Contribute & Test Your Skills
- Some Basic Concepts in Chemistry
- States of Matter
- Atomic Structure
- Chemical Bonding & Molecular Structure
- Chemical Thermodynamics
- Solutions
- Equilibrium
- Redox Reactions & Electrochemistry
- Chemical Kinetics
- Surface Chemistry
- Purification & Characterisation of Organic Compounds
- Hydrocarbons
- Chemistry in Everyday Life
- Principles Related to Practical Chemistry
- Organic Compounds Containing Halogens
- Organic Compounds Containing Oxygen
- Organic Compounds Containing Nitrogen
- Alcohol, phenol & Ether
- Organic Chemistry Principles
- Biomolecules & Polymers
- Classification of Elements & Periodicity in Properties
- Hydrogen
- S & P block Element
- D & F - Block Elements
- Co-Ordination Compounds
- Environmental Chemistry
- General Principles & Processes of Isolation of Metals
- JEE Chemistry Discussions
- Aldehydes, Ketones & Carboxylic Acid
- Nuclear Chemistry
- Atom & Molecules
- Redox Reaction
- Aromatic Hydrocarbons
- Halogen Derivatives
- Carboxylic Acids & Derivatives
- Nitrogen Containing Compounds
- Bio Molecules
- Chemistry In Action
- Extraction of Metals
- Chemical Analysis
- Ores, Minerals and Metallurgical Extraction
Popular Questions
- A radioactive isotope has a-life of 10 yr. What percentage of the original amount of it ramain after 20 yr?
- Which of the following nuclear transformation is (n, p) type
- If the mass defect of 5B^11 is 0.081 u, its average binding energy (in MeV) is
- The half-life of ^14C is 5570 yr. How many years will it take for 90 per of a sample to decompose?
- Positron has nearly the same weight as that of
- What is the fuel of atomic pile ?
- The positron is
- What is x in the following nuclear reaction
- Hydrogen and deuterium differ in
- Aradioactive substance 88 X ^228 (IIA) emits 3 a and 3 B particles to form Y . To which group of long form of the periodic table d..
- Which of the following has the maximum penetrating power ?
- If an isotope of hydrogen has two neutrons in its atom
- Which one of the following statements is not correct?
- Which of the following has magic number of neutrons?
- Which of the following is n, p reaction
- In successive emission of a and B-particles, the number of α and β-particles should be emitted for the conversion of 92 U ^2..
- What is the correct order of velocity of alpha (a ), beta (B) and gamma (Y) rays ?
- In the nuclear reaction 12mg24 + 2He2 = 0n1 + ? the product nuclues is
- Highest ionising power is exhibited by
- If half-life period is 100 yr, average life is nearly
- Decrease in atomic number is not observed during
- Electrical field is used to deflect
- In terms of energy 1 u is equal to
- The cause of instability of nucleus is
- Gamma rays have
- Nuclides
- Loss of a beta particle is equivalent to
- The energy released in an atom bomb explosion is mainly due to
- Penetrating power of waves are
- Uranium with a mass number 237 and atomic number 92, changes to a nucleus with atomic number 90 and mass number 233 on emission of
