[PDF] Chemistry Free eBooks | Study Material | Practice sets

[PDF] Chemistry Free eBooks | Study Material | Practice sets

Latest Science Chemistry important notes and short tricks free PDF in Hindi and English. In this particular we are providing you the short information about important chemistry question with tricks and. 

Science Chemistry Notes 

Some Important Chemistry MCQs with Correct Answers 

The graphite rods in the nuclear reactor

• A.    react with U to release energy
• B.    produce neutrons
• C.    undergo combustion which triggers the nuclear fission
• D.    convert fast moving neutrons into thermal neutrons

Ans-   D

The first metal used by man was

• A.    iron
• B.    copper
• C.    gold
• D.    bronze

Ans-   B

The hydroponic ion is

• A.    H+
• B.    HO -
• C.    H2+
• D.    H3O+

Ans-   D

The most Electromotive elements among the following is

• A.    Na
• B.    Ca
• C.    K
• D.    Cs

Ans-   D

The nucleus of an atom consists of

• A.    electrons and neutrons
• B.    electrons and protons
• C.    protons and neutrons
• D.    All of the above

Ans-   C

The number of moles of solute present in 1 kg of a solvent is called its

• A.    molality
• B.    morality
• C.    normality
• D.    formality

Ans-   A   

The most Electronegative element among the following is

• A.    sodium
• B.    bromine
• C.    fluorine
• D.    oxygen

Ans-   C

The metal used to recover copper from a solution of copper Sulphate is

• A.    Na
• B.    Ag
• C.    Hg
• D.    Fe

Ans-   D   

The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

• A.    p-electrons in Ne(Z = 10)
• B.    s-electrons in Mg(Z = 12)
• C.    d-electrons in Fe(Z = 26)
• D.    p-electrons in CI(Z = 17)

Ans-   D

The inherited traits of an organism are controlled by

• A.    RNA molecules
• B.    Nucleotide
• C.    DNA molecules
• D.    enzymes

Ans-   C

The heat energy produced when the human body metabolizes 1 gram of fat is

• A.    30 KJ
• B.    1 KJ
• C.    39 KJ
• D.    29 KJ

Ans-   C

What are the number of moles of CO2 which contains 16 g of oxygen?

• A.    0.5 mole
• B.    0.2 mole
• C.    0.4 mole
• D.    0.25 mole

Ans-   A
Note:- One mole of CO2 has mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.

The gas used in the manufacture of Vanaspati from vegetable oil is

• A.    hydrogen
• B.    oxygen
• C.    nitrogen
• D.    carbon dioxide

Ans-   A

The ionic radii of N3-, O2-, F- and Na+ follows the order

• A.    N3- > O2- > F- > Na+
• B.    N3- > Na+ > O2- > F-
• C.    Na+ > O2- > N3- > F-
• D.    O2- > F- > Na+ > N3-

Ans-   A

The metallurgical process in which a metal is obtained in a fused state is called

• A.    smelting
• B.    roasting
• C.    calcinations
• D.    froth floatation

Ans-   A

The most abundant rare gas in the atmosphere is

• A.    He
• B.    Ne
• C.    Ar
• D.    Xe

Ans-   C

The Latin word Formica means ant. The name formic acid is derived from this Latin word because

• A.    this acid, in ancient times, was used to eliminate ant-hills
• B.    this corrosive acid is secreted by ants to drive away their enemies
• C.    this acid was first obtained by the distillation of ants
• D.    ants are attracted by the odor of this acid

Ans-   C

The ore which is found in abundance in India is

• A.    monazite
• B.    fluorspar
• C.    bauxite
• D.    magnetite

Ans-   A

Source: Read Source

Chemistry Notes and eBooks are given below-

Chemistry Notes PDF in Hindi	Click here
Chemistry Notes PDF in English	Click here Click here
Handwritten Notes of Chemistry PDF	Click here
Handwritten Chemistry Notes PDF	Click here

Study Notes are given below: 

>>> Best 10000+ GK Questions with Answers (MCQs)

>>> Click here: English Grammar Short tricks books

>>> Click here: Best 10000+ math questions collection with tricks

You can also read these articles

Physics complete study material books and notes free PDF
Click here
Chemistry All notes and book 
Click here
Biology Complete study material book and notes 
Click here