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Correct option (2) MgCO₃ < CaCO₃ < SrCO₃ < BaCO₃  

Explanation:

In 2^nd group carbonates thermal stability increases down the group due to increase in lattice energy.

(c) (ii) and (iii) 

Correct option is (d) (i) and (iv)

Correct option is (1) ~(p → q)

(p ∧ ~ q ) ∧ (p ∨ ~ q)

= (p ∧ ~ q)

=  ~(p → q)

Correct option is (3) P³⁺

Calcium and phosphate are the major component of hydroxyapatite crystal that form the inorganic portion of the teeth.

(b) varies inversely as the absolute pressure 

Pressure, p = 200 bar 

Temperature, T = ? 

For CO₂  p_c = 73.86 bar 

T_c = 304.2 K 

As the gas behaves like an ideal gas, Z = 1

p_r = \(\cfrac{p}{p_c}\) = \(\cfrac{200}{73.86}\) = 2.7

From compressibility chart for Z = 1, p_r = 2.7 

T_r = 2.48 

∴ T = T_r × T_c = 2.48 × 304.2 = 754.4 K.

(c) the temperature of the gas 

(c) pressure, volume and temperature 

Correct option is (b) pv = RT 

(a) c_p = a + KT + K₁T² + K₂T³ 

(b) \(\left(p+\cfrac{a}{v^2}\right)\)(v – b) = RT

(i) 2-Pentanone 

(ii) 3-Methyl-1-pentanal

(b) 4-penten-2-yn-1-ol

1. It is the isomerism which arises due to different alkyl chains on either side of the functional group in the molecule.

e.g. Methoxy propane(CH₃OC₃H₇) and ethoxyethane (C₂H₅OC₂H₅) are metamers.

2. Free radicals are highly reactive species containing unpaired electrons. They are formed by homolytic cleavage of covalent bond.

e.g. H₃

Correct answer is (C) Assertion (A) is true, but Reason (R) is false.

Silver salt (AgCl) are used in black and white photography. silver salt (AgCl) is photo sensitive compound, it decomposes into elemental chlorine (Cl₂) and Ag(metal).

AgBr is also used as black and white photography.

2AgCl \(\overset{h\lambda}{\longrightarrow}\) 2Ag + Cl₂

Answer: (D)

∙ Option A  Diffusion is a process in which what is random movement of the molecules from origin of their concentration to a region of lower concentration.

∙ Option B Pressure flow is a hypothesis based on which the translocation mechanism of the phloem is explained. This is also known as mass flow hypothesis. According to this theory the water containing food molecules flows under pressure through the phloem.

∙ Option C  Translocation is the movement of sucrose and other food substances around the plant. It helps in delivering nutrients to all the parts of the plants.

∙ Option D Active transport is the process in which the molecules can move against the concentration gradient as well. This transport process helps the mineral to enter into the plant. The plants take up the mineral ions you are and move them afterwards where the concentration is higher as compared to the concentration in the soil.

Bauxite is treated with hot concentrated NaOH. Aluminum oxide reacts with NaOH solution forming sodium aluminate solution (NaAlO₂). The unreacted impurities are removed from the solution. To the remaining solution of sodium aluminate, add Al(OH)₃ in small quantity and dilute with water. Then the whole aluminum in the solution gets precipitated as Al(OH)₃ . The Al(OH)₃ precipitated is separated from the solution. Then it is washed and heated strongly. Then Al(OH)₃ decomposes to give pure AL₂O₃ or alumina.

2Al(OH)_3(s) → Al₂O_3(s) + 3H₂O(1).

a. Blast Furnace 

b. Mixture of roasted haematite, coke and limestone. 

c. At the bottom of the blast furnace, coke combines with oxygen in the hot current of air. The CO₂ which rises up along with the hot air current is reduced by coke. 

d. CaCO₃ in the furnace decomposes to form CaO and CO₂ . CaO which is basic combines with SiO₂ (acidic) to form slag. Molten slag which is lighter floats over the heavier molten iron. CaCO₃ is added to the furnace for the production of slag. 

e. Acidic 

f. Slag. (CaSiO₃) used for the production of cement and in the Construction of Road. 

g. Carbon monoxide 

h. CaCO₃ (s) → CaO + CO₂ 

CaO + SiO₂ → CaSiO₃ 

C + O₂ CO₂ + Heat 

CO₂ (g) + C_(s)  + Heat → 2CO (g) 

Fe₂O₃ +3CO → 2Fe + 3CO₂

i. Pig iron 

j. Different types of steel can be prepared by varying the amount of carbon from 0.1 to 1.5 

k. Mild steel, Medium steel, High carbon steel

Mild steel:- 

If the carbon content in steel is from 0.05% to 0.2 % then it in called mild steel. I 

Medium steel :- 

Medium steel contains carbon from 0.2 % to 0.6 % medium steel

High carbon steel: – 

If the content of carbon is from 0.61 % to 15 % then it is known as high carbon steel.

Anode – Copper to be refined 

Cathode – Pure Copper 

Electrolyte – Aqueous Copper Sulphate Solution mixed with H₂SO₄ 

b. Anode – Cu → Cu₂ + 2e^- 

Cathode – Cu²⁺ +2e^- → Cu

i. 3 – Methylhexane 

ii. Pent – 2 – ene

a. Haematite 

b. SiO₂ 

c. CaO 

d. slag(CaSiO₃) 

e. Carbon monoxide 

f. A mixture of roasted haematite, coke and limestone.

b. The general formula is CnH2n 

c. It’s an alkene 

e. Similar with the molecular formula of cyclohexane.  

f. IUPAC name hex – 2 ene.

1. -OH,CH₃-O-

2. C₂H₆O

3. Yes. They show functional isomerism

a. Hex-3-yne 

b. CH₃ – C = C – CH₂ – CH₂ – CH₃ 

CH₃ – CH₂ – C = C – CH₂ – CH₃

a. i. Methoxy ethane ii. Propan – l – ol 

b. Similarity: Molecular formula is same Difference: Functional group is different 

c. Functional group isomerism.

a. i. Obtained from Blast Furnace Contains 4% Carbon and other impurities like manganese silicon, phosphorus, etc. 

ii. Pig iron mixed with scrap iron and coke melted in a special furnace contains 3% carbon.

iii. Made by purifying cast Iron. 

iv. Prepared by varying the amount of carbon from 0.1 to 1.5%. 

b. Stainless steel and Nichrome are having the same content but the nature of both alloys are different because ratio of constituent elements are different.

c. A mineral from which a metal is economically, easily and quickly extracted is called the core of the metal. Among the minerals of aluminum, bauxite possesses these properties. Hence bauxite is the ore of Aluminium. Since clay does not possess these properties it is not an ore of Aluminium.

(1) Both Statement-l & Statement-ll are true 

Due to small size & high electronegativity F can not act as central atom in higher oxidation state so F form only one oxy acid HOF.

(a) Both assertion and reason are true, reason is correct explanation of assertion.

Due to high electronegativity and small size, fluorine forms only one oxoacid, HOF known as fluoric (I) acid or hypofluorous acid.

Correct answer is (B) 3