What is the atomic mass unit (amu) equivalent to in kg?

The correct answer is A: 1.66 × 10⁻²⁷ kg. 1 amu = 1.66054 × 10⁻²⁷ kg. This is used to express atomic and molecular masses.

In the light-dependent reactions, where exactly does the photolysis of water occur?

The correct answer is B: Thylakoid membrane (lumen side). Water photolysis occurs in the thylakoid lumen as part of Photosystem II, releasing O2, H+, and electrons that drive the electron transport chain.

A copper wire is stretched elastically. Which property is NOT affected?

The correct answer is A: Young's modulus. Young's modulus is a material property independent of the wire's dimensions or elastic deformation state. It depends only on the material composition and atomic structure, not on physical changes.

A ball is thrown upward with initial velocity 20 m/s. Taking g = 10 m/s², what is the maximum height reached?

The correct answer is C: 20 m. Using v² = u² - 2gh, where final velocity v = 0 at maximum height: 0 = (20)² - 2(10)h, so h = 400/20 = 20 m.

Government Jobs Exam Preparation — SSC, UPSC, Bank, Railway

Choose Govt Exam

UPSC IAS / IPS SSC CGL / CHSL Bank PO / Clerk Railway RRB / NTPC NDA / CDS / AFCAT General Knowledge Quantitative Aptitude Logical Reasoning English Language History & Polity General Science Current Affairs

All Physics Chemistry Biology Botany Zoology Human Body Disease & Health Space & Astronomy

All Easy Medium Hard

Govt Exam — General Science — Chemistry

SSC · UPSC · Bank PO · Railway · NDA — Government Exam MCQ Practice

5 Questions 10 Topics Take Test

Showing 1–5 of 5 questions in Chemistry

Q.1 Easy Chemistry

Which of the following elements has the highest electronegativity value on the Pauling scale?

A Fluorine

B Oxygen

C Chlorine

D Nitrogen

Correct Answer: A. Fluorine

Explanation:

Fluorine has the highest electronegativity value of 3.98 on the Pauling scale, making it the most electronegative element.

This is because it has the smallest atomic radius and the highest effective nuclear charge among all elements, causing it to attract electrons most strongly in a chemical bond.

Take Test

Q.2 Easy Chemistry

Chemical formula of water?

A HO

B H2O

C H2O2

D HO2

Correct Answer: B. H2O

Explanation:

Water = H₂O.

Take Test

Q.3 Easy Chemistry