HelpContactFor teachers and institutes
>_StemPy Lab
Mock TestsClassesGroups

>_StemPy Lab

Learn. Solve. Code the solutions. Test yourself.

Live examsFree mock exams, timed and rankedEveryone starts together, and your score and rank come the moment it ends.See the exams →

Learn

  • Physics
  • Chemistry
  • Mathematics
  • Biology
  • Python Programming
  • Statistics & Data Science
  • Classes
  • Groups

Practice

  • Problems
  • Quizzes
  • Mock Tests
  • Prepare for an Exam
  • Question Sets
  • Exams
  • Certificates
  • Python Labs
  • AI Practice Generator
  • Student-Created Tests

Community

  • Discussions
  • Resources
  • Notes
  • Blog

Account

  • Dashboard
  • My Content
  • Profile
  • Log in
© 2026 senLearn. All rights reserved.HelpAboutContactPrivacy PolicyTerms of UseRefund Policy

Quizzes

Quick multiple-choice questions shared by teachers and students.

+ Create a Quiz

Pick a subject to see its topics.

Exam:
1820 quizzes
A cricket ball of 0.15 kg moves at 20 m/s. What is its de Broglie wavelength? Take h = 6.63 × 10⁻³⁴ J s.
High School (11–12) · Dual Nature of Radiation and Matter
Board Exam, AP, A-Level, IB
StemPy LabStemPy Lab
Medium
Which pair is the main buffer that keeps the pH of human blood steady? New
High School (11–12) · Buffers, Salt Hydrolysis and Solubility Product
A-Level, AP, IB
StemPy LabStemPy Lab
Easy
Tara pays ₹600000 for a delivery van. Its resale price drops by 15% of the current price every twelve months. What is the van worth two years after purchase? New
High School (11–12) · Sequences and Series
A-Level, IB
StemPy LabStemPy Lab
Medium
A centrosome has two centrioles. How many microtubules are there in the peripheral fibrils of the two together? New
High School (11–12) · Cell Structure and Organelles
A-Level, AP, IB
StemPy LabStemPy Lab
Medium
A bug hides somewhere in 64 lines. About how many checks does bisection need to find its line?
High School (11–12), High School (9–10), Undergraduate, General · Testing and Debugging
AP, A-Level, IB
StemPy LabStemPy Lab
Medium
In the hill town, the 3 snowy days had a mean highest temperature of 8.7 °C, and the other 17 days 12.5 °C. What may a report say?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode
AP, IB
StemPy LabStemPy Lab
Medium
According to Bohr, what is the angular momentum of the electron in the nth orbit?
High School (11–12) · Atoms and Atomic Spectra
Board Exam, IB
StemPy LabStemPy Lab
Easy
Calcium carbonate has Ksp = 3.3 × 10⁻⁹. Hard water has [Ca²⁺] = 2.0 × 10⁻⁴ mol/L and [CO₃²⁻] = 3.0 × 10⁻⁵ mol/L. What happens? New
High School (11–12) · Buffers, Salt Hydrolysis and Solubility Product
A-Level, AP, IB
StemPy LabStemPy Lab
Medium
For two positive numbers a and b with arithmetic mean A and geometric mean G, which statement is always true? New
High School (11–12) · Sequences and Series
A-Level, IB
StemPy LabStemPy Lab
Easy
A small knob at the end of some chromosomes lies beyond a constriction that does not stain. What is the knob called? New
High School (11–12) · Cell Structure and Organelles
A-Level, AP, IB
StemPy LabStemPy Lab
Hard
add(a, b) has a bug: it returns a - b. Which test would let the bug slip through?
High School (11–12), High School (9–10), Undergraduate, General · Testing and Debugging
A-Level, IB
StemPy LabStemPy Lab
Medium
The chance of a snowy day is 0.15. If each day's weather did not depend on the day before, what would be the chance of two snowy days in a row?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode
AP, IB
StemPy LabStemPy Lab
Hard
A hydrogen lamp glows violet at one Balmer line, made by jumps from n = 5 down to n = 2. Taking hc = 1240 eV nm, what is its wavelength?
High School (11–12) · Atoms and Atomic Spectra
Board Exam, AP, A-Level, IB
StemPy LabStemPy Lab
Medium
Arjun adds a few crystals of common salt to a clear, saturated solution of silver chloride. What does he see? New
High School (11–12) · Buffers, Salt Hydrolysis and Solubility Product
A-Level, AP, IB
StemPy LabStemPy Lab
Easy
Two positive numbers have arithmetic mean 25 and geometric mean 20. What are they? New
High School (11–12) · Sequences and Series
A-Level, IB
StemPy LabStemPy Lab
Medium
In which part of the nucleus is ribosomal RNA made in large amounts? New
High School (11–12) · Cell Structure and Organelles
A-Level, AP, IB
StemPy LabStemPy Lab
Easy
A linked list has 6 nodes. How many next links does a walk from the head follow to reach node 6?
High School (11–12), High School (9–10), Undergraduate, General · Data Structures
A-Level, IB
StemPy LabStemPy Lab
Medium
A drawer has 3 black and 5 white socks. Two socks are taken without looking, and the first is not put back. What is the probability that both are black?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Probability and Chance
AP, IB
StemPy LabStemPy Lab
Hard
A student says: Closing one end of an open pipe doubles its fundamental frequency. What is wrong?
High School (11–12) · Superposition and Standing Waves
Board Exam, AP, A-Level, IB
StemPy LabStemPy Lab
Medium
Magnesium hydroxide, of the type AB₂, dissolves to 2.0 × 10⁻⁴ mol/L in a sample of water. What is its Ksp? New
High School (11–12) · Buffers, Salt Hydrolysis and Solubility Product
A-Level, AP, IB
StemPy LabStemPy Lab
Medium
Which fraction equals the recurring decimal 0.63 = 0.636363…? New
High School (11–12) · Sequences and Series
A-Level, IB
StemPy LabStemPy Lab
Medium
The two arms of a chromosome are of very different lengths, one of them tiny. What kind of chromosome is it? New
High School (11–12) · Cell Structure and Organelles
A-Level, AP, IB
StemPy LabStemPy Lab
Medium
5, 2 and 8 are inserted into an empty binary search tree. Where is 8?
High School (11–12), High School (9–10), Undergraduate, General · Data Structures
A-Level, IB
StemPy LabStemPy Lab
Easy
Kiran flips a coin four times for a game. If the coin is fair, how likely is she to see tails at least once?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Probability and Chance
AP, IB
StemPy LabStemPy Lab
Hard
A string vibrates with 4 loops at 360 Hz. What is its fundamental frequency?
High School (11–12) · Superposition and Standing Waves
Board Exam, AP, A-Level, IB
StemPy LabStemPy Lab
Medium
Page 1 of 73
…

Showing 1–25 of 1820