1. Which of the following represents the general electronic configuration of an element belonging to the p-block of the periodic table?

a) (n-2)f⁰(n-1)d⁰ns² np^{0 -6}

b) (n-2)f⁰(n-1)d^{1 – 10} ns² np^{1- 6}

c) (n-2)f⁰(n-1)d⁰ ns²np^1-6

d) (n-2)f^{1- 14}(n-1)d^{1- 10}ns²np^{1- 6}

2. What happens to the size of atoms of elements of p-block as we move from left to right in the same period?a) Size increases

b) Size decreases

c) Size does not change

d) Size increases then decreases

6. Which gas is released when copper chips are subjected to concentrated nitric acid?

a) Nitrogen (I) oxide

b) Nitrogen (II) oxide

c) Nitrogen (III) oxide

d) Nitrogen (IV) oxide

11. Which of the following compounds can be used to obtain free nitrogen?

a) NaNO₂

b) HNO₂

c) HNO₃

d) Ba₃N₂

3. Which of the following is true about dinitrogen oxide?

a) It is yellow in colour

b) The oxidation state of nitrogen is +5

c) It is basic in nature

d) It is a colourless gas

7. What is the IUPAC name of NOCl?

a) Nitrogen monoxy chloride

b) Chloroxy nitrogen

c) Nitroxy chlorine

d) Nitrosyl chloride

15. What is the bond angle between the oxygen atoms in nitrogen dioxide?

a) 120°

b) 124°

c) 130°

d) 134°

8. What product(s) is/are formed when aluminum metal is treated with concentrated nitric acid?

a) Al (NO₃) ₃

b) Al (NO₂) ₃ + H₂

c) Al₂O₃

d) Al₄O₃

10. How many moles of nitric acid is required to convert 1 mole of sulfur to sulfuric acid?

a) 10

b) 4

c) 48

d) 20

7. Which of these gases is released upon treating zinc with diluted and then concentrated nitric acid?

a) Nitrogen dioxide and nitrous oxide

b) Nitric oxide and nitrous oxide

c) Nitrous oxide and nitrogen dioxide

d) Nitrous oxide and nitric oxide

5. What is the catalyst used in the industrial manufacture of nitric acid?

a) Powdered iron (III) oxide

b) Vanadium (V) oxide

c) Zinc-mercury amalgam

d) Platinum-Rhodium gauze sheet

9. Which allotrope of phosphorus is also called yellow phosphorus?

a) Black phosphorus

b) Red phosphorus

c) Beta- black phosphorus

d) White phosphorus

7. Which allotrope of phosphorus does not catch fire easily?

a) White phosphorus

b) Alpha- black phosphorus

c) Beta- black phosphorus

d) Red phosphorus

1. Which allotrope of phosphorus is the most stable?

a) White phosphorus

b) Red phosphorus

c) Black phosphorus

d) Phosphine

6. What is the reaction involved in Holmes signal?

a) Ca₃P₂ + 6H₂O → 2PH₃ + 3Ca(OH) ₂

b) Ca₃P₂ + 6H₂O → 2PH₃ → P₂H₄ + P₄O₆ and CaC₂ + H₂O → C₂H₂

c) Ca₃P₂ + 6HCl → 2PH₃ + 3CaCl₂

d) P₄ + 3NaOH + 3H₂O → PH₃ + 3NaH₂PO₂

7. What is the hybridization of phosphine?

a) sp² hybridized

b) sp³ hybridized

c) sp hybridized

d) No hybridization

5. Which of the following gas is used as Holmes signal?

a) Hydrogen per oxide

b) Nitrogen

c) Acetylene

d) Phosphine

7. How does PCl₅ exist in its solid state?

a) [PCl₄]⁺[PCl₆]^–

b) [PCl₃]²⁺[PCl₇]^2-

c) [PCl₂]³⁺[PCl₈]^3-

d) [PCl₅][PCl₅]

