Chemistry/Chemistry MCQ Questions Set-13 Sample Test,Sample questions

Question:
All the member of homologous series can be represented by the same general formula. Choose the INCORRECT formula from among the following.

Alkane - Cn H2n+2
Alkene - Cn H2n+1
Alkyne - Cn H2n-2

 

1.Alkane - Cn H2n+2 and Alkyne - Cn H2n-2

2.Alkane - Cn H2n+2

3.Alkene - Cn H2n+1

4. Alkyne - Cn H2n-2


Question:
An element having atomic number 17 will resemble which of the following elements having Atomic number as given below?

 

1.33

2.34

3.18

4.34


Question:
Brass is an alloy made of

1. Copper and Tin

2.Copper and Zinc

3.Copper and Aluminium

4.Copper and Iron


Question:
During combustion of unsaturated compounds a ___ is seen.

1.clean flame

2.blue flame

3.red flame

4.yellow flame


Question:
Galvanization a process to prevent rusting involves use of ___ coating to steel or iron.

1.Nickel

2.Magnesium

3.Copper

4.Zinc


Question:
Identify a use of the isotope of uranium.

1.Fuel in nuclear reactors

2.Treatment of goitre

3.Treatment of cancer

4.Fuel in aeroplanes


Question:
In Newlands table the elements ___ were placed with the halogens.

1.Ce and La

2.Fe and Se

3.Mn and As

4.Co and Ni


Question:
In which of the following groups of the modern periodic table are the noble gases placed?

1.16

2.18

3.17

4.15


Question:
Least distance of distinct vision for normal eye is

1.15cm

2.20cm

3.25 cm

4.30cm


Question:
Name the only metal that is antibacterial.

 

1.Iron

2.Sodium

3.Aluminium

4.Copper


Question:
One should use porcelain and not metal containers in a microwave oven because..

1.Charge may accumulate on the metal surface and there is danger of getting a shock

2.Porcelain vessels are better conductors of heat and thus food gets cooked quickly

3.Metal containers might undergo chemical reaction leading to spoilage of food

4.Porcelain vessels are cheaper than the metal containers


Question:
Pernicious anaemia is caused by the deficiency of vitamin .......

1.B2

2.B6

3.B3

4.B1


Question:
Rupee 5 and 10 coins are now made of

1.Ferritic stainless steel

2.Silver and steel

3.Cupro nickel alloy

4.Copper and brass


Question:
Safety matches contain

1.Sulphur

2.Phosphorus

3.Magnesium

4.Potassium


Question:
The 4th and 5th periods contain:

1. 8 elements

2.18 elements

3.11 elements

4.9 elements


Question:
The mass number of an isotope of an element is 298. If its nucleus has 196 neutrons what is its atomic number?

1.196

2.102

3.494

4.298


Question:
The most active ingredient in bleaching powder is

1.Iodine

2. Calcium hypochlorite

3. Nitric acid

4.Ammonium sulphate


Question:
The smell that we get when LPG cylinder leaks is due to the presence of

1.Nitrogen peroxide

2.Carbon monoxide

3.Sulphur compound

4.Carbon dioxide


Question:
What happens when dilute hydrochloric acid is added to iron filings?

 

1.Only chloride are produced

2.Hydrogen gas and iron chloride are produced

3.No reaction take place

4.Only hydrogen gas is produced


Question:
What is mixing an acid with water that results in a decrease in the concentration of ions per unit volume called?

 

1.Dilution

2.Neutralisation

3.Acidification

4.Concentration


Question:
What is the maximum number of electrons that the  outermost shell can have?

 

1.2

2.6

3.8

4.none


Question:
What is the molecular formula of Calcium Phosphate?

1.Ca3(PO4)2

2.Ca(PO4)2

3.CaPO4

4.Ca3(PO4)3


Question:
What is the number of atoms constituting a molecule known as?


1.Atomicity

2.Atomic mass

3. Atomic number

4.Isotopes


Question:
When copper oxide is heated with hydrogen. copper metal and water are formed. What happens to the hydrogen in this reaction?

