Chemistry Model Past Paper 2024 PDF

Part – 1 English

Identify the sentence that correctly employs the past perfect continuous tense?
Answer: She had been reading the book for two hours when I called

 A guest is unwelcome when he stays too long.
Answer: Complex

‘He confessed his crime” is an example of ______ sentence
Answer: Simple sentence

Use of Right verb: I found the wristwatch that I ________ lost the day before yesterday.
Answer: had

Went is the Past tense of _____________ ?
Answer: go

 He gave up smoking two years ago. He ______ 40 cigarettes a day.
Answer: used to smoke

 Select the correct present tense: Did she take tea?
Answer: Does she take tea?

Boat : Wake :: Foot :
Answer: Track

Choose the sentence that correctly employs the future perfect tense?
Answer: She will have completed the report by tomorrow

 ___________ elected him president, the people gave him their loyal support.
Answer: having

If he (came) to me, I would have helped him
Answer: had come

Mr. Ajmal was going to continue _______, but his job.
Answer: working

 I__________ waiting for 3 hours
Answer: have been

 No, sooner I reached home ___________ it started to rain.
Answer: than

Which sentence demonstrates the correct use of past tense?
Answer: He had finished his homework before dinner

 Identify the form of Future Simple Tense from the given options?
Answer: Subject + simple future of the verb ‘to be’ + past participle

Professor tends to get bored sitting on the beach, watching the waves, getting sand in his swimsuit, and reading detective novels for a week. it is a ________ sentence.
Answer: Simple

The forest was dark and gloomy, yet the children ran into it fearlessly
Answer: Compound

 Use the right verb. Days ____ longer and nights are getting shorter day to day.
Answer: are getting

I have been studying ___ two hours.
Answer: for

What _______ at the weekend?
Answer: Do you usually do

The town in is the merchant lives is very large
Answer: Complex

 If I _______ to party last night, I ________ met a lot of people
Answer: had gone, would have

It was walking down the street when _______ to rain.
Answer: it began

 Past form of Eat is _______?
Answer: ate

Part-I: Teaching Methodology

Part – II Chemistry

Which one of the following is a polysaccharide?
Answer: Starch

 Amino acids are building blocks of ______?
Answer: Protein

The carbohydrates which contain the aldehyde group are called?
Answer: Aldoses

 Which molecule carries the genetic information in cells and is responsible for the transmission of traits from one generation to the next?
Answer: DNA

CH3-CH2- is _____ radical.
Answer: Ethyl Alkenes ______?
Answer: Have carbon-carbon double bond

Acetic acid is obtained from _____?
Answer: Vinegar

Polyethene is ______?
Answer: Plastic

 The prefix ‘hept’ stands for the ____ carbon atoms.
Answer: 7

 Which of the following is a saturated hydrocarbon?
Answer: CH3-CH2-CH3 (Propane)

Which of the following is an alcohol?
Answer: CH3 – OH (Methanol)

Salt among following is ______?
Answer: KCl (Potassium Chloride)

A substance that can donate a pair of electron to form coordinate covalent bond?
Answer: Lewis base

Which of the following is a Lewis base?
Answer: CN (Cyanide ion)

NH3 can be a base according to ______?
Answer: Both b and c (Bronsted-Lowery theory and Lewis theory)

 Which of the following is not an Arrhenius acid?
Answer: CO2

Preservatives are used to preserve _______?
Answer: Food

Corrosive effect on skin is caused by ______?
Answer: Both Acid & Base

The value of Kc increases when ______?
Answer: [Product] is more

Qc can be defined as _____?
Answer: Ratio of molar concentration of product and reactant raised to the power of coefficient (at any specific time)

The system is stable in equilibrium when ______?
Answer: Qc = Kc

For which system does the equilibrium constant, Kc has units of concentration?
Answer: N2(g) + 3H2(g) ⇌ 2NH3(g)

 When the magnitude of Kc is small, indicates ______?
Answer: Reaction mixture contain most of the reactant

A reaction which is never goes to completion is known as reversible reaction. Reversible reaction is represented by ______?
Answer: Double arrow

Which one of the following statements is false about dynamic equilibrium?
Answer: Equilibrium cannot be disturbed by any external stress

Compounds having the same molecular formula but different structures are called ______?
Answer: Isomers

Glycerin is a ____?
Answer: Colorless liquid

The valency of carbon is ______?
Answer: 4

Which chemical element has properties of a metal and non-metals?
Answer: Metalloid

 Silicon is also called?
Answer: Earth Maker

The rarest gas in air Is?
Answer: Helium

 The gas common known as Laughing gas is?
Answer: Nitrous Oxide

Sedimentary rocks are _______?
Answer: Porous

 In which type of rock is limestone found?
Answer: Sedimentary rock

Butter and margarine are ______ in nature.
Answer: Colloid

Which is the oldest freezing method?
Answer: Brine freezing

The formula of Quartz is _____?
Answer: SiO2

 Diamond is allotropic form of _______?
Answer: Carbon

Brass gets discoloured in air because of the presence of which of the following gases in air?
Answer: Hydrogen Sulphide

When a gas turns into liquid, the process is called?
Answer: Condensation

Hot working of metals is carried out ______?
Answer: Above the recrystallisation temperature

Identify the refractory material that has high resistance to both acid and basic slags?
Answer: Chromite bricks

Identify the hardest metal?
Answer: Tungsten

Environmental protection agencies advise against the use of chloro-fluoro carbon refrigerants since these react with _____?
Answer: Ozone layer

A brazed joint can be satisfactorily made on an article made of _____?
Answer: Copper

The binder in case of synthetic sand is _____?
Answer: Clay

Which of the following allows electricity to pass in molten state?
Answer: Electrolytes

Ozone layer is part of ______?
Answer: Stratosphere

 Formula of ammonium:
Answer: NH₄⁺

 Longest groups in periodic table
Answer: Group 3