NEET 2016 Phase 2 | Atoms and Nuclei Question 36 | Physics

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

Out of Syllabus

The half-life of a radioactive substance is 30 minutes. The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

When an $$\alpha $$-particle of mass m moving with velocity v bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as

$${1 \over {{m^2}}}$$

$${1 \over m}$$

$${1 \over {\sqrt m }}$$

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

Given the value of Rydberg constant is 10⁷ m^$$-$$1, the wave number of the last line of the Balmer series in hydrogen spectrum will be

0.25 $$ \times $$ 10⁷ m^$$-$$1

2.5 $$ \times $$ 10⁷ m^$$-$$1

0.025 $$ \times $$ 10⁴ m^$$-$$1

0.5 $$ \times $$ 10⁷ m^$$-$$1

AIPMT 2015

MCQ (Single Correct Answer)

-1

In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is

$${{27} \over 5}$$

$${5 \over {27}}$$

$${4 \over 9}$$

$${9 \over 4}$$

PREVIOUS NEXT

NEET Subjects

Biology

Botany

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution