laboursonline – MCQs, Mock Tests | Chemistry Chemistry MCQ Question

Which of the following elements react with steam to produce H2 gas.

1. Pd
2. Ni
3. Sn
4. All of the above

✅ Correct Answer: 4

Which of following metals can be displaced by all other metals from its solution

1. Ag
2. A?
3. Au
4. Cu

✅ Correct Answer: 3

The unit of the rate constant (k) is same as that of rate of reaction

1. First order reaction
2. Second order reaction
3. Zero order reaction
4. Third order reaction

✅ Correct Answer: 3

Which of the elements do not fall in stair case of the modern periodic table

1. Si
2. As
3. Te
4. None of the above

✅ Correct Answer: 4

Acid present in acid rain may be

1. H2SO4
2. HNO3
3. both a and b
4. none of the above

✅ Correct Answer: 3

Across short period the melting and boiling point increase upto

1. IIIA group
2. IVA group
3. VA group
4. VIA group

✅ Correct Answer: 2

Which of the following elements conduct electricity and also melts below 100?C

1. Aluminium
2. Sodium
3. Carbon
4. Sulphur

✅ Correct Answer: 2

Which of the following is the formula of chrome red.

1. Pb3 O4
2. 2Pb CO3 - Pb (OH)2
3. Pb Cr O4 - Pb (OH)2
4. Pb2O

✅ Correct Answer: 1

The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is

1. Ethylene iodide
2. Ethylene bromide
3. Ethylene chloride
4. Ethylene fluoride

✅ Correct Answer: 2

Regular coiling or zigzagging of polypeptide through hydrogen bonding is its

1. Quantum structure
2. Secondary structure
3. Tertiary structure
4. Primary structure

✅ Correct Answer: 2

Which of the following technique is used for the separation of insoluble particles from liquids?

1. Filtration
2. Crystallization
3. Solvent extraction
4. Chromatography

✅ Correct Answer: 1

Which of the following way in used for classification of chromatography?

1. Shape
2. Phase
3. Mechanism
4. All

✅ Correct Answer: 4

Fluted filter paper is used to

1. Filter hot solution
2. Avoid premature crystallization
3. Increase the rate of filtration
4. Decrease the area

✅ Correct Answer: 3

Safe and the most reliable method of drying crystals is through

1. Filter paper
2. Vacuum desiccators
3. Oven
4. None of these

✅ Correct Answer: 2

A substance having very high vapour pressure at its melting point on heating will show

1. Melting
2. Sublimation
3. Decomposition
4. Condensation

✅ Correct Answer: 2

A process controlled by Distributive law is

1. Crystallization
2. Sublimation
3. Solvent extraction
4. Filtration

✅ Correct Answer: 3

A technique of partition chromatography in which the solvent is in a pool at the bottom of container

1. Adsorption chromatography
2. Ascending chromatography
3. Radial chromatography
4. Descending chromatography

✅ Correct Answer: 2

Different components of a mixture have different Rf values due to

1. Polar solvent used
2. Combination of solvents used
3. Their different distribution coefficients in the solvent
4. Distributive law

✅ Correct Answer: 3

Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is

1. Stoichio chemistry
2. Physical chemistry
3. Analytical chemistry
4. Quantum chemistry

✅ Correct Answer: 3

Identification of the components of a sample is

1. Quantitative analysis
2. Qualitative analysis
3. Stoichiometry
4. Physical chemistry

✅ Correct Answer: 2

Estimation of amounts of different components in a sample is

1. Quantitative analysis
2. Qualitative analysis
3. Stochiometery
4. Physical chemistry

✅ Correct Answer: 1

The technique used to separate components of mixture in solid phase.

1. Crystallization
2. Filtration
3. Sublimation
4. Solvent extraction

✅ Correct Answer: 3

The solid which is left over the filter paper as a result of filtration

1. Insoluble particles
2. residue
3. crystals
4. mud

✅ Correct Answer: 2

Size of filter paper is selected according to the amount of

1. solution
2. amount of insoluble solute
3. amount of soluble solute
4. Amount of solvent

✅ Correct Answer: 2

Gooch Crucibles are made up of

1. plastic
2. fibre
3. porcelain
4. steel

✅ Correct Answer: 3

Rate of filtration can be increased by applying gentle suction

1. Gooch crucible
2. Filter paper
3. Sintered crucible
4. All of the above

✅ Correct Answer: 2

Sintered crucible is made up of

1. Plastic
2. glass
3. porcetain
4. fiber

✅ Correct Answer: 2

The tip of funnel should touch the wall of the breaker in order to avoid

1. Inconsistent flow of filtration
2. splashing
3. premature crystallization
4. all of above

✅ Correct Answer: 2

Separation of a solid from its hot saturated solution by cooling is called

1. vapourization
2. solvent extraction
3. filtration
4. crystallization

✅ Correct Answer: 4

In crystallization if the solvent is inflammable then direct heating is

1. needed
2. avoided
3. depends on temperature
4. crystallization does not involve heating

✅ Correct Answer: 2

Which of the following technique is simple and efficient to purify a substance

1. Filtration
2. Sublimation
3. Crystallization
4. Solvent extraction

✅ Correct Answer: 4

In solvent extraction ether is used to separate products of organic synthesis from

1. water
2. iodine
3. hydrochloric acid
4. gases

✅ Correct Answer: 1

95% ethanol is called

1. methylated spirit
2. wood spirit
3. rectified spirit
4. absolute alcohol

✅ Correct Answer: 3

The use of CaCl2 and PCl5 in the process of crystallization is as a

1. oxidizing agent
2. reducing agent
3. drying agent
4. colouring agent

✅ Correct Answer: 3

Ratio of the amount of solute in organic and aqueous solvent is

1. Retardation factor
2. Distribution co-efficient
3. Distribution in aqueous solution
4. All statements are wrong

✅ Correct Answer: 2

Without suction pump filtration is

1. Fast process
2. Slow process
3. Rapid process
4. All are possible

✅ Correct Answer: 2

Animal charcoal adsorbs the coloured

1. impurities
2. crystals
3. solvents
4. both a & b

✅ Correct Answer: 1

Direct conversion of solids into vapours is called

1. Solvent extraction
2. sublimation
3. crystallization
4. vaporization

✅ Correct Answer: 2

Crystallization does not involve

1. heating
2. sublimation
3. cooling
4. vaporization

✅ Correct Answer: 2

In CCI4 I2 shows

1. Red colour
2. Purple colour
3. Blue colour
4. Yellow colour

✅ Correct Answer: 2

Repeated extraction using small portions of solvents is more

1. Reliable
2. Efficient
3. Rapid
4. slow

✅ Correct Answer: 2

Silica gel and alumina are used as

1. Mobile phase
2. Stationary phase
3. Mixed phase
4. Single phase

✅ Correct Answer: 2

Shaking two immiscible liquids increases

1. Length of contact
2. Volume of contact
3. Area of contact
4. all of above

✅ Correct Answer: 3

The solvent or mixture of solvents used for separation of compounds is called

1. Stationary phase
2. Mobile phase
3. Dynamic phase
4. Static phase

✅ Correct Answer: 2

Which is not a sublime material

1. Iodine
2. Benzoic acid
3. Ammonium chloride
4. Potash alum

✅ Correct Answer: 4

Sintered glass is a porous material used for

1. absorption
2. adsorption
3. filtration
4. sublimation

✅ Correct Answer: 3

Selection of filter paper depends on size of particles to be

1. filtered
2. dried
3. decolorized
4. decanted

✅ Correct Answer: 1

The solution remaining after the formation of crystals is called

1. Mother liquor
2. Dilute solution
3. Residue
4. both a & b

✅ Correct Answer: 1

Which is not related pair of term used in analytical techniques

1. Filtrate residue
2. Sublimate sublimation
3. Drying desiccator
4. Separating funnel mother liquor

✅ Correct Answer: 2

The major steps involved in complete quantitative analysis are

1. 2
2. 3
3. 4
4. 5

✅ Correct Answer: 3

Chemistry MCQ Quiz Hub

Chemistry MCQ Question - Experimental Techniques