JEE Main, NEET MCQs Set 11

Sr. No.

Question

Answer

1.

Identify the ore not containing iron

(A) chalcopyrites

(B) carnallite

(C) siderite

(D) limonite

Answer: (B)

2.

Identify the reaction that does not take place in a blast furnace.

(A) CaCO₃ → CaO + CO₂

(B) CaO + Si O₂ → Ca Si O₂ → Ca Si O₃

(C) 2Fe₂O₃ + 3C → 4Fe + 3CO₂

(D) CO₂ + C → 2CO

Answer: (C)

3.

If n = 6, the correct sequence of filling of electrons will be

(A) ns → np(n – 1)d → (n – 2)f

(B) ns → n(n – 2)f → (n – 1)d → np

(C) ns → (n – 1)d → (n – 2)f → np

(D) ns → (n – 2)f → np → (n – 1)d

Answer: (B)

4.

If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas, then

(A) ΔH > Δu

(B) ΔH = Δu

(C) ΔH < Δu

(D) there is no relationship

Answer: (C)

5.

If the  for a given reaction has a negative value, then which of the following gives the correct relationships for the values of ΔG° and K_eq?

(A) ΔG^o > 0; K_eq < 1

(B) ΔG^o > 0; K_eq > 1

(C) ΔG^o < 0; K_eq > 1

(D) ΔG^o < 0; K_eq < 1

Answer: (A)

6.

If the enthalpy change for the transition of liquid water to steam is 30 kJ mol^–1 at 27°C, the entropy change for the process would be

(A) 100 J mol^–1 K^–1

(B) 10 J mol^–1 K^–1

(C) 1.0 J mol^–1 K^–1

(D) 0.1 J mol^–1 K^–1

Answer: (A)

7.

If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process?

(A) = P × T

(B)  = f(p) at constant T

(C)  = f(T) at constant p

(D) p = f(T) at constant

Answer: (A)

8.

In acetylene molecule, between the carbon atoms there are

(A) three sigma bonds

(B) two sigma and one pi bonds

(C) one sigma and two pi bonds

(D) three pi bonds

Answer: (C)

9.

In alkaline medium, alanine exists predominantly as/in ______.

(A) zwitterion

(B) anion

(C) covalent form

(D) cation

Answer: (B)

10.

In chromite ore, the oxidation number of iron and chromium are respectively ______.

(A) +3, +6

(B) +3, +2

(C) +2, +3

(D) +2, +6

Answer: (C)