 

1.both oxidation and reduction

2.Reduction

3.Oxidation

4.Decomposition


Question:
When milk becomes sour ___ is produced.

1.Lactose

2.Lactic acid

3.Salicylic acid

4.Linoleic acid


Question:
Which among the following happens in an oxidation reaction?

1.Electrons are gained

2.Electrons are lost

3.Protons are gained

4.Protons are lost


Question:
Which among the following has its refractive index closest to that of crown glass?

 

1.Diamond

2.Ruby

3.Sapphire

4.Canada balsam


Question:
Which among the following is a cation?

 

1.Ammonium

2.Iodide

3.Chloride

4.Calcium


Question:
Which among the following is popularly called Laughing gas?

1.Nitric oxide

2.Nitrogen dioxide

3.Nitrous oxide

4.Nitrogen peroxide


Question:
Which gas is released when bleaching powder is added to water?

1.Carbon Dioxide

2.Hydrogen

3.Chlorine

4.Carbon Monoxide


Question:
Which of the following acids is NOT present in grapes?

 

1.Acetic acid

2.Malic acid

3.Tartaric acid

4.Citric acid


Question:
Which of the following can be used as a catalyst in Hydrogenation reaction?

 

1.Barium

2.Iron

3.Tungsten

4.Palladium


Question:
Which of the following can undergo sublimation?

 

1. Ammonium chloride

2.Ammonium chlorate

3.Ammonium sulphate

4.Ammonium phosphate


Question:
Which of the following gases is consistently seen to be most abundant in a volcanic eruption?

 

1.Sulphur Dioxide

2.Carbon Dioxide

3.Water vapour

4.Hydrogen Sulphide


Question:
Which of the following is a chemical change?

1.Butter turning rancid

2.Making dry ice from CO2

3.Heating a platinum wire

4.Magnetisation of iron


Question:
Which of the following is also known as Epsom salt?

 

1.Calcium Sulphate

2.Magnesium Sulphate

3.Sodium Sulphate

4.Ferrous Sulphate


Question:
Which of the following is an example of a metal that needs to be stored under oil?

1.Potassium

2.Gold

3.Iron

4.Silver


Question:
Which of the following is not an example of a biomass energy source?

1.Wood

2.Ethanol

3.Cow dung

4. Atomic energy


Question:
Which of the following is NOT an ore of iron?

 

1.Cuprite

2.Haematite

3.Magnetite

4.Siderite


Question:
Which of the following is used as a substitute of mercury in thermometers?

 

1.Selenium

2.Arsenic

3.Galinstan

4.Bromine


Question:
Which of the following is used for removing permanent hardness of water?

 

1.Lime

2.Washing soda

3.Bleaching powder

4.Baking soda


Question:
Which of the following is used in the preparation of vinegar?

1.Methanol

2.Acetic acid

3.Ethanol

4.Ethanoic acid


Question:
Which of the following is used to remove the green colour from glass?

1.Manganese dioxide

2.Sulphur dioxide

3.Titanium dioxide

4.Silicon dioxide


Question:
Which of the following metals reacts vigorously with cold water?

1.Potassium

2.Aluminium

3.Zinc

4.Iron


Question:
Which of the following statement(s) is/are CORRECT?

 

I. Carbon compounds linked by only single bond are called saturated compounds.

II. Carbon compounds having double or triple bonds are called unsaturated compounds.

III. Saturated carbon compounds are more reactive than unsaturated carbon compounds.

 

1.Only I and II

2.Only I and III

3.Only II and III

4. All I II and III


Question:
Who predicted the existence of some yet to be discovered elements on the basis of gaps in his periodic table?

 

1.Mendeleev

2.Dobereiner

3.Newlands

4.Darwiin


Question:
__ are homogeneous mixtures of two or more components.

 

1.Amalgams

2.Solutions

3.Enzymes

4.Emulsions


Question:
___ is one of the states of matter obtained by cooling a gas of very low density to extremely low temperatures.

1.Gas

2.Plasma

3.Bose-Einstein Condensate (BEC)

4.Plasma Condensate


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