Plus 2 Lecturer Mixed Practice Test #328

Question 1

An unknown element 'M' exhibits the following characteristic properties: it readily forms compounds with variable oxidation states, its ions often produce intensely coloured solutions in water, and it is frequently employed as a catalyst in various chemical reactions. Based on these observations, to which block of the modern periodic table does element 'M' most likely belong?

Accepted Answer

C. d-block — The described properties—variable oxidation states, formation of intensely coloured ions, and catalytic activity—are hallmarks of transition metals. Transition metals occupy the d-block of the periodic table, where their partially filled d-orbitals allow for these characteristics. s-block elements typically have fixed oxidation states and form colourless ions, while p-block and f-block elements do not consistently exhibit this specific combination of properties to the same extent as d-block elements.

Answer

A. s-block

Answer

B. p-block

Answer

D. f-block

Question 2

The Intergovernmental Panel on Climate Change (IPCC) plays a crucial role in informing global climate policy. Which of the following best describes the core mandate of the IPCC?

Accepted Answer

C. To assess the scientific, technical, and socio-economic information relevant to understanding climate change. — The IPCC's core mandate is to assess, not conduct, original scientific research. It synthesizes existing scientific literature to provide comprehensive assessments of climate change and its impacts. Negotiation of treaties is the role of bodies like UNFCCC, and project implementation is typically done by national governments or specific agencies.

Answer

A. To conduct original scientific research on climate change and develop new climate models.

Answer

B. To negotiate international treaties and protocols for reducing greenhouse gas emissions.

Answer

D. To implement climate adaptation and mitigation projects in developing countries.

Question 3

Photovoltaic (solar) cells are typically made of:‌​‍

Accepted Answer

Silicon (doped) — Most commercial PV cells use crystalline silicon; thin-film variants use CdTe, CIGS, perovskite etc.‌​‍

Answer

Germanium

Answer

Carbon

Answer

Copper

Question 4

Synonym of 'disposition':‌​‍

Accepted Answer

Character — Disposition = a person's inherent nature / character.‌​‍

Answer

Position

Answer

Disagreement

Answer

Status

Question 5

Antiparticle of electron:

Accepted Answer

Positron (same mass, +e charge) — Predicted by Dirac (1928), discovered by Anderson (1932, cosmic rays). Used in PET scans.

Answer

Proton

Answer

Neutron

Answer

Neutrino

Question 6

'Sadhu Jana Paripalana Sangham' was founded by:‌​‍

Accepted Answer

Ayyankali — Ayyankali founded SJPS in 1907 for Dalit upliftment in Travancore.‌​‍

Answer

A.K. Gopalan

Answer

Sree Narayana Guru

Answer

Vakkom Maulavi

Question 7

Pulmonary vein carries:

Accepted Answer

Oxygenated blood — Oxygenated blood from lungs to heart.

Answer

Deoxygenated blood

Answer

Mixed

Answer

Nothing

Question 8

QUAD members:‌​‍

Accepted Answer

India, USA, Australia, Japan — India, USA, Australia, Japan — strategic security dialogue.‌​‍

Answer

India, USA, UK, Japan

Answer

India, USA, France, Japan

Answer

India, USA, Australia, UK

Question 9

The scientific study of living organisms is called:

Accepted Answer

Biology — Biology (Greek bios=life, logos=study) — the science of life.

Answer

Geology

Answer

Psychology

Answer

Sociology

Question 10

The first Indian woman in space was:‌​‍

Accepted Answer

Kalpana Chawla — Kalpana Chawla (1997, Columbia mission). ‌​‍She was of Indian origin but US citizen.

Answer

Sunita Williams

Answer

Tessy Thomas

Answer

Ritu Karidhal

Plus 2 Lecturer Mixed Practice Test #328