R4RIN – MCQs, Mock Tests | Chemistry Chemistry MCQ Questions Set-4

The main constituent of biogas is

1. Butane
2. Methane
3. Hydrogen Sulphide
4. Carbondioxide

✅ Correct Answer: 2

The element common to all acids is

1. Hydrogen
2. Oxygen
3. carbon
4. Sulphur

✅ Correct Answer: 1

What is the molecular formula of Butyne?

1. c3H4
2. c4H6
3. c2H2
4. c4H10

✅ Correct Answer: 2

The formula C6H14 represents the hydrocarbon

1. Hexene
2. Heptyne
3. Hexane
4. Hexyne

✅ Correct Answer: 3

The bonds in the compound MgSO4 can be described as

1. covalent
2. ionic
3. both A & B
4. None of the above

✅ Correct Answer: 3

If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C then A and C are in equilibrium with each other. This is a statement of

1. Cyclic rute
2. Zeroth law of thermodynamics
3. First law of thermodynamics
4. Second law of thermodynamics

✅ Correct Answer: 2

Which combination will produce a precipitate?

1. NaOH (aq) and HCl (aq)
2. KOH (aq) and Mg(NO3)2 (aq)
3. NaC2H3O2(aq) and HCl (aq)
4. AgNO3(aq) and Ca(C2H2O3) (aq)

✅ Correct Answer: 2

Discovery of the nucleus of an atom was due to the experiment carried out by

1. Bohr
2. Rutherford
3. Moseley
4. Thomson

✅ Correct Answer: 2

Cathode rays are

1. electromagnetic wave
2. stream of alpha particle
3. stream of electrons
4. radiations

✅ Correct Answer: 3

The maximum number of hydrogen bonds in a water molecule is...........

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

✅ Correct Answer: 3

What element behaves most like magnesium?

1. Silicon
2. Strontium
3. Sulphur
4. Tin

✅ Correct Answer: 2

The reactivity of an atom arises from

1. the existence of unpaired electrons in the valence shell
2. the energy differences between the electron shells
3. the sum of the potential energies of all the electron shells
4. the average distance of the outermost electron shell from the nucleus

✅ Correct Answer: 1

Intermolecular forces in HCl are

1. Hydrogen bonding
2. Dipole-dipole
3. Dispersion force
4. All the above

✅ Correct Answer: 4

What is the heaviest noble gas?

1. krypton
2. radon
3. helium
4. xenon

✅ Correct Answer: 2

Which of the following statements about monosaccharide structure is true?

1. Aldoses and ketoses differ in the position of their hydroxyl groups.
2. Monosaccharides can be classified according to the spatial arrangement of their atoms.
3. All monosaccharides contain carbon hydrogen oxygen and nitrogen atoms.
4. A six-carbon sugar is called a pentose.

✅ Correct Answer: 2

Select the correct statement (s).

1. When energy is transferred to the system from the surrounding as work the surrounding do work on the system and the value of work (W) positive.
2. When energy is transferred from the system to the surrounding as work work is done on the surrounding and the value of W is negative.
3. Both (A) and (B)
4. None of the above

✅ Correct Answer: 3

Which type of molecule is CF4?

1. nonpolar with a symmetrical distribution of charge
2. polar with an asymmetrical distribution of charge
3. nonpolar with an asymmetrical distribution of charge
4. polar with a symmetrical distribution of charge

✅ Correct Answer: 1

Formation of anions occurs by

1. loss of neutrons
2. gain of protons
3. gain of electrons
4. none

✅ Correct Answer: 3

An alloy is

1. a compound
2. an allotropic form
3. an isomer
4. a mixture

✅ Correct Answer: 4

Which one of the following statements is not correct?

1. Fischer projection represents the molecule in an eclipsed conformation
2. Newman projection can be represented in eclipsed staggered and skew conformations
3. Fischer projection of the molecule is its most stable conformation
4. In Sawhorse projections the lines are inclined at an angle of 120 deg to each other.

✅ Correct Answer: 3

Which of the following is NOT a property of bases?

1. They react with acids and neutralise them
2. They turn red litmus blue
3. They turn blue litmus red
4. They have bitter taste

✅ Correct Answer: 3

Give a possible molecular formula for C3H5ClO?

1. C6H10Cl2O2
2. C6H10O2
3. C6H10ClO2
4. C6H12Cl2O2

✅ Correct Answer: 1

The first indication that a stable nucleus can be broken down was afforded by

1. Rutherford
2. Madam Curie
3. Soddy
4. Schmidt

✅ Correct Answer: 1

Cathode rays have

1. mass only
2. charge only
3. no mass and no charge
4. mass and charge both

✅ Correct Answer: 4

A yellow element that stinks when burned

1. Sulphur
2. Chlorine
3. Fluorine
4. Bromine

✅ Correct Answer: 1

When combining with nonmetallic atoms metallic atoms generally will

1. Lose electrons and forms cations
2. Gain electrons and forms anions
3. Lose electrons and forms anions
4. Gain electrons and forms cations

✅ Correct Answer: 1

Dry distillation of calcium formate gives

1. HCOOH
2. CH3COOH
3. HCHO
4. CH3CHO

✅ Correct Answer: 3

Trichloroacetaldehyde was subject to Cannizzaros reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :

1. Chloroform
2. 2 2 2-Trichloroethanol
3. Trichloromethanol
4. 2 2 2-Trichloropropanol

✅ Correct Answer: 2

The number of neutrons in dipositive Zinc ion is

1. 34
2. 36
3. 38
4. 40

✅ Correct Answer: 4

Neutron was discovered by

1. J.J.Thomson
2. Chadwick
3. Rrutherford
4. Priestley

✅ Correct Answer: 2

What is the oxidation number of carbon in NaHCO3?

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

✅ Correct Answer: 3

The alpha-particles are

1. high energy electrons
2. positively charged hydrogen irons
3. high energy x ray radiations
4. double positively charged helium nuclei

✅ Correct Answer: 4

According to the modern Periodic Law the properties of elements are periodic functions of their

1. volency
2. atomic mass
3. number of neutrons
4. atomic number

✅ Correct Answer: 4

Washing soda is

1. sodium hydroxide
2. sodium carbonate
3. sodium bicorbonate
4. Potassium chloride

✅ Correct Answer: 2

The activity of rradioisotope change with

1. temperature
2. pressure
3. chemical environment
4. None of these

✅ Correct Answer: 4

Which subatomic particle has a negative charge?

1. Neutron
2. Proton
3. Ion
4. Electron

✅ Correct Answer: 4

Which reaction occurs spontaneously?

1. Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq)
2. I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)
3. Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq)
4. I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)

✅ Correct Answer: 3

What is the systematic name of PbO?

1. Plumbic oxide
2. Lead oxide
3. Lead(II) oxide
4. All of the above

✅ Correct Answer: 3

A bond formed by the transfer of electrons betwwen atoms of the elements is called

1. ionic bond
2. covalent bond
3. co ordinate bond
4. none

✅ Correct Answer: 1

Under which conditions are gases most soluble in water?

1. low pressure and low temperature
2. low pressure and high temperature
3. high pressure and low temperature
4. high pressure and high temperature

✅ Correct Answer: 3

Leakage of which of the following gases caused the Bhopal gas tragedy ?

1. Carbon monoxide
2. Methyl isocyanate
3. Nitrous oxide
4. Hydrogen sulphide

✅ Correct Answer: 2

The element that has the highest first ionization potential is.......

1. Oxygen
2. Carbon
3. Boron
4. Nitrogen

✅ Correct Answer: 4

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

1. An acetylenic triple bond
2. Two ethylenic double bonds
3. A vinyl group
4. An isopropyl group

✅ Correct Answer: 3

Which among the following noble gas has highest molar mass?

1. Kr
2. Ne
3. Ar
4. Xe

✅ Correct Answer: 4

Group displacement law was given by

1. Bacquerel
2. Rutherford
3. Mendeleaf
4. Soddy and Fajan

✅ Correct Answer: 4

Which one of the following elements cannot be detected by Lassaignes test?

1. I
2. Cl
3. S
4. F

✅ Correct Answer: 4

What is the systematic name of NH4ClO3?

1. Ammonium Chloride
2. Ammonium Chlorate
3. Ammonium Chlorane
4. Ammonium Chlorine

✅ Correct Answer: 2

Minamata disease was caused by ?

1. Lead
2. Mercury
3. Cadmium
4. Zinc

✅ Correct Answer: 2

Standard Electrode potential is measured in terms of

1. Pyrometer
2. Electrometer
3. Thermometer
4. Voltmeter

✅ Correct Answer: 4