- Ca
- K
Question’s Answer: Ca
Of the following the commonly helpful and used in the laboratory desiccator is
- Anhyd. Na2CO3
- Anhyd. CaCl2
- Dry NaCl
- None of A, B, and C.
Question’s Answer: Anhyd. CaCl2
Setting of Plaster of Paris involves
- Oxidation with atmospheric oxygen
- Combination with atmospheric CO2
- Dehydration
- Hydration to yield another hydrate
Question’s Answer: Hydration to yield another hydrate
The most common oxidation state of alkaline earth metals is
- + 1
- +2
- -2
- -1
Question’s Answer: +2
Which of the mentioned elements has the highest density?
- Mg
- Na
- K
- Rb
Question’s Answer: Mg
When calcium is heated in the flame of a Bunsen burner, the color imparted to the flame is
- Golden yellow
- Brick red
- Crimson red
- Grassy green
Question’s Answer: Brick red
Which of the mentioned elements with excess oxygen to form peroxides?
- Ca
- Mg
- Li
- Ba
Question’s Answer: Ba
Lime water is an aqueous solution of ______ .
- MgSO3
- Ca(OH)2
- CaCO3
- CaSO4
Question’s Answer: Ca(OH)2
Which of the mentioned elements does not impart any characteristic colour to the flame?
- Ca
- Mg
- Ba
- Sr
Question’s Answer: Mg
Silvite is an ore of
- Ca
- Mg
- Ba
- K
Question’s Answer: K
Barite is an ore of
- Ca
- Mg
- Ba
- K
Question’s Answer: Ba
Magnesite is an ore of _____.
- Ca
- Mg
- Ba
- K
Question’s Answer: Mg
Calcite is an ore of which of the following?
- Ca
- Mg
- Ba
- K
Question’s Answer: Ca
Dolomite is an ore of which of the following?
- Ca
- Mg
- Ba
- Both Ca and Mg
Question’s Answer: Both Ca and Mg
Halite is a chemical name of which of the following?
- KCI
- NaCl
- MgCl2
- SrCl2
Question’s Answer: NaCl
Mg is present in
- Ascorbic acid
- Haemoglobin
- Vitamin E
- Chlorophyll
Question’s Answer: Chlorophyll
Which of the sulfate is helpful and used in diagnosis of stomach ulcer?
- SrSO4
- BaSO4
- CaSO4
- BeSO4
Question’s Answer: BaSO4
Down’s cell is helpful and used to prepare which of the following?
- BaSO4
- Na
- NaOH
- NaHCO3
Question’s Answer: Na
Which is produced at cathode during the electrolysis of brine in Nelson’s cell?
- Na
- H2
- Cl2
- 02
Question’s Answer: H2
What is the formula of Epsom salt?
- CaSO4.7H2O
- SrSO4.7H₂O
- BaSO4.7H2O
- MgSO4.7H2O
Question’s Answer: MgSO4.7H2O
Which of the mentioned oxides is
- Cao
- BaO
- BeO
- MgO
Question’s Answer: BeO
Which of the mentioned hydroxides is most stable?
- Mg(OH)2
- Ca(OH)2
- Sr(OH)2
- Ba(OH)2
Question’s Answer: Ba(OH)2
In which of the mentioned reactions does dihydrogen works as oxidising agent?
- Ca + Hy à
- H₂+O à
- H₂+ F à
- CuO+ H à
Question’s Answer: Ca + Hy à
Which of the mentioned is not true as compared with alkaline earth metals?
- Alkali metals are more reactive
- Alkali metals have lower density
- Alkali metals are more electropositive
- Alkali metals have stronger metallic bonds
Question’s Answer: Alkali metals have stronger metallic bonds
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