Science Chemistry MCQ-183

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



The British physicist who received the 1923 Nobel Prize in Physics for discovering the electron is

 
 
 
 

The brown ring in the test for nitrates is due to

 
 
 
 

The brownring test is used for

 
 
 
 

The carbon-carbon bond length is shortest in

 
 
 
 

The cause of periodicity of properties is

 
 
 
 

The Central Electrochemical Research Institute is located at

 
 
 
 

The charcoal used to decolourise brown sugar solution is

 
 
 
 

The charge on the electron is

 
 
 
 

The chemical composition of four well known items which are used in large quantities are given below. Which one is incorrect?

 
 
 
 

The chemical name of bauxite is

 
 
 
 

The chemical name of laughing gas is

 
 
 
 

The chemical name of quartz is

 
 
 
 

The chemical name of table salt is

 
 
 
 

The chemical name of vitamin C is .

 
 
 
 

The chief constituent of gobar gas

 
 
 
 

The chloride of a metal (M) contains 65.5% of chlorine. 100 ml of the vapour of the chloride of the metal of STP weigh 0.72 g. The molecular formula of the metal chloride is

 
 
 
 

1 mole of N2H4 loses 10 moles of electrons to form a new compound Y. Assuming that all the nitrogen appear in the new compound, what is the oxidation state of nitrogen in Y? (no change in oxidation state of hydrogen)

 
 
 
 

Which of following is isomporphous with magnesium sulphate (MgSO4.7 H2O)?

 
 
 
 

The colour of hydrogen is

 
 
 
 

The colour of violet glass is due to the presence of

 
 
 
 

The combustible material on the tip of a safety match stick is

 
 
 
 

The commercial name for calcium hydride is

 
 
 
 

The common method of extraction of metals from oxide ores is

 
 
 
 

The compound which has one isopropyl group is

 
 
 
 

The compounds represented by the general formula CHX3, where X is a halogen atom, are called