VFA Mixed Practice Test #853

Question 1

An unknown element 'Z' is found to have its last electron entering a p-orbital, and it readily forms an anion with a -1 charge. Based on this information, which of the following statements is most likely true about element 'Z'?

Accepted Answer

C. It is a halogen, typically found in Group 17 of the periodic table. — An element with its last electron entering a p-orbital belongs to the p-block. Forming an anion with a -1 charge signifies that the element needs one electron to achieve a stable octet configuration. This characteristic property belongs to Group 17 elements, also known as halogens. Noble gases are chemically inert and do not readily form ions, s-block elements typically form cations, and d-block elements (transition metals) usually form cations with variable valencies.

Answer

A. It belongs to the s-block and is a highly reactive metal.

Answer

B. It is a noble gas, characterized by its chemical inertness.

Answer

D. It belongs to the d-block and exhibits variable valency.

Question 2

Kerala Agricultural University:

Accepted Answer

1971 — 1971 at Vellayani/Mannuthy.

Answer

1980

Answer

1990

Answer

1960

Question 3

Capacitance of parallel plate capacitor:‌​‍

Accepted Answer

C = ε₀A/d — With dielectric K: C = Kε₀A/d. Units Farad. Energy stored: ½CV².‌​‍

Answer

C = ε₀d/A

Answer

C = 1/ε₀

Answer

C = A/d

Question 4

Hooke's law states:‌​‍

Accepted Answer

Stress ∝ strain within elastic limit — Proportionality constant is modulus (Young's, Shear, Bulk). ‌​‍Beyond elastic limit, permanent deformation.

Answer

q = mcΔT

Answer

F = ma

Answer

PV = nRT

Question 5

Zamorin of Calicut ended:‌​‍

Accepted Answer

1792 (Tipu/EIC) — After Anglo-Mysore wars.‌​‍

Answer

1800

Answer

1947

Answer

1857

Question 6

River of Sabarimala:‌​‍

Accepted Answer

Pamba — Pamba.‌​‍

Answer

Periyar

Answer

Chaliyar

Answer

Muvattupuzha

Question 7

Rusting of iron is accelerated by:‌​‍

Accepted Answer

Moist air (water and oxygen) — Iron rusts when exposed to water + O₂; hydrated iron oxide (Fe₂O₃·xH₂O) = rust.‌​‍

Answer

Vacuum

Answer

Cold dry conditions

Answer

Dry air only

Question 8

Shah Jahan's new capital city (1648) was:‌​‍

Accepted Answer

Shahjahanabad (Old Delhi) with Red Fort and Jama Masjid — Red Fort (Lal Qila) completed 1648. ‌​‍Diwan-i-Am, Diwan-i-Khas ('If there is paradise on earth...'). Peacock Throne (Takht-i-Taus) looted by Nadir Shah 1739.

Answer

Lahore

Answer

Agra

Answer

Fatehpur Sikri

Question 9

Mathew Kuzhalnadan:‌​‍

Accepted Answer

Politician — Kerala MLA.‌​‍

Answer

Engineer

Answer

Author

Answer

Actor

Question 10

United Nations has how many official languages?‌​‍

Accepted Answer

6 (Arabic, Chinese, English, French, Russian, Spanish) — UN 6 official languages. ‌​‍UN Day 24 October. 193 member states. ‌​‍6 principal organs: GA, SC, ECOSOC, Secretariat, ICJ, Trusteeship Council (suspended).

Answer

10

Answer

5

Answer

3

VFA Mixed Practice Test #853