Science Chemistry MCQ-191

General Science-Chemistry online Exam UPSC, JPSC, CivilsPrelims, SSC, NDA, RBI, UPPSC, CDS Exams



Insoluble suspended impurities in muddy water or any other liquid can be separated if it is first . allowed to stand for some time. The insoluble heavy impurities settle down under the force of gravity, leaving the clear liquid above. These impurities are called :

 
 
 
 

Dry air is composed of oxygen, nitrogen and other gases. It is a

 
 
 
 

A mixture that can be separated by sublimation method is :

 
 
 
 

Select the false statement:

 
 
 
 

Match list 1 with list II and select the correct answer from the codes given below the lists :
List I———— List II

A . Thallium 1 . Tm
B . Thorium 2 . Tl
C . Thulium 3 . Tb
D . Tirbium 4 . Th
Codes:
ABCD

 
 
 
 

Which of the following is a compound ?

 
 
 
 

A mixture of ethyl alcohol and water can be separated by :

 
 
 
 

Which of the following is an element ?

 
 
 
 

Diamond is:

 
 
 
 

An azeotropic mixture is a mixture which has : Which of the following statements is incorrect for

 
 
 
 

Which one of the following elements is used as a catalyst in the dehydration of vegetable oils ?

 
 
 
 

Which one of the following is a mixture ?

 
 
 
 

a mixture ?

 
 
 
 

A material consisting of two or more kinds of matter, each retaining its characteristic properties is called a/an

 
 
 
 

The symbol of copper is

 
 
 
 

The formula of sodium thiosulphate is

 
 
 
 

Match the following
List I——-List-II

(A) Radium 1 .Fm
(B)Titanium 2 .In
(C)Indium 3 .Ti
(D)Fermium 4 .Ra
Codes:

A B C D

 
 
 
 

Which of the following is not correctly matched

 
 
 
 

German silver is a/an

 
 
 
 

The law of multiple proportions was proposed by

 
 
 
 

The ratio in weight by which carbon and oxygen combine in a molecule of carbon monoxide is

 
 
 
 

Match List-I with List-II and select the correct answer using the codes given below the list
List I

A. Law of conservation of mass
B. Law of multiple proportion
C. Law of reciprocal proportions
D. Law of the constant composition

List II

I Dalton
II Richter
III Lavoisier
IV Lewis Proust
Codes:
A B C D

 
 
 
 

Which of the following compounds conform the law of multiple proportion ?

 
 
 
 

In which of the following the symbol of the element is correctly given ?

 
 
 
 

The symbol of nickel is