R4RIN – MCQs, Mock Tests | Chemistry Chemistry MCQ Questions Set-1

The purest form of iron is

1. wrought iron
2. steel
3. pig iron
4. nickel steel

✅ Correct Answer: 1

Among the following the maximum covalent character is shown by the compound (1)MgCl2 (2)FeCl2 (3)SnCl2 (4) AlCl3

1. Option 1
2. Option 2
3. Option 3
4. Option 4

✅ Correct Answer: 4

Hydrogen bomb is based on the principle of

1. nuclear fission
2. nuclear fusion
3. natural radioactivity
4. artificial radioactivity

✅ Correct Answer: 2

Boron cannot form which one of the following anions? (1) BO?2 (2) BF3?6 (3) BH?4 (4) B(OH)?4

1. Option 1
2. Option 2
3. Option 3
4. Option 4

✅ Correct Answer: 2

SI unit of equivalent conductance

1. ohm/cm
2. Siemens m2/equivalent
3. Siemens/equivalent
4. mho/cm

✅ Correct Answer: 2

Silver Mirror test is given by which one of the following compounds? 1. Benzophenone 2. Acetaldehyde 3. Acetone 4. Formaldehyde

1. Only 1
2. Only 2
3. 1 and 3
4. 2 and 4

✅ Correct Answer: 4

Which pair of atoms has the highest electronegativity difference? (Calciums electronegativity is 1.0 Fluorines electronegativity is 4.0 Hydrogens electronegativity is 2.2 Sodiums electronegativity is 0.93

1. F-F
2. Ca-F
3. H-F
4. Na-F

✅ Correct Answer: 4

Which of the following is a non metal that remains liquid at room temperature ?

1. Chlorine
2. Phosphorous
3. Bromine
4. Helium

✅ Correct Answer: 3

which of the following are chemical changes? A) Cooking of Food B) Digestion of Food C) Freezing of water D) Water is heated up

1. A & B
2. A B & C
3. C & D
4. All the above

✅ Correct Answer: 1

Which one of the following is not a mixture

1. air
2. mercury
3. milk
4. cement

✅ Correct Answer: 2

Among the given nutrients milk is a poor source of

1. Calcium
2. Protein
3. Vitamin C
4. Carbohydrates

✅ Correct Answer: 3

A breath test used by traffic police to check drunken driving uses ____?

1. Turmeric on filter paper
2. Silica gel coated with silver nitrate
3. potassium permanganate-sulphuric acid
4. Potassium dichromatic-sulphuric acid

✅ Correct Answer: 4

Brass gets discoloured in air because of the presence of which of the following gases in air ?

1. Hydrogen sulphide
2. Oxygen
3. Nitrogen
4. Carbon dioxide

✅ Correct Answer: 1

Which of the following reactions are exothermic? 1) C + O2 ? CO22) 2Mg + O2 ? 2MgO3) CuSO4 + 5H2O ? CuSO4.5H2O4) All the above

1. 1
2. 2
3. 3
4. 4

✅ Correct Answer: 4

What is the structure of IF7 ?

1. Triagonal bipyramid
2. Pentagonal bipyramid
3. Square pyramid
4. tetrahedral

✅ Correct Answer: 2

what is the chemical name of the compound Cu2CO3

1. copper (ii) carbonate
2. copper (iii) carbonate
3. copper (i) carbonate
4. copper carbonate

✅ Correct Answer: 3

What is the IUPAC name for the following compound? H3C?C?C?H

1. Acetylene
2. Methyl acetylene
3. Butanol
4. Decanoic Acid

✅ Correct Answer: 2

Is C2 Paramagnetic or Diamagnetic?

1. Paramagnetic
2. Diamagnetic
3. Ferromagnetic
4. Cant be determined

✅ Correct Answer: 2

When formaldehyde and potassium hydroxide are heated we get

1. Acetylene
2. Methyl alcohol
3. Methane
4. Ethyl formate

✅ Correct Answer: 2

Name the Scientist who stated that matter can be converted into energy

1. Boyle
2. Lavoisier
3. Avogadro
4. Einstein

✅ Correct Answer: 4

Which of the Following is an Amorphous solid?