5. Which of the following is most stable?

a) AsCl₅

b) SbCl₅

c) PCl₅

d) BiCl₅

9. Which of the following is not formed on hydrolysis of PCl₅?

a) POCl₃

b) H₃PO₄

c) HCl

d) PCl₃

2. What is the range of the oxidation states shown by phosphorus in its oxoacids?

a) +1 to +3

b) +2 to +4

c) +1 to +2

d) +1 to +5

5. How many P-H bonds does hypophosphorous acid contain?

a) 1

b) 2

c) 3

d) 4

6. What is the basicity of pyrophosphoric acid?

a) Monobasic

b) Tribasic

c) Dibasic

d) Tetrabasic

10. Which of the following compounds contain phosphorus with an oxidation state of +5?

a) Peroxodiphosphoric acid

b) Hypophosphorous acid

c) Orthophosphorous acid

d) Hypophosphoric acid

9. What is the temperature at which orthophosphoric acid forms pyrophosphoric acid?

a) 673 K

b) 523 K

c) 423 K

d) 700 K

1. Phosphorus does not form oxoacids.

a) True

b) False

1. Group 16 elements are also called Chalcogens.

a) True

b) False

3. Which is the most abundant group 16 element?

a) Oxygen

b) Sulphur

c) Selenium

d) Tellurium

5. What is the general outer electronic configuration of the Oxygen family?

a) ns²np⁴

b) ns²np³

c) ns²np⁵

d) ns²np²

7. Which group 16 element is the most electronegative?

a) Sulphur

b) Polonium

c) Oxygen

d) Selenium

11. Which group 16 element has 8 allotropic forms?

a) Sulphur

b) Oxygen

c) Selenium

d) Polonium

1. Which of the following is the most abundant non-metal in the Earth’s crust?

a) Oxygen

b) Silicon

c) Hydrogen

d) Water

6. Which of the following in air, forms compounds readily?

a) Nitrogen

b) Oxygen

c) Sulfur

d) Carbon

10. What happens when an atom of oxygen is subjected to external magnetic field?

a) It is weakly attracted and loses magnetism on removal of field

b) It is weakly attracted and does not lose magnetism on removal of field

c) It is weakly attracted and domains align themselves in the direction of field

d) It is not attracted

7. What will be the products of the reaction – C₂H₄ + 2O₂ →?

a) CO and H₂O

b) CO₂ and H₂O₂

c) Co and H₂O

d) CO₂ and H₂O

5. Marine life is more comfortable in warm water than cold water. True or false?a) Trueb) False

1. What type of oxides is formed by metals?

a) Oxides with pH = 7

b) Oxides with pH > -log₁₀[1 x 10^-7]

c) Oxides with pH <= -log₁₀[1 x 10^-7]

d) Amphoteric oxides

3. Which of the following can classified as an amphoteric oxide?

a) Iron (III) oxide

b) Zinc oxide

c) Mercury (II) oxide

d) Lime

5. What is the primary constituent of sand?

a) Silicon tetroxide

b) Silica

c) Silicon

d) Feldspar

8. Which of the following processes involves heating a carbonate ore to form metal oxide?

a) Leaching

b) Smelting

c) Ore Reduction

d) Calcination

9. Which of the following metals does not react with hot water to form an oxide?

a) Calcium

b) Magnesium

c) Iron

d) Lithium

. What is the chemical formula structure of ozone?

a) O = O⁺ – O^–

b) O^– – O = O⁺

c) O = O^– – O⁺

d) O^– = O⁺ – O

5. Why is ozone a powerful bleaching agent?

a) It is highly electronegative

b) Nascent oxygen

c) Instability of molecule

d) Large negative Gibbs energy

4. As ozone transitions from solid to liquid to gas, what is the notable color change?

a) Pale blue to violet to deep blue

b) Violet to pale blue to deep blue

c) Deep blue to violet to pale blue

d) Violet to deep blue to pale blue

3. Which of the following methods is used to form ozone from oxygen?

a) Standard electric discharge

b) Silent electric discharge

c) Thermal decomposition

d) Heating in an atmosphere of excess oxygen

2. “Ozone is a pollutant.” True or false?

5. What is the primary product of Haber-Bosch process?

a) Ammonia

b) Nitric acid

c) Nitrous acid

d) Pyridine

9. What catalyst is used for oxidation of ammonia to produce nitric acid?

a) Palladium hydride

b) Sodium amalgam

c) Platinum-Rhodium gauze

d) Vanadium (V) oxide

4. Phosphorus trichloride does not react with Grignard reagents.

9. Which of the following is not formed on hydrolysis of PCl₅?

a) POCl₃

b) H₃PO₄

c) HCl

d) PCl₃