These MCQs are mostly repeated in MDCAT, ECAT, Chemical Engineering Jobs tests and others Competitions tests in Which Chemistry MCQs are the Part of that tests exam.
50 MCQs Of Chemistry With Solved Answers
Q.1: A limiting reactants is one ?
- Which produces minimum number of moles of product.
- Which is present in least amount
- Does not effect the amount of product
- Which produces maximum number of moles of product.
Q.2: According to kinetic molecular theory of gases, molecules increase in the kinetic energy when they are ?
- Mixed with other molecules at low temperature
- Condensed into a liquid
- Melted from a solid to liquid state
- Frozen into a solid
Q.3: X-rays were discovered by ?
Q.4: Which of the following elements is not stable ?
Q.5: Which term was derived from “aroma” ?
Q.6: The five tributaries of the Indus River in Punjab are Jhelum, Chenab, Beas, Sutlej and -------- ?
- All of these
Q.7: The number of rivers in Sindh is ?
Q.8: Properties of metals are ?
- Malleable and ductile
- All are true
- Tarnish in air
- Form basic oxides
Q.9: The dipole moment of orthochlorobenzene is ?
- 1.70 D
- 2.5 D
- 2.70 D
- 1.5 D
Q.10: Sulphonation of benzene yields ?
- Benzene sulphonic acid
- Maleic anhydride
Q.11: 3-d series elements are present in ?
- First period
- Third period
- Second period
- 4th period
Q.12: Bakelite forms when phenol reacts with ?
- Nitric acid
- Sulphuric acid
Q.13: Which enzyme is not involved in the fermentation of starch ?
Q.14: If absolute temperature of a gas is doubled and pressure is reduced to one half, the volume of the gas will ?
- Reduce to 1/4
- Remain unchanged
- Be doubled
- Increase four times
Q.15: Swedish chemist J. Berzelius determined ?
- Atomic volume
- Atomic mass
- Atomic density
- Atomic number
Q.16: Atoms and molecules can either gain or lose electrons, forming charged particles called ?
Q.17: Plasma consists of ?
- Positive ions
- Negative electrons
- Mixture of all above
- Neutral particles
Q.18: Max planck proposed quantum theory is ?
Q.19: Dipole moment is defined as ?
- Bond energy x Charge
- Charge x Debye
- Charge x Distance
- Charge x Displacement
Q.20: Annually, amount of iron get corroded is of its production ?
Q.21: In exothermic reactions, ΔH is ?
- Given in surroundings
- Moe than products
Q.22: Calcium carbonate contains oxygen ?
Q.23: Oxidation of NO in air produces ?
Q.24: Ethanol can be converted into ethanoic acid by ?
Q.25: Which one of the following is a water soluble vitamin ?
- Ascorbic acid
Q.26: Which is (are) source of energy of human body ?
Q.27: Which of the following reagent will react with both aldehyde and ketones ?
- Tollen's reagent
- Grignard's reagent
- Fehling's reagent
- Benedict's reagent
Q.28: Polypeptide molecule have molecular mass upto ?
- 1000, 000
- 100, 000
Q.29: Benzyl acetate has flavour of ?
Q.30: Choose The Correct Answer: Commercial nitric acid is ?
- 86 percent
- 70 percent
- 46 percent
- 36 percent
Q.31: Choose The Correct Answer: The first step in naming a compound is the selection of ?
- Shortest carbon chain
- Functional group
- Longest carbon chain
- A carbon ring
Q.32: The experimental relationship between a reaction rate and the concentration of the reactants is known as ?
- Rate of reaction
- Rate law
- Law of man action
- Order of reaction
Q.33: Period number 6 contains elements in the ?
Q.34: Which is not the form of silica ?
- None of these
- Amethyst quartz
- Rose quartz
Q.35: All reactions occur in ?
- A single step
- A series of steps
- A single step and A series of steps
- Two step
Q.36: Ketones react with sodium nitroprusside alkaline giving precipitate ?
- Silver ppt
- White ppt
- Wine red or orange red
- Yellow or red ppt
Q.37: Any property which depends upon the state of system is called ?
- Free energy
- State function
- Internal energy
Q.38: Thermochemistry is the study of relationship between heat, energy and ?
- Energy of activation
- Kinetic energy
- Chemical energy
- Ionization energy
Q.39: Charge to mass ratio of electron was discovered by ?
- J.J. Thomson
Q.40: Among group V-A elements, the most electronegative element is ?
Q.41: Higher alcohols are ?
- Least soluble
- Less soluble
- Normal in solubility
- Best soluble
Q.42: A base catalysed nucleophilic addition reaction will take place with a nucleophilic reagent ?
- Intermediate of aldehydes
Q.43: While dividing exponential numbers, the exponents are ?
Q.44: By convention, a peptide having molecular mass upto 10, 000 is called ?
Q.45: Usually chemical reactions take place in ?
- Mixture from
- Very high pressure
- Gaseous phase
Q.46: The example of a photochemical reaction is photosynthesis has order of reaction ?
Q.47: Mineral oil is called ?
- Natural gas
- Diesel oil
Q.48: Alkanes can be prepared an Grignard’s reagent with ?
Q.49: Alkanes can be prepared an Grignard’s reaction with ?
Q.50: The number of barrages constructed on the River Indus are --------- ?