1. Quartz Glass(Sio2)
2. Chrome Alum
3. Silicon Carbide(SiC)
4. Graphite

✅ Correct Answer: 1

Place these hydrocarbons in order of decreasing boiling point. 1. Paraffin 2. Octadecane 3. Hexane 4. Neohexane and 5. Ethane

1. Paraffin > Octadecane > Neohexane > Hexane > Ethane
2. Paraffin > Octadecane > Hexane > Neohexane > Ethane
3. Hexane > Paraffin > Octadecane > Neohexane > Ethane
4. None of the above

✅ Correct Answer: 2

The enzyme that converts glucose to ethyl alcohol is

1. Maltase
2. Zymase
3. Diastase
4. Invertase

✅ Correct Answer: 2

Permanent Hardness of water can be removed by adding

1. Bleaching powder
2. Chlorine
3. Wasshing soda
4. Potassium permanganate

✅ Correct Answer: 3

Give the common name for the following compound (CH3)2CH CH2 ? Br

1. Isobutyl bromide
2. Methyl bromide
3. Propyl bromide
4. Butyl bromide

✅ Correct Answer: 1

What is the oxidation number of sulfur in H2S?

1. 2
2. -2
3. 1
4. -1

✅ Correct Answer: 2

A mixture of sand and naphthalene can be separated by

1. Fractional distillation
2. Sublimation
3. Chromatography
4. Any of them

✅ Correct Answer: 2

Which solution is most concentrated?

1. 6 g of solute in 10 ml of solution
2. 20.5 g of solute in 50 ml of solution
3. 30 g of solute in 120 ml of solution
4. 2.6 g of solute in 2 ml of solution

✅ Correct Answer: 4

What is the third most common gas found in the air we breathe ?

1. Argon
2. Neon
3. Carbondioxide
4. Hydrogen

✅ Correct Answer: 1

Which one of the following substances does not have a melting point

1. bromine
2. sodium chloride
3. mercury
4. glass

✅ Correct Answer: 4

Yellow cake an item of smuggling across border s

1. A crude form of heroin
2. A crude form of cocaine
3. Uranium oxide
4. Unrefined gold

✅ Correct Answer: 3

Which one of the following mixture is homogeneous

1. starch and sugar
2. methanol and water
3. graphite and charcoal
4. calcium carbonate and calcium bicarbonate

✅ Correct Answer: 2

Cobalt - 60 is commonly used in radiation therapy because it emits

1. alpha - rays
2. beta rays
3. gamma rays
4. X - rays

✅ Correct Answer: 3

he M.K.S. system was first introduced by

1. archimedes
2. Eienstein
3. Newton
4. Giorgi

✅ Correct Answer: 4

NH3 oxidation number?

1. -1
2. 1
3. 0
4. -3

✅ Correct Answer: 3

The discovery of neutron became very late because

1. it is present in nucleus
2. it is a fundamental particle
3. it does not move
4. it does not carry any charge

✅ Correct Answer: 4

The absolute value of charge on electron was determined by

1. J.J.Thomson
2. R.A. Millikan
3. Rutherford
4. Chadwick

✅ Correct Answer: 2

The electrochemical cell stops working after some time because ________

1. Electrode potential of both the electrodes becomes zero
2. One of electrodes completely vanishes
3. Electrode potential of both electrodes equalizes
4. The reaction reverses its direction

✅ Correct Answer: 3

How many electrons are there in Na+

1. 1
2. 10
3. 11
4. 12

✅ Correct Answer: 2

Temporary hardness is due to the presence of

1. Calcium carbonate
2. calcium bicarbonate
3. magnesium sulphate
4. calcium sulphate

✅ Correct Answer: 2

The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 at 27 Degree C is to a volume of 100 dm3

1. 42.3 J/ mole / K
2. 38.3 J/ mole / K
3. 35.8 J/ mole / K
4. 32.3 J/ mole / K

✅ Correct Answer: 2

When water freezes its density

1. decreases
2. remains constant
3. increases
4. become zero

✅ Correct Answer: 1

Misch metal is widely used in manufacture of which of the following

1. Material of car brake
2. Smoke detectors
3. Cigarette lighters
4. Emergency lights

✅ Correct Answer: 3

What is the element present in urea

1. CHO
2. CNO
3. CNH
4. CONH

✅ Correct Answer: 4

The reduction potential of hydrogen half-cell will be negative if : (1) P(H2)= 2 atm and [H+] = 2.0 M (2) P(H2)= 1 atm and [H+] = 2.0 M (3) P(H2)= 1 atm and [H+] = 1.0 M (4) P(H2)= 2 atm and [H+] = 1.0 M

1. Option 1
2. Option 2
3. Option 3
4. Option 4

✅ Correct Answer: 4

Which of the following is NOT a compound?

1. Ammonia
2. Milk
3. Sodiumchloride
4. Chalk

✅ Correct Answer: 2

Which one of the following elements is essential for construction is nuclear reactors

1. Cobalt
2. Nickel
3. Zirconium
4. Tungsten

✅ Correct Answer: 3