laboursonline – MCQs, Mock Tests | Chemistry Chemistry MCQ Question

Which of the following processes is used for the synthesis of cement?

1. dry process
2. wet process
3. both
4. none

✅ Correct Answer: 3

Phosphorus helps in the growth of

1. root
2. leave
3. stem
4. seed

✅ Correct Answer: 4

How many zones through which the charge passes in a rotary kiln?

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

✅ Correct Answer: 1

The nutrients which are required in very small amount for the normal growth of plants are called

1. nitrogenous fertilizers
2. micronutrients
3. phosphorus fertilizer
4. all of the above

✅ Correct Answer: 2

Which one of the following set of raw material is most suitable for manufacture of urea?

1. CH4 N2 and CO2
2. H2 N2 and CO
3. H2 CO2 and H2O
4. H2O N2 and H2

✅ Correct Answer: 1

Which one of the following statement is correct for urea?

1. it is a synthetic fertilizer
2. it is a natural fertilizer
3. it provides micronutrients to the plants
4. it is an inorganic water soluble compound

✅ Correct Answer: 1

The percentage of nitrogen in urea is

1. 36%
2. 46%
3. 56%
4. 66%

✅ Correct Answer: 2

Which one of the following is an inorganic fertilizer?

1. manure
2. urea
3. ammonium nitrate
4. All

✅ Correct Answer: 3

Which one of the following fertilizers provides the nitrogen and phosphorus to the plant?

1. urea
2. calcium superphosphate
3. diammonium phosphate
4. potassium nitrate

✅ Correct Answer: 3

The potassium present in plant help the plant to

1. form starch sugar and fibrous material
2. ripen the seeds and fruits
3. increase the resistance against disease
4. all the above statements are correct

✅ Correct Answer: 4

Cement is a mixture of

1. clay and clinker
2. clay lime stone and gypsum
3. lime stone and gypsum
4. lime stone and clay

✅ Correct Answer: 2

What is clinker?

1. roasted calcareous material
2. roasted argillaceous material
3. roasted calcareous and argillaceous material
4. roasted gypsum

✅ Correct Answer: 3

Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage?

1. Lime (CaO)
2. Silica (SiO2)
3. Alumina (Al2O3)
4. Magnesia (MgO)

✅ Correct Answer: 1

Which one of the following raw material is not present in the cement?

1. lime stone
2. gypsum
3. KNO3
4. iron oxide

✅ Correct Answer: 4

Which sequence of steps is correct for the manufacture of cement?

1. crushing heating mixing grinding
2. crushing mixing heating grinding and mixing
3. crushing grinding mixing heating
4. mixing heating grinding crushing

✅ Correct Answer: 3

The sequence of zones in the rotary kiln are as

1. dry zone burning zone decomposition zone cooling zone
2. cooling zone burning zone decomposition zone dry zone
3. burning zone cooling zone decomposition zone
4. dry zone decomposition zone burning zone cooling zone

✅ Correct Answer: 4

The composition of mixture of clay and lime stone in the raw for cement material is

1. 75% lime stone and 25% clay
2. 25% lime stone and 75% clay
3. 15% lime stone and 55% clay
4. 55% lime stone and 15% clay

✅ Correct Answer: 1

The important function of burning zone in the rotary kilm is

1. to dry the moisture of slurry
2. to decompose lime stone to unslaked lime
3. combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
4. to reduce the impurities

✅ Correct Answer: 3

The potato was the staple of Ireland and when the corp failed there was mass starvations.

1. The potato 3209
2. The staple
3. The corp
4. Mass starvations

✅ Correct Answer: 1

Shark can run faster than any other fish because they have no bones.

1. Shark
2. Other
3. Fish
4. have no bones

✅ Correct Answer: 1

The sugars that is refined from sugar-cane and sugar-beet tastes almost the same

1. The sugars
2. Sugar-cane
3. Sugar beet
4. the same

✅ Correct Answer: 1

Testiles industries are as widespread as food industries because both supply basic human needs.

1. textiles industries
2. industries
3. supply basic
4. human needs

✅ Correct Answer: 1

Many animal species are totally colors blind.

1. many
2. animal species
3. are totally
4. colors blind

✅ Correct Answer: 4

Our skulls is made up of eight cardinal and fourteen facial bones.

1. our shulls
2. eight cardinal
3. fourteen
4. facial bones

✅ Correct Answer: 1

Diamonds which is about 40 times as hard as talc made up of pure carbon.

1. diamonds
2. 40 times
3. talc
4. pure carbon

✅ Correct Answer: 1

Brain waves patterns vary among different people and in different activities.

1. brain waves patterns
2. vary among
3. different people
4. different activities

✅ Correct Answer: 1

Lasers are of great value in the areas such as communications and Scientifics research.

1. lasers
2. in the areas
3. such as
4. scientifics research

✅ Correct Answer: 4

Dinosaurs are classified as reptiles, although some appear to have been warms-blooded.

1. dinosaurs
2. as reptiles
3. some appear
4. warms-blooded

✅ Correct Answer: 4

People should mind your own business.

1. people should
2. mind
3. your
4. business

✅ Correct Answer: 3

Everyone of the players would do their best to win the match.

1. everyone
2. of
3. the players
4. their

✅ Correct Answer: 4

The baby had made up her mind.

1. the baby
2. had made
3. her
4. mind

✅ Correct Answer: 3

The teacher as well as the students are busy.

1. the teacher
2. as well as
3. the students
4. are

✅ Correct Answer: 4

Wages of sin are hell.

1. wages
2. of sin
3. are totally
4. hell

✅ Correct Answer: 3

Horse is a faithful animal

1. horse
2. is
3. faithful
4. animal

✅ Correct Answer: 1

He is Ghalib of today.

1. He
2. is
3. Ghalib
4. today

✅ Correct Answer: 3

A large amount of people was there.

1. a large
2. amount
3. people
4. was there

✅ Correct Answer: 2

Sports are essential for health.

1. sports
2. are
3. essential
4. for health

✅ Correct Answer: 2

Brains-cells are in great number.

1. Brains-cells
2. are
3. great
4. number

✅ Correct Answer: 1

The oxygen is essential for life.

1. the oxygen
2. is
3. essential
4. for life

✅ Correct Answer: 1

Some people is protesting against dearness.

1. some
2. is
3. protesting
4. against dearness

✅ Correct Answer: 2

The shephered was grazing the sheeps.

1. the shephered
2. was
3. grazing
4. the sheeps

✅ Correct Answer: 4

Brain stores million of messages.

1. brain
2. stores
3. million
4. messages

✅ Correct Answer: 3

People should mind your own business.

1. people
2. should mind
3. your
4. own business

✅ Correct Answer: 3

The players were doing your best to win the match.

1. the players
2. were doing
3. your
4. to win the match

✅ Correct Answer: 3

The coach will try their best.

1. the coach
2. will try
3. their
4. best

✅ Correct Answer: 3

The committee announced his decision.

1. The committee
2. announced
3. his
4. decision

✅ Correct Answer: 3

The Jury were divided in his opinion.

1. the Jury were
2. divided in
3. his
4. opinion

✅ Correct Answer: 3

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