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Hydrocarbon mcq for NEET. We covered all the Hydrocarbon mcq for NEET in this post for free so that you can practice well for the exam.
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mcq on Hydrocarbon for NEET Students
When burned in air, which element produces both a nitride and a monoxide?
a) Lithium
b) Sodium
c) Potassium
d) Rubidium
Option a – Lithium
Xenon and fluorine in a 2:1 ratio are heated at 673 K and 1 bar in a sealed nickel container. After rapid cooling, a colorless Solid ‘Y’ is formed. What is ‘Y’?
a) XeF₂
b) XeF₄
c) XeF₆
d) XeOF₄
Option a – XeF₂
The outer electronic configurations of two elements ‘P’ and ‘Q’ are 3s¹ and 5s¹. Which statement about them is accurate?
a) Their ionic sizes are both smaller than that of potassium.
b) They emit the same flame color.
c) Both form superoxides (MO₂) on combustion.
d) Their hydroxides are freely soluble in water with Heat release.
Option d – Their hydroxides are freely soluble in water with Heat release.
What is the oxidation number of phosphorus in pyrophosphoric Acid?
a) +1
b) +3
c) +4
d) +5
Option d – +5
Element A from Group 1 and period 2 shows diagonal similarity with element B from Group 2. What are their atomic numbers?
a) 3 and 12
b) 4 and 13
c) 3 and 13
d) 4 and 11
Option a – 3 and 12
Which alkali metal carbonate has the lowest thermal stability?
a) Na₂CO₃
b) Li₂CO₃
c) K₂CO₃
d) Rb₂CO₃
Option b – Li₂CO₃
What is the change in oxidation state when magnesium burns in oxygen?
a) 0 to +1
b) 0 to +2
c) +1 to +2
d) +2 to +4
Option b – 0 to +2
Boron trifluoride is reduced by LiAlH₄ in Ether to give a boron compound. Which alternative method can also produce it?
a) Heating orthoboric Acid above 370 K
b) Acidifying borax with dilute HCl
c) Oxidizing sodium borohydride with iodine
d) Burning amorphous boron in air
Option c – Oxidizing sodium borohydride with iodine
Which statement is incorrect about actinides and lanthanides?
a) Actinides more readily form complexes than lanthanides
b) 4f orbitals in lanthanides have lower binding energy than 5f in actinides
c) Actinide contraction is more pronounced than lanthanide contraction
d) Actinides have more complex magnetic properties than lanthanides
Option b – 4f orbitals in lanthanides have lower binding energy than 5f in actinides
Which element reacts with hot concentrated sulfuric Acid to produce its sulfate, sulfur dioxide, and water?
a) N₂
b) P₄
c) As₄
d) Bi
Option d – Bi
Hypobromous Acid and perbromic Acid share what common structural feature?
a) Both contain Br in +7 oxidation state
b) Both contain one Br=O bond
c) Both have a single O–H bond
d) Both have an identical number of oxygen atoms
Option c – Both have a single O–H bond
A metal that forms a water-soluble sulfate and a sparingly soluble hydroxide (X(OH)₂), with both its oxide and hydroxide being amphoteric, is likely to be:
a) Be
b) Mg
c) Ca
d) Ba
Option a – Be
For group 15 hydrides (EH₃), what is the correct order of increasing E–H bond length?
a) NH₃ < PH₃ < AsH₃ < SbH₃
b) SbH₃ < PH₃ < AsH₃ < NH₃
c) SbH₃ < AsH₃ < PH₃ < NH₃
d) NH₃ < PH₃ < SbH₃ < AsH₃
Option a – NH₃ < PH₃ < AsH₃ < SbH₃
A colorless Solid ‘X’ evolves CO₂ when heated and leaves behind a white Solid that dissolves in water and also releases CO₂ with dilute Acid. What is ‘X’?
a) Na₂CO₃
b) K₂CO₃
c) NaHCO₃
d) Mg(HCO₃)₂
Option c – NaHCO₃
An S–O–S bond exists in which of the following compounds?
a) H₂S₂O₃
b) H₂S₂O₈
c) H₂S₂O₆
d) H₂S₂O₇
Option d – H₂S₂O₇
Which element displays a +7 oxidation state?
a) Americium (Z = 95)
b) Plutonium (Z = 94)
c) Uranium (Z = 92)
d) Curium (Z = 96)
Option b – Plutonium (Z = 94)
The first ionization energy of magnesium is:
a) Lower than calcium
b) Higher than beryllium
c) Higher than sodium
d) Lower than aluminum
Option c – Higher than sodium
In which oxidation state is vanadium (Z = 23) diamagnetic?
a) +2
b) +3
c) +4
d) +5
Option d – +5
Chlorine reacts with ammonia to give compound A and nitrogen. With excess chlorine, it forms compound B and HCl. What are A and B?
a) A = NH₄Cl, B = NCl₃
b) A = NCl₃, B = NH₄Cl
c) A = N₂H₄, B = NCl₃
d) A = NH₄Cl, B = N₂H₄
Option a – A = NH₄Cl, B = NCl₃
Assuming full ionization, which of the following compounds requires the least amount of acidified KMnO₄ for complete oxidation?
a) Na₂SO₃
b) NaNO₂
c) KI
d) H₂C₂O₄
Option c – KI
Kieselguhr represents which form of silica?
a) Tridymite
b) Cristobalite
c) Quartz
d) Amorphous
Option d – Amorphous
A mixture with 3 moles each of Li₂CO₃ and K₂CO₃ is heated. How many moles of CO₂ are released?
a) 1
b) 3
c) 6
d) 9
Option b – 3
Among these transition elements, which is expected to have the highest third ionization enthalpy?
a) Vanadium (Z = 23)
b) Manganese (Z = 25)
c) Chromium (Z = 24)
d) Iron (Z = 26)
Option b – Manganese (Z = 25)
Which SET of statements about oxides is correct?
a) B₂O₃ is acidic; In₂O₃ is amphoteric; Ga₂O₃ is acidic; Th₂O₃ is basic
b) B₂O₃ and Ga₂O₃ are acidic; In₂O₃ and Th₂O₃ are amphoteric
c) B₂O₃ is acidic; In₂O₃ is amphoteric
d) Ga₂O₃ and Th₂O₃ are acidic
Option d – Ga₂O₃ and Th₂O₃ are acidic
Which compound pair has both Metals in their maximum oxidation states?
a) V₂O₃ and FeO
b) Mn₂O₇ and CrF₆
c) CrO₃ and Cu₂O
d) TiO₂ and MnO₂
Option b – Mn₂O₇ and CrF₆
Choose the incorrect statement regarding Group 2 Metals:
a) Sulfate solubility decreases down the group
b) Hydroxide solubility decreases down the group
c) Carbonate thermal stability increases down the group
d) Hydroxide basicity increases down the group
Option b – Hydroxide solubility decreases down the group
SiCl₄ is more easily hydrolyzed than CCl₄ because:
a) Both are true and the reason explains the assertion
b) Both are true but the reason doesn’t explain the assertion
c) Assertion is true but reason is false
d) Assertion is false but reason is true
Option a – Both are true and the reason explains the assertion
Identify the false statement about hypophosphorous Acid:
a) Phosphorus has +1 oxidation state
b) Produced by boiling phosphorus with barium hydroxide, then treated with sulfuric Acid
c) It is a dibasic Acid
d) Contains one P–OH, two P–H, and one P=O bond
Option c – It is a dibasic Acid
In the ground state, how many electrons does protactinium (Z = 91) have in the 5f orbital?
a) 0
b) 1
c) 2
d) 3
Option c – 2
Which is a correct property of barium?
a) Its oxide is amphoteric
b) It does not react with water
c) Forms soluble sulfate
d) Forms water-soluble hydroxide
Option d – Forms water-soluble hydroxide
Choose the incorrect property of nitric oxide (NO):
a) Diamagnetic in gas phase
b) Paramagnetic in gas phase
c) Exists as dimer in liquid phase
d) Odd-electron Molecule in gas phase
Option a – Diamagnetic in gas phase
Noble gas ‘X’ is used in miner’s lamps; ‘Y’ in cancer radiotherapy. Identify them:
a) Krypton and Radon
b) Argon and Xenon
c) Neon and Helium
d) Xenon and Radon
Option a – Krypton and Radon
Choose the incorrect statement regarding dichromate:
a) Cr–O–Cr angle is 126°
b) Sodium dichromate is more water-soluble than potassium dichromate
c) Cr is in +6 oxidation state
d) Chromate ion has trigonal pyramidal geometry
Option d – Chromate ion has trigonal pyramidal geometry
In cyclotrimetaphosphoric acid, how many single and double bonds are present?
a) 3
b) 6
c) 9
d) 12
Option d – 12
What is the nature of a dilute solution of sodium in liquid ammonia?
a) Bronze and diamagnetic
b) Blue and diamagnetic
c) Bronze and paramagnetic
d) Blue and paramagnetic
Option d – Blue and paramagnetic
What is the geometry of XCOF₄?
a) Square planar
b) Octahedral
c) Trigonal bipyramidal
d) Square pyramidal
Option d – Square pyramidal
Choose the correct statement about aluminum:
a) It is the second most abundant element in Earth’s crust
b) Kernite is a major aluminum ore
c) Reacts with HCl but not with aqueous NaOH
d) Reacts with nitrogen at high temperature to form nitride
Option d – Reacts with nitrogen at high temperature to form nitride
When concentrated H₂SO₄ reacts with copper, gas X is released. Gas Y, formed by Deacon’s process, reacts with X in sunlight to produce:
a) HOCl
b) SO₂Cl₂
c) COCl₂
d) SO₃
Option b – SO₂Cl₂
Which pair includes only actinoids?
a) Fermium and Thorium
b) Holmium and Curium
c) Nobelium and Samarium
d) Berkelium and Europium
Option a – Fermium and Thorium
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