1.
The existence of isotopes was first suggested in 1913 by the radiochemist .........
2.
The mass of an electron is nearly one upon _______ times that of a proton.
3.
Chemical properties of isotopes ............ ?
4.
Atoms of different elements with different atomic numbers, having same mass number is known as ––––.
5.
Name the law in Physics which states that equal volume of all gases under the same conditions of temperature and pressure contain equal number of molecules.
6.
Mass of a hydrogen atom is how many times the mass of an electron?
7.
The existence of isotopes was first suggested in 1913 by the radiochemist .........?
8.
The process of change from liquid to gas is called _____ ?
9.
How many protons are found in nucleus of Lithium?
10.
A drop of food colouring spreading out in a cup of water is an example of:
11.
Neutrons are present in the nucleus of all atoms EXCEPT in those of _____.
12.
Which of the following is NOT advisable as a process of separation of components of a mixture?
13.
Which one of the following features is not shown by metals?
14.
Which among the following is false about alpha particles?
15.
The antiparticle of an electron is ?
16.
The first electron shell which is the nearest to the nucleus never holds more than 'n' electrons, where 'n' is equal to:
17.
In 1808 which of the following proposed that the combination of two or more different elements form compounds?
18.
In the context of isotopes of any element, which of the following statements is not correct?
19.
What is the mass of 4 Moles of aluminium atoms?
20.
How many types of isotopes does Scandium have?
21.
Which one of the following is not a compound?
22.
The number of protons in a Lithium nucleus is:
23.
Electron was discovered in the year 1897 by___
24.
The process of transformation of a substance in a gaseous state into a liquid state due to change in pressure or temperature of the substance is called :
25.
What is the atomic mass of oxygen (Which is represented in 'u')?
26.
Atoms of same element having different mass numbers are called…………. ?
27.
What is the process called when the heavier component settles down after adding water to the mixture?
28.
Which of the following process changes liquids directly into gases (vapour)?
29.
Which of the following is NOT a chemical change?
30.
Which of the following particles were made to fall on a thin gold foil by Ernest Rutherford?
31.
Alpha particles are………. ?
32.
How many protons are there in a lithium nucleus?
33.
The general electronic configuration ns2 np3 fits which of the following elements?
34.
Which of the following is used to determine molecular weight of fatly acids.
35.
Which of the following can be defined as the smallest particle of an element that is capable of an independent existence?
36.
What is approximate value of atomic mass of hydrogen?
37.
Which of the following scientists discovered the electron in 1897?
38.
Which of the following statement is not correct with respect to a mixture?
39.
What happens when one s and one p orbital is hybridized?
40.
Using which of the following processes can one separate a solute from its solution?
41.
How many maximum electrons can be present in third or m-subs heel?
42.
Protium, deuterium and tritium are the naturally occurring isotopes of:
43.
Which of the following pair of number composition is/are correct?
Atomic Number – Number of Proton
II. Mass number – Sum of numbers of neutron
and proton
44.
What is the atomic number of chromium?
45.
Which of the following is a chemical change?
46.
Which among the following is NOT true about a solution and the solute concerned?
47.
Fe has 26 protons in its nucleus. What is the number of electrons in Fe²⁺ (iron II) ion?
48.
Who discovered the neutron and its properties?
49.
What is the elemental percentage composition of H₂SO₃?
50.
Cathode rays are a ray of ____.
