Base Of Chemistry

Question 1

3 points required to be a matter

Answer 1

Occupy space, have mass, can b sensed

Question 2

What are the two types of smell

Answer 2

Odour, fragrance

Question 3

Which G/g is “acceleration is due to gravity”

Answer 3

Small “g”

Question 4

Name the ability which is the ability to maintain its shape without deforming…..with other name with example

Answer 4

Rigidity…. stiffness or resistance,,, adanemt. Eg, glass, plastic

Question 5

The ability in which an object breaks into pieces when force is applied. With eg

Answer 5

Brittle. Eg, glass

Question 6

The ability opposite to brittle is called

Answer 6

Strong

Question 7

What is strong

Answer 7

The resistance against permanent deformation

Question 8

What is hardness

Answer 8

The ability to resist scratches

Question 9

What is a physical quantity

Answer 9

Magnitude X unit…….it’s a variable but unit is fixed

Question 10

How many base quantities and Si base units are there

Answer 10

7

Question 11

What are the seven base quantities

Answer 11

Length l, mass m, time t, electric current I, thermodynamics temperature T, amount of substance n, luminous intensity lv

Question 12

How many Si derived units are there

Answer 12

22

Question 13

What is the SI unit of mass

Answer 13

Kilogram

Question 14

What is the full form of NIST

Answer 14

National Institute of Standard and Technology

Question 15

Who and when coined the name atomos and what does it mean

Answer 15

Democritus 400bc, unbreakable

Question 16

Which teacher gave the name atom

Answer 16

Jhon Delton

Question 17

Name 3 atomic model

Answer 17

Bohr’s atomic model, Rutherford atomic model, quantam amechanical model

Question 18

1st atomic model and who proposed

Answer 18

J.J. Thomson, plum pudding model

Question 19

Mass of electron proton neutron

Answer 19

9.1×10-³¹ ….., 1.67×10-²⁷kg

Question 20

How are the shells of atom are named

Answer 20

K L M N O P

Question 21

What’s the formula of number of electrons in a shell

Answer 21

2n²

Question 22

Who coined the name element

Answer 22

Robert Boyle

Question 23

Who is known as the father of modern Chemistry

Answer 23

Antoine Laurent Lavoisier

Question 24

Cancel

Answer 24

Cancel

Question 25

Two types of atomic element

Answer 25

Monoatomic, polyatomic.

Question 26

Molecule means

Answer 26

Chemical species containing 2 or more atoms chemically bonded to each other

Question 27

What are the two types of ions

Answer 27

Cations+, anion -

Question 28

Classify cations on the basis of charge

Answer 28

Monovalent cations, divalent, trivalent,

Question 29

Which kind of valency does copper contain

Answer 29

Variable valency

Question 30

Classify ions on the basis of number of atoms

Answer 30

Monoatomic ions and polyatomic